From 3446ce9ca28191742627ff4d82035b1105c87d39 Mon Sep 17 00:00:00 2001
From: alwayscompiling <ian.rettig13@gmail.com>
Date: Tue, 6 Dec 2022 22:27:05 -0500
Subject: [PATCH] Change session usage to on use basis.

---
 classes/submission.py                         |  20 +-
 cogs/commands/data_management.py              |  76 ++++----
 cogs/commands/message_management.py           |  79 ++++----
 cogs/commands/settings_management.py          |  84 ++++----
 cogs/commands/views/update_username_verify.py |  50 ++---
 cogs/guild_listener/__init__.py               |  10 +-
 cogs/message_listener/__init__.py             | 112 +++++------
 cogs/submission/submission_views.py           |  41 ++--
 highscores.py                                 |   3 +-
 ...hemy_connection.py => sql_data_classes.py} |   6 +-
 utilities/utils.py                            | 182 ++++++++++--------
 11 files changed, 357 insertions(+), 306 deletions(-)
 rename utilities/{sql_alchemy_connection.py => sql_data_classes.py} (80%)

diff --git a/classes/submission.py b/classes/submission.py
index 88742a5..405cdd4 100644
--- a/classes/submission.py
+++ b/classes/submission.py
@@ -6,9 +6,10 @@ from enum import Enum
 
 from nextcord import Embed
 from sqlalchemy import select
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
-from utilities.sql_alchemy_connection import Category, CategoryGroup, session
+from utilities.sql_data_classes import Category, CategoryGroup, engine
 
 
 class SubmissionState(Enum):
@@ -199,14 +200,15 @@ class Submission:
             .where(CategoryGroup.GuildId == self.guild_id)
             .where(CategoryGroup.GroupId == self.group_id)
         )
-        embed.add_field(name="Group", value=session.scalar(stmt), inline=False)
-        if self.category_id:
-            stmt = (
-                select(Category.CategoryName)
-                .where(Category.GroupId == self.group_id)
-                .where(Category.CategoryId == self.category_id)
-            )
-            embed.add_field(name="Category", value=session.scalar(stmt), inline=False)
+        with Session(engine) as session:
+            embed.add_field(name="Group", value=session.scalar(stmt), inline=False)
+            if self.category_id:
+                stmt = (
+                    select(Category.CategoryName)
+                    .where(Category.GroupId == self.group_id)
+                    .where(Category.CategoryId == self.category_id)
+                )
+                embed.add_field(name="Category", value=session.scalar(stmt), inline=False)
         if self.score:
             embed.add_field(name="Score", value=self.score, inline=False)
 
diff --git a/cogs/commands/data_management.py b/cogs/commands/data_management.py
index 5e16f08..223d809 100644
--- a/cogs/commands/data_management.py
+++ b/cogs/commands/data_management.py
@@ -7,9 +7,10 @@ from typing import Optional
 import nextcord
 from nextcord.ext import commands
 from sqlalchemy import distinct, select
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
-from utilities.sql_alchemy_connection import Category, CategoryGroup, Guild, Score, session
+from utilities.sql_data_classes import Category, CategoryGroup, Guild, Score, engine
 from utilities.utils import (
     autofill_categories,
     autofill_groups,
@@ -70,20 +71,21 @@ class DataManagementCog(commands.Cog, name="Table Management"):
             user_name (str): User to remove from highscores
         """
 
-        stmt = select(distinct(Score.CategoryId)).where(Score.UserName == user_name)
-        category_ids: "list[int]" = list(session.scalars(stmt))
+        with Session(engine) as session:
+            stmt = select(distinct(Score.CategoryId)).where(Score.UserName == user_name)
+            category_ids: "list[int]" = list(session.scalars(stmt))
 
-        stmt = select(Score).where(Score.UserName == user_name)
-        for score in session.scalars(stmt):
-            session.delete(score)
-        session.commit()
+            stmt = select(Score).where(Score.UserName == user_name)
+            for score in session.scalars(stmt):
+                session.delete(score)
+            session.commit()
 
-        group_ids = select(Category.GroupId).where(Category.CategoryId.in_(category_ids))
+            group_ids = select(Category.GroupId).where(Category.CategoryId.in_(category_ids))
 
-        stmt = select(CategoryGroup).where(CategoryGroup.GroupId.in_(group_ids))
+            stmt = select(CategoryGroup).where(CategoryGroup.GroupId.in_(group_ids))
 
-        for group in session.scalars(stmt):
-            await send_highscore_message(interaction.guild.get_channel(group.ChannelId), group)
+            for group in session.scalars(stmt):
+                await send_highscore_message(session, interaction.guild.get_channel(group.ChannelId), group)
 
         await interaction.send(f'User "{user_name}" was removed from all tables.', ephemeral=True)
 
@@ -107,20 +109,23 @@ class DataManagementCog(commands.Cog, name="Table Management"):
             user_name (str): The user to remove. Is SlashOption.
         """
 
-        stmt = select(CategoryGroup).where(CategoryGroup.GroupId == int(group_id))
-        group = session.scalar(stmt)
+        with Session(engine) as session:
+            stmt = select(CategoryGroup).where(CategoryGroup.GroupId == int(group_id))
+            group = session.scalar(stmt)
 
-        stmt = select(Category.CategoryName).where(Category.CategoryId == int(category_id))
-        category_name = session.scalar(stmt)
+            stmt = select(Category.CategoryName).where(Category.CategoryId == int(category_id))
+            category_name = session.scalar(stmt)
 
-        stmt = select(Score).where(Score.CategoryId == int(category_id)).where(Score.UserName == user_name)
+            stmt = select(Score).where(Score.CategoryId == int(category_id)).where(Score.UserName == user_name)
 
-        # there should only be one because category id and username are a composite primary key in score
-        session.delete(session.scalar(stmt))
-        session.commit()
+            # there should only be one because category id and username are a composite primary key in score
+            session.delete(session.scalar(stmt))
+            session.commit()
 
-        await send_highscore_message(interaction.guild.get_channel(group.ChannelId), group)
-        await interaction.response.send_message(f'User "{user_name}" removed from "{category_name}".', ephemeral=True)
+            await send_highscore_message(session, interaction.guild.get_channel(group.ChannelId), group)
+            await interaction.response.send_message(
+                f'User "{user_name}" removed from "{category_name}".', ephemeral=True
+            )
 
     @user.subcommand(description="Deletes a user's scores from entire group.")
     async def from_group(
@@ -138,19 +143,20 @@ class DataManagementCog(commands.Cog, name="Table Management"):
             user_name (str): The user to remove. Is SlashOption.
         """
 
-        stmt = select(CategoryGroup).where(CategoryGroup.GroupId == int(group_id))
-        group = session.scalar(stmt)
-        category_ids = select(Category.CategoryId).where(Category.GroupId == int(group_id))
-        stmt = select(Score).where(Score.CategoryId.in_(category_ids)).where(Score.UserName == user_name)
+        with Session(engine) as session:
+            stmt = select(CategoryGroup).where(CategoryGroup.GroupId == int(group_id))
+            group = session.scalar(stmt)
+            category_ids = select(Category.CategoryId).where(Category.GroupId == int(group_id))
+            stmt = select(Score).where(Score.CategoryId.in_(category_ids)).where(Score.UserName == user_name)
 
-        for score in session.scalars(stmt):
-            session.delete(score)
-        session.commit()
+            for score in session.scalars(stmt):
+                session.delete(score)
+            session.commit()
 
-        await send_highscore_message(interaction.guild.get_channel(group.ChannelId), group)
-        await interaction.response.send_message(
-            f'User "{user_name}" removed from all categories in {group.GroupName}.', ephemeral=True
-        )
+            await send_highscore_message(session, interaction.guild.get_channel(group.ChannelId), group)
+            await interaction.response.send_message(
+                f'User "{user_name}" removed from all categories in {group.GroupName}.', ephemeral=True
+            )
 
     @from_category.on_autocomplete("group_id")
     @from_group.on_autocomplete("group_id")
@@ -215,8 +221,10 @@ class DataManagementCog(commands.Cog, name="Table Management"):
             old_username (str): Username to replace.
             new_username (str): Username to replace old with.
         """
-        stmt = select(Guild.VerificationChannel).where(Guild.GuildId == interaction.guild_id)
-        verify_channel = interaction.guild.get_channel(session.scalar(stmt))
+
+        with Session(engine) as session:
+            stmt = select(Guild.VerificationChannel).where(Guild.GuildId == interaction.guild_id)
+            verify_channel = interaction.guild.get_channel(session.scalar(stmt))
 
         embed: nextcord.Embed = nextcord.Embed(title="Username change request.")
         embed.add_field(name="Old Username", value=old_username)
diff --git a/cogs/commands/message_management.py b/cogs/commands/message_management.py
index c90810a..bbbb870 100644
--- a/cogs/commands/message_management.py
+++ b/cogs/commands/message_management.py
@@ -7,10 +7,11 @@ from typing import Optional
 import nextcord
 from nextcord.ext import commands
 from sqlalchemy import select
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
 from cogs.submission.submission_views import SubmissionCreateButton
-from utilities.sql_alchemy_connection import CategoryGroup, session
+from utilities.sql_data_classes import CategoryGroup, engine
 from utilities.utils import autofill_groups, send_highscore_message
 
 
@@ -55,23 +56,24 @@ class MessageManagementCog(commands.Cog, name="Message Management"):
         if not channel:
             channel = interaction.channel
 
-        stmt = (
-            select(CategoryGroup)
-            .where(CategoryGroup.GuildId == interaction.guild_id)
-            .where(CategoryGroup.ChannelId == channel.id)
-        )
-        # TODO test when nothing in channel
-        groups = session.scalars(stmt)
+        with Session(engine) as session:
+            stmt = (
+                select(CategoryGroup)
+                .where(CategoryGroup.GuildId == interaction.guild_id)
+                .where(CategoryGroup.ChannelId == channel.id)
+            )
+            # TODO test when nothing in channel
+            groups = session.scalars(stmt)
 
-        await interaction.response.defer(ephemeral=True)
+            await interaction.response.defer(ephemeral=True)
 
-        for group in groups:
-            try:
-                table_message: nextcord.Message = await channel.fetch_message(group.MessageId)
-                await table_message.delete()
-            except nextcord.NotFound:
-                # silently ignore that messages are not found. They got deleted already.
-                pass
+            for group in groups:
+                try:
+                    table_message: nextcord.Message = await channel.fetch_message(group.MessageId)
+                    await table_message.delete()
+                except nextcord.NotFound:
+                    # silently ignore that messages are not found. They got deleted already.
+                    pass
 
         await interaction.send("Table messages deleted.", ephemeral=True)
 
@@ -90,21 +92,23 @@ class MessageManagementCog(commands.Cog, name="Message Management"):
         Args:
             interaction (nextcord.Interaction): Interaction that invoked the command.
         """
-        stmt = select(CategoryGroup).where(CategoryGroup.GuildId == interaction.guild_id)
 
-        # awaiting response because posting scores takes a while
-        await interaction.response.defer(ephemeral=True)
+        with Session(engine) as session:
+            stmt = select(CategoryGroup).where(CategoryGroup.GuildId == interaction.guild_id)
 
-        for group in session.scalars(stmt):
-            channel = interaction.guild.get_channel(group.ChannelId)
+            # awaiting response because posting scores takes a while
+            await interaction.response.defer(ephemeral=True)
 
-            # Error checking for registered highscore channel
-            error_response = "Registered Highscores channel does not exist or was never registered. "
-            error_response += 'Use "/register" to register channels.'
-            assert channel is not None, await interaction.response(error_response, ephemeral=True)
+            for group in session.scalars(stmt):
+                channel = interaction.guild.get_channel(group.ChannelId)
 
-            message: nextcord.Message = await send_highscore_message(channel, group)
-            await message.edit(view=SubmissionCreateButton(self.bot))
+                # Error checking for registered highscore channel
+                error_response = "Registered Highscores channel does not exist or was never registered. "
+                error_response += 'Use "/register" to register channels.'
+                assert channel is not None, await interaction.response(error_response, ephemeral=True)
+
+                message: nextcord.Message = await send_highscore_message(session, channel, group)
+                await message.edit(view=SubmissionCreateButton(self.bot))
 
         await interaction.send(f"Posted all groups in {interaction.guild.name}'s highscores.", ephemeral=True)
 
@@ -125,19 +129,20 @@ class MessageManagementCog(commands.Cog, name="Message Management"):
             group_id (str): Str representation of Group id to refresh. Is SlashOption.
         """
 
-        stmt = (
-            select(CategoryGroup)
-            .where(CategoryGroup.GuildId == interaction.guild_id)
-            .where(CategoryGroup.GroupId == int(group_id))
-        )
-        group = session.scalar(stmt)
+        with Session(engine) as session:
+            stmt = (
+                select(CategoryGroup)
+                .where(CategoryGroup.GuildId == interaction.guild_id)
+                .where(CategoryGroup.GroupId == int(group_id))
+            )
+            group = session.scalar(stmt)
 
-        channel = interaction.guild.get_channel(group.ChannelId)
+            channel = interaction.guild.get_channel(group.ChannelId)
 
-        message: nextcord.Message = await send_highscore_message(channel, group)
-        await message.edit(view=SubmissionCreateButton(self.bot))
+            message: nextcord.Message = await send_highscore_message(session, channel, group)
+            await message.edit(view=SubmissionCreateButton(self.bot))
 
-        await interaction.response.send_message(f"Updated table {group.GroupName}!", ephemeral=True)
+            await interaction.response.send_message(f"Updated table {group.GroupName}!", ephemeral=True)
 
     @refresh_group.on_autocomplete("group_id")
     async def refresh_table_autofill(self, interaction: nextcord.Interaction, group_id: str):
diff --git a/cogs/commands/settings_management.py b/cogs/commands/settings_management.py
index bca7364..ee20529 100644
--- a/cogs/commands/settings_management.py
+++ b/cogs/commands/settings_management.py
@@ -7,9 +7,10 @@ from typing import Optional
 import nextcord
 from nextcord.ext import commands
 from sqlalchemy import select
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
-from utilities.sql_alchemy_connection import CategoryGroup, Guild, session
+from utilities.sql_data_classes import CategoryGroup, Guild, engine
 from utilities.utils import autofill_groups
 
 
@@ -52,17 +53,19 @@ class SettingsManagementCog(commands.Cog, name="Settings Management"):
             channel (nextcord.abc.GuildChannel, optional): Channel to register
                 Is a SlashOption. Limited to text channels, Defaults to None.
         """
+
         if not channel:
             channel = interaction.channel
         channel_id = channel.id
-        stmt = (
-            select(CategoryGroup)
-            .where(CategoryGroup.GuildId == interaction.guild_id)
-            .where(CategoryGroup.GroupId == int(group_id))
-        )
-        group = session.scalar(stmt)
-        group.ChannelId = channel_id
-        session.commit()
+        with Session(engine) as session:
+            stmt = (
+                select(CategoryGroup)
+                .where(CategoryGroup.GuildId == interaction.guild_id)
+                .where(CategoryGroup.GroupId == int(group_id))
+            )
+            group = session.scalar(stmt)
+            group.ChannelId = channel_id
+            session.commit()
         await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)
 
     @register.subcommand(description="Registers the channel for submission messages.")
@@ -84,13 +87,16 @@ class SettingsManagementCog(commands.Cog, name="Settings Management"):
             channel Optional[nextcord.abc.GuildChannel], optional): Channel to register
                 Is a SlashOption. Limited to text channels, Defaults to None.
         """
+
         if not channel:
             channel = interaction.channel
-        channel_id = channel.id
-        stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
-        guild = session.scalar(stmt)
-        guild.SubmissionChannel = channel_id
-        session.commit()
+
+        with Session(engine) as session:
+            channel_id = channel.id
+            stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
+            guild = session.scalar(stmt)
+            guild.SubmissionChannel = channel_id
+            session.commit()
         await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)
 
     @register.subcommand(description="Registers the channel for verification messages.")
@@ -112,13 +118,15 @@ class SettingsManagementCog(commands.Cog, name="Settings Management"):
             channel (Optional[nextcord.abc.GuildChannel]): Channel to register
                 Is a SlashOption. Limited to text channels, Defaults to None.
         """
+
         if not channel:
             channel = interaction.channel
         channel_id = channel.id
-        stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
-        guild = session.scalar(stmt)
-        guild.VerificationChannel = channel_id
-        session.commit()
+        with Session(engine) as session:
+            stmt = select(Guild).where(Guild.GuildId == interaction.guild_id)
+            guild = session.scalar(stmt)
+            guild.VerificationChannel = channel_id
+            session.commit()
         await interaction.send(f"Registered <#{channel_id}>.", ephemeral=True)
 
     @nextcord.slash_command(default_member_permissions=nextcord.Permissions(administrator=True))
@@ -147,17 +155,18 @@ class SettingsManagementCog(commands.Cog, name="Settings Management"):
             length (int): Number of characters. Is SlashOption. Defaults to 26.
         """
 
-        stmt = (
-            select(CategoryGroup)
-            .where(CategoryGroup.GuildId == interaction.guild_id)
-            .where(CategoryGroup.GroupId == int(group_id))
-        )
-        group = session.scalar(stmt)
-        group.PadLength = length
-        session.commit()
-        await interaction.response.send_message(
-            f"Category pad length set to {length} for {group.GroupName}", ephemeral=True
-        )
+        with Session(engine) as session:
+            stmt = (
+                select(CategoryGroup)
+                .where(CategoryGroup.GuildId == interaction.guild_id)
+                .where(CategoryGroup.GroupId == int(group_id))
+            )
+            group = session.scalar(stmt)
+            group.PadLength = length
+            session.commit()
+            await interaction.response.send_message(
+                f"Category pad length set to {length} for {group.GroupName}", ephemeral=True
+            )
 
     @set.subcommand(description="Set username length for a Group of Categories.")
     async def username_length(
@@ -176,14 +185,15 @@ class SettingsManagementCog(commands.Cog, name="Settings Management"):
             length (int): Number of characters. Is SlashOption. Defaults to 12.
         """
 
-        stmt = (
-            select(CategoryGroup)
-            .where(CategoryGroup.GuildId == interaction.guild_id)
-            .where(CategoryGroup.GroupId == int(group_id))
-        )
-        group = session.scalar(stmt)
-        group.UsernameLength = length
-        session.commit()
+        with Session(engine) as session:
+            stmt = (
+                select(CategoryGroup)
+                .where(CategoryGroup.GuildId == interaction.guild_id)
+                .where(CategoryGroup.GroupId == int(group_id))
+            )
+            group = session.scalar(stmt)
+            group.UsernameLength = length
+            session.commit()
         await interaction.response.send_message(f"Username length set to {length}.", ephemeral=True)
 
     @group_output_channel.on_autocomplete("group_id")
diff --git a/cogs/commands/views/update_username_verify.py b/cogs/commands/views/update_username_verify.py
index b3d539c..8ff4ca4 100644
--- a/cogs/commands/views/update_username_verify.py
+++ b/cogs/commands/views/update_username_verify.py
@@ -2,9 +2,10 @@
 
 import nextcord
 from sqlalchemy import distinct, exc, select
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
-from utilities.sql_alchemy_connection import Category, CategoryGroup, Score, session
+from utilities.sql_data_classes import Category, CategoryGroup, Score, engine
 from utilities.utils import send_highscore_message
 
 
@@ -43,32 +44,33 @@ class UpdateUsernameVerifyView(nextcord.ui.View):
             interaction (nextcord.Interaction): Interaction with the button
         """
 
-        try:
-            embed_content = interaction.message.embeds[0].to_dict()
-            old_username: str = embed_content["fields"][0]["value"]
-            new_username: str = embed_content["fields"][1]["value"]
+        with Session(engine) as session:
+            try:
+                embed_content = interaction.message.embeds[0].to_dict()
+                old_username: str = embed_content["fields"][0]["value"]
+                new_username: str = embed_content["fields"][1]["value"]
 
-            stmt = select(distinct(Score.CategoryId)).where(Score.UserName == old_username)
-            category_ids: "list[int]" = list(session.scalars(stmt))
+                stmt = select(distinct(Score.CategoryId)).where(Score.UserName == old_username)
+                category_ids: "list[int]" = list(session.scalars(stmt))
 
-            stmt = select(Score).where(Score.UserName == old_username)
-            for score in session.scalars(stmt):
-                score.UserName = new_username
-            session.commit()
+                stmt = select(Score).where(Score.UserName == old_username)
+                for score in session.scalars(stmt):
+                    score.UserName = new_username
+                session.commit()
 
-            group_ids = select(Category.GroupId).where(Category.CategoryId.in_(category_ids))
+                group_ids = select(Category.GroupId).where(Category.CategoryId.in_(category_ids))
 
-            stmt = select(CategoryGroup).where(CategoryGroup.GroupId.in_(group_ids))
+                stmt = select(CategoryGroup).where(CategoryGroup.GroupId.in_(group_ids))
 
-            for group in session.scalars(stmt):
-                await send_highscore_message(interaction.guild.get_channel(group.ChannelId), group)
+                for group in session.scalars(stmt):
+                    await send_highscore_message(session, interaction.guild.get_channel(group.ChannelId), group)
 
-            content = interaction.message.content
-            content += f"\nApproved by <@{interaction.user.id}>."
-            await interaction.message.edit(content=content, embeds=interaction.message.embeds, view=None)
-        except exc.DataError:
-            session.rollback()
-            content = interaction.message.content
-            content += "\nError, UserName is too long."
-            await interaction.message.edit(content=content, embeds=interaction.message.embeds, view=None)
-            await interaction.response.send_message(content="User must resubmit with shorter name.", ephemeral=True)
+                content = interaction.message.content
+                content += f"\nApproved by <@{interaction.user.id}>."
+                await interaction.message.edit(content=content, embeds=interaction.message.embeds, view=None)
+            except exc.DataError:
+                session.rollback()
+                content = interaction.message.content
+                content += "\nError, UserName is too long."
+                await interaction.message.edit(content=content, embeds=interaction.message.embeds, view=None)
+                await interaction.response.send_message(content="User must resubmit with shorter name.", ephemeral=True)
diff --git a/cogs/guild_listener/__init__.py b/cogs/guild_listener/__init__.py
index de87bc4..965b17f 100644
--- a/cogs/guild_listener/__init__.py
+++ b/cogs/guild_listener/__init__.py
@@ -4,9 +4,10 @@ Defines cog for guild listeners. Contains functions for various guild events.
 
 import nextcord
 from nextcord.ext import commands
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
-from utilities.sql_alchemy_connection import Guild, session
+from utilities.sql_data_classes import Guild, engine
 from utilities.utils import add_preset_configuration
 
 
@@ -19,9 +20,12 @@ class GuildListener(commands.Cog, name="Guild Listener"):
     @commands.Cog.listener()
     async def on_guild_join(self, guild: nextcord.Guild):
         """Listener for Guild Join. Creates skeleton for new guild joined and saves it."""
+
         new_guild = Guild(GuildId=guild.id)
-        session.add(new_guild)
-        session.commit()
+
+        with Session(engine) as session:
+            session.add(new_guild)
+            session.commit()
         # This add config will be removed eventually. Config adding will have to be controlled by commands.
         add_preset_configuration(guild.id, "runescape")
 
diff --git a/cogs/message_listener/__init__.py b/cogs/message_listener/__init__.py
index 05c2bba..a1468d7 100644
--- a/cogs/message_listener/__init__.py
+++ b/cogs/message_listener/__init__.py
@@ -7,12 +7,12 @@ import re
 import nextcord
 from nextcord.ext import commands
 from sqlalchemy import select
-from sqlalchemy.orm import aliased
+from sqlalchemy.orm import Session
 
 # pylint: disable=import-error
 from classes.submission import SubmissionState
 from highscores import submission_objects
-from utilities.sql_alchemy_connection import Category, CategoryGroup, Guild, session
+from utilities.sql_data_classes import Category, Guild, engine
 
 
 class SubmissionListener(commands.Cog, name="Message Listener"):
@@ -33,66 +33,68 @@ class SubmissionListener(commands.Cog, name="Message Listener"):
         if submission_objects.has_user(message.author.id):
             submission = submission_objects.get_user_submission(message.author.id)
             message_id = submission.message_id
-            stmt = select(Guild.SubmissionChannel).where(Guild.GuildId == guild_id)
-            submission_channel_id = session.scalar(stmt)
-            submission_message: nextcord.Message = (
-                await self.bot.get_guild(guild_id).get_channel(submission_channel_id).fetch_message(message_id)
-            )
 
-            # need check if correct user and correct channel
-            if message.channel.id == submission_channel_id:
-                state = submission.submission_state
-                if state == SubmissionState.SCORE and message.content:
+            with Session(engine) as session:
+                stmt = select(Guild.SubmissionChannel).where(Guild.GuildId == guild_id)
+                submission_channel_id = session.scalar(stmt)
+                submission_message: nextcord.Message = (
+                    await self.bot.get_guild(guild_id).get_channel(submission_channel_id).fetch_message(message_id)
+                )
 
-                    stmt = select(Category.IsTimeRecord).where(Category.CategoryId == submission.category_id)
+                # need check if correct user and correct channel
+                if message.channel.id == submission_channel_id:
+                    state = submission.submission_state
+                    if state == SubmissionState.SCORE and message.content:
 
-                    # check with regex if score matches correctly
-                    is_time_record = session.scalar(stmt)
+                        stmt = select(Category.IsTimeRecord).where(Category.CategoryId == submission.category_id)
 
-                    time_regex = re.search("^([0-9]{1,2}:[0-9]|[0-9])?[0-9](\\.[0-9])?$", message.content)
-                    int_regex = re.search("^[0-9]+$", message.content)
-                    if time_regex is None and is_time_record:
-                        embeds = submission_message.embeds[0]
-                        embeds.add_field(
-                            name="Error",
-                            value="Time record must follow format MM:SS.ms, SS.ms, or SS.",
+                        # check with regex if score matches correctly
+                        is_time_record = session.scalar(stmt)
+
+                        time_regex = re.search("^([0-9]{1,2}:[0-9]|[0-9])?[0-9](\\.[0-9])?$", message.content)
+                        int_regex = re.search("^[0-9]+$", message.content)
+                        if time_regex is None and is_time_record:
+                            embeds = submission_message.embeds[0]
+                            embeds.add_field(
+                                name="Error",
+                                value="Time record must follow format MM:SS.ms, SS.ms, or SS.",
+                            )
+                        elif int_regex is None and not is_time_record:
+                            embeds = submission_message.embeds[0]
+                            embeds.add_field(name="Error", value="Number record must only be number.")
+                        else:
+                            score = message.content
+                            if is_time_record:
+                                # standardize time score format.
+                                if re.search("^[1-9]?[0-9]:[0-9]{2}(\\.[0-9])?$", score):
+                                    # score is already fine.
+                                    pass
+                                elif re.search("^[0-9]{2}(\\.[0-9])?$", score):
+                                    # need to add leading colon and 0
+                                    score = "0:" + score
+                                elif re.search("^[0-9](\\.[0-9])?$", score):
+                                    # need to add 0 in seconds and leading colon and 0
+                                    score = "0:0" + score
+                                elif re.search("^[0]?[0-9]:[0-9]{2}(\\.[0-9])?$", score):
+                                    # if there is a minute 10ths place 0, remove
+                                    score = score.lstrip("0")
+                            submission.score = score
+                            embeds = submission.get_embeds()
+                        await submission_message.edit(
+                            embeds=embeds,
                         )
-                    elif int_regex is None and not is_time_record:
-                        embeds = submission_message.embeds[0]
-                        embeds.add_field(name="Error", value="Number record must only be number.")
-                    else:
-                        score = message.content
-                        if is_time_record:
-                            # standardize time score format.
-                            if re.search("^[1-9]?[0-9]:[0-9]{2}(\\.[0-9])?$", score):
-                                # score is already fine.
-                                pass
-                            elif re.search("^[0-9]{2}(\\.[0-9])?$", score):
-                                # need to add leading colon and 0
-                                score = "0:" + score
-                            elif re.search("^[0-9](\\.[0-9])?$", score):
-                                # need to add 0 in seconds and leading colon and 0
-                                score = "0:0" + score
-                            elif re.search("^[0]?[0-9]:[0-9]{2}(\\.[0-9])?$", score):
-                                # if there is a minute 10ths place 0, remove
-                                score = score.lstrip("0")
-                        submission.score = score
+                    elif state == SubmissionState.PROOF and len(message.attachments) > 0:
+                        await submission_message.edit(
+                            files=[await attch.to_file() for attch in message.attachments],
+                        )
+                    elif state == SubmissionState.NAME and message.content:
+                        submission.username = message.content
                         embeds = submission.get_embeds()
-                    await submission_message.edit(
-                        embeds=embeds,
-                    )
-                elif state == SubmissionState.PROOF and len(message.attachments) > 0:
-                    await submission_message.edit(
-                        files=[await attch.to_file() for attch in message.attachments],
-                    )
-                elif state == SubmissionState.NAME and message.content:
-                    submission.username = message.content
-                    embeds = submission.get_embeds()
-                    await submission_message.edit(
-                        embeds=embeds,
-                    )
+                        await submission_message.edit(
+                            embeds=embeds,
+                        )
 
-                await message.delete()
+                    await message.delete()
 
 
 # This function will be called when this extension is loaded.
diff --git a/cogs/submission/submission_views.py b/cogs/submission/submission_views.py
index 08f7bf8..8954edf 100644
--- a/cogs/submission/submission_views.py
+++ b/cogs/submission/submission_views.py
@@ -5,12 +5,12 @@ from typing import Optional
 import nextcord
 from nextcord.ext import commands
 from sqlalchemy import select
-from sqlalchemy.orm import aliased
+from sqlalchemy.orm import Session, aliased
 
 # pylint: disable=import-error
 from classes.submission import Submission, SubmissionState
-from utilities.sql_alchemy_connection import Category, Guild, CategoryGroup, session
 from highscores import submission_objects
+from utilities.sql_data_classes import Category, CategoryGroup, Guild, engine
 
 from .verification_view import VerificationView
 
@@ -18,12 +18,14 @@ from .verification_view import VerificationView
 def category_select_options(group_id: int) -> "list[nextcord.SelectOption]":
     """Returns list of categories for a given boss."""
     options: "list[nextcord.SelectOption]" = []
-    subq = select(CategoryGroup).where(CategoryGroup.GroupId == group_id).subquery()
-    cat_group_alias = aliased(CategoryGroup, subq)
-    stmt = select(Category).where(Category.GroupId == cat_group_alias.GroupId)
-    categories_list = session.scalars(stmt)
-    for category in categories_list:
-        options.append(nextcord.SelectOption(label=category.CategoryName, value=str(category.CategoryId)))
+
+    with Session(engine) as session:
+        subq = select(CategoryGroup).where(CategoryGroup.GroupId == group_id).subquery()
+        cat_group_alias = aliased(CategoryGroup, subq)
+        stmt = select(Category).where(Category.GroupId == cat_group_alias.GroupId)
+        categories_list = session.scalars(stmt)
+        for category in categories_list:
+            options.append(nextcord.SelectOption(label=category.CategoryName, value=str(category.CategoryId)))
 
     return options
 
@@ -110,8 +112,9 @@ class SubmitButton(nextcord.ui.Button):
         self._bot = bot
 
     async def callback(self, interaction: nextcord.Interaction):
-        stmt = select(Guild.VerificationChannel).where(Guild.GuildId == interaction.guild_id)
-        verification_channel_id = session.scalar(stmt)
+        with Session(engine) as session:
+            stmt = select(Guild.VerificationChannel).where(Guild.GuildId == interaction.guild_id)
+            verification_channel_id = session.scalar(stmt)
         channel = interaction.guild.get_channel(verification_channel_id)
         submission = submission_objects.get_user_submission(interaction.user.id)
 
@@ -148,20 +151,22 @@ class SubmissionCreateButton(nextcord.ui.View):
         self, button: nextcord.ui.Button, interaction: nextcord.Interaction
     ):  # pylint: disable=unused-argument
         """Button for score submission."""
+
         # Don't allow a user to start a new submission if one already exists
         if submission_objects.has_user(interaction.user.id):
             await interaction.send("Please finish in progress submission first.", ephemeral=True)
             return
 
-        stmt = (
-            select(CategoryGroup.GroupId)
-            .where(CategoryGroup.GuildId == interaction.guild_id)
-            .where(CategoryGroup.MessageId == interaction.message.id)
-        )
-        group_id = session.scalar(stmt)
+        with Session(engine) as session:
+            stmt = (
+                select(CategoryGroup.GroupId)
+                .where(CategoryGroup.GuildId == interaction.guild_id)
+                .where(CategoryGroup.MessageId == interaction.message.id)
+            )
+            group_id = session.scalar(stmt)
 
-        stmt = select(Guild.SubmissionChannel).where(Guild.GuildId == interaction.guild_id)
-        channel = interaction.guild.get_channel(session.scalar(stmt))
+            stmt = select(Guild.SubmissionChannel).where(Guild.GuildId == interaction.guild_id)
+            channel = interaction.guild.get_channel(session.scalar(stmt))
 
         # a user should only have 1 submission active at once.
         # split username on pipe. Decided to store whole username...
diff --git a/highscores.py b/highscores.py
index b65fde3..224f7f5 100644
--- a/highscores.py
+++ b/highscores.py
@@ -9,7 +9,8 @@ import sys
 import nextcord
 from nextcord.ext import commands
 
-import utilities.config as config
+# pylint: disable=import-error
+from utilities import config
 from classes.submission import SubmissionMap
 
 logger = logging.getLogger("nextcord")
diff --git a/utilities/sql_alchemy_connection.py b/utilities/sql_data_classes.py
similarity index 80%
rename from utilities/sql_alchemy_connection.py
rename to utilities/sql_data_classes.py
index 40b5bb2..f3bd1fa 100644
--- a/utilities/sql_alchemy_connection.py
+++ b/utilities/sql_data_classes.py
@@ -3,17 +3,15 @@ Simple file to set up the sqlalchemy connection to database.
 """
 from sqlalchemy import create_engine
 from sqlalchemy.ext.automap import automap_base
-from sqlalchemy.orm import Session
 
-import utilities.config as config
+# pylint: disable=import-error
+from utilities import config
 
 # connect with sql alchemy and autoload schema
 url = f"mysql://{config.SQL_USER}:{config.SQL_PASS}@{config.SQL_HOST}/{config.SQL_DB}"
 engine = create_engine(url)
-connection = engine.connect()
 Base = automap_base()
 Base.prepare(autoload_with=engine)
-session = Session(engine)
 
 # define the classes
 Guild = Base.classes.Guilds
diff --git a/utilities/utils.py b/utilities/utils.py
index 8c1c336..0a9fd31 100644
--- a/utilities/utils.py
+++ b/utilities/utils.py
@@ -8,10 +8,10 @@ import time
 import nextcord
 import pandas as pd
 from sqlalchemy import distinct, select
-from sqlalchemy.orm import aliased
+from sqlalchemy.orm import Session, aliased
 
 # pylint: disable=import-error
-from utilities.sql_alchemy_connection import Category, CategoryGroup, Guild, Score, engine, session
+from utilities.sql_data_classes import Category, CategoryGroup, Guild, Score, engine
 
 MAX_LINE_LENGTH = 142
 
@@ -30,16 +30,17 @@ def autofill_categories(guild_id: int, group_id: int, category_begin: str) -> "d
         dict[str, str]: List of all category names that start with category_begin.
     """
 
-    # search database for all category names
-    subq = (
-        select(CategoryGroup)
-        .where(CategoryGroup.GuildId == guild_id)
-        .where(CategoryGroup.GroupId == group_id)
-        .subquery()
-    )
-    cat_group_alias = aliased(CategoryGroup, subq)
-    stmt = select(Category).where(Category.GroupId == cat_group_alias.GroupId)
-    categories_dict: dict = {cat.CategoryName: str(cat.CategoryId) for cat in session.scalars(stmt)}
+    with Session(engine) as session:
+        # search database for all category names
+        subq = (
+            select(CategoryGroup)
+            .where(CategoryGroup.GuildId == guild_id)
+            .where(CategoryGroup.GroupId == group_id)
+            .subquery()
+        )
+        cat_group_alias = aliased(CategoryGroup, subq)
+        stmt = select(Category).where(Category.GroupId == cat_group_alias.GroupId)
+        categories_dict: dict = {cat.CategoryName: str(cat.CategoryId) for cat in session.scalars(stmt)}
 
     # if string empty, return all category names
     if not category_begin:
@@ -65,11 +66,12 @@ def autofill_groups(guild_id: int, group_begin: str) -> "dict[str, str]":
         dict[str, str]: Dict of group names and ids where group name start with group_begin. Key is name, value is id.
     """
 
-    # Select all groups in guild.
-    stmt = select(CategoryGroup).where(CategoryGroup.GuildId == guild_id)
+    with Session(engine) as session:
+        # Select all groups in guild.
+        stmt = select(CategoryGroup).where(CategoryGroup.GuildId == guild_id)
 
-    # dict has to have key values of same type for discord.
-    group_dict: dict = {group.GroupName: str(group.GroupId) for group in session.scalars(stmt)}
+        # dict has to have key values of same type for discord.
+        group_dict: dict = {group.GroupName: str(group.GroupId) for group in session.scalars(stmt)}
 
     # if string empty, return all group names
     if not group_begin:
@@ -98,32 +100,33 @@ def autofill_users_in_group_category(guild_id: int, group_id: int, category_id:
         list[str]: List of users that start with user_begin.
     """
 
-    # get all categories in the group
-    subq = (
-        select(CategoryGroup)
-        .where(CategoryGroup.GuildId == guild_id)
-        .where(CategoryGroup.GroupId == group_id)
-        .subquery()
-    )
-    category_group = aliased(CategoryGroup, subq)
-
-    # If no category id, get all users in group.
-    if category_id == 0:
-        subq = select(Category.CategoryId).where(Category.GroupId == category_group.GroupId)
-        stmt = select(distinct(Score.UserName)).where(Score.CategoryId.in_(subq))
-
-    else:
-        # get all users in category_id
+    with Session(engine) as session:
+        # get all categories in the group
         subq = (
-            select(Category)
-            .where(Category.GroupId == category_group.GroupId)
-            .where(Category.CategoryId == category_id)
+            select(CategoryGroup)
+            .where(CategoryGroup.GuildId == guild_id)
+            .where(CategoryGroup.GroupId == group_id)
             .subquery()
         )
-        category = aliased(Category, subq)
-        stmt = select(distinct(Score.UserName)).where(Score.CategoryId == category.CategoryId)
+        category_group = aliased(CategoryGroup, subq)
 
-    users_list: "list[str]" = list(session.scalars(stmt))
+        # If no category id, get all users in group.
+        if category_id == 0:
+            subq = select(Category.CategoryId).where(Category.GroupId == category_group.GroupId)
+            stmt = select(distinct(Score.UserName)).where(Score.CategoryId.in_(subq))
+
+        else:
+            # get all users in category_id
+            subq = (
+                select(Category)
+                .where(Category.GroupId == category_group.GroupId)
+                .where(Category.CategoryId == category_id)
+                .subquery()
+            )
+            category = aliased(Category, subq)
+            stmt = select(distinct(Score.UserName)).where(Score.CategoryId == category.CategoryId)
+
+        users_list: "list[str]" = list(session.scalars(stmt))
 
     # if string empty, return all users
     if not user_begin:
@@ -146,10 +149,12 @@ def autofill_users_in_guild(guild_id: int, user_begin: str) -> "list[str]":
     Returns:
         list[str]: All users with submissions in the guild.
     """
-    group_ids = select(CategoryGroup.GroupId).where(CategoryGroup.GuildId == guild_id)
-    category_ids = select(Category.CategoryId).where(Category.GroupId.in_(group_ids))
-    stmt = select(distinct(Score.UserName)).where(Score.CategoryId.in_(category_ids))
-    users_list: "list[str]" = list(session.scalars(stmt))
+
+    with Session(engine) as session:
+        group_ids = select(CategoryGroup.GroupId).where(CategoryGroup.GuildId == guild_id)
+        category_ids = select(Category.CategoryId).where(Category.GroupId.in_(group_ids))
+        stmt = select(distinct(Score.UserName)).where(Score.CategoryId.in_(category_ids))
+        users_list: "list[str]" = list(session.scalars(stmt))
 
     # if string empty, return all users
     if not user_begin:
@@ -161,18 +166,20 @@ def autofill_users_in_guild(guild_id: int, user_begin: str) -> "list[str]":
     return users
 
 
-def format_highscore_message(group: CategoryGroup) -> str:
+def format_highscore_message(session: Session, group: CategoryGroup) -> str:
     """
     Creates a formatted string for a boss's highscore discord message.
     This formatted string is in discord's code block to ensure monospace text.
     Loops through each category to build the message one place at a time.
 
     Args:
-        group (group): group object that contains the contents of the message.
+        session (Session): the sqlalchemy session used for this function call.
+        group (CategoryGroup): group object that contains the contents of the message.
 
     Returns:
         str: Formatted string for discord message
     """
+
     ret_string = f"**{group.GroupName}**\n```"
 
     stmt = select(Guild).where(Guild.GuildId == group.GuildId)
@@ -291,19 +298,23 @@ def get_time_str(time_in: float) -> str:
     return time.strftime(f"%-M:%S.{milliseconds}", time.gmtime(time_in))
 
 
-async def send_highscore_message(channel: nextcord.TextChannel, group: CategoryGroup) -> nextcord.Message:
+async def send_highscore_message(
+    session: Session, channel: nextcord.TextChannel, group: CategoryGroup
+) -> nextcord.Message:
     """
     Function takes care of checking if a message exists for a group.
     Creates and sends/edits the message.
 
     Args:
+        session (Session): The sqlalchemy session being used for this function call.
         channel (nextcord.TextChannel): Discord channel object where message is sent
         group (CategoryGroup): group to post to the message
 
     Returns:
         nextcord.Message: Message object that was posted with group contents
     """
-    highscore_string = format_highscore_message(group)
+
+    highscore_string = format_highscore_message(session, group)
 
     try:
         message: nextcord.Message = await channel.fetch_message(group.MessageId)
@@ -332,37 +343,38 @@ async def submit_score(
         score (str): Score to submit. Need to convert to correct type.
     """
 
-    stmt = select(Category.IsTimeRecord).where(Category.CategoryId == category_id)
-    is_time_record = session.scalar(stmt)
+    with Session(engine) as session:
+        stmt = select(Category.IsTimeRecord).where(Category.CategoryId == category_id)
+        is_time_record = session.scalar(stmt)
 
-    if is_time_record:
-        minutes = float(score.split(":", maxsplit=1)[0])
-        seconds = float(score.split(":", maxsplit=1)[1])
-        score = (minutes * 60) + seconds
-    else:
-        score = float(score)
+        if is_time_record:
+            minutes = float(score.split(":", maxsplit=1)[0])
+            seconds = float(score.split(":", maxsplit=1)[1])
+            score = (minutes * 60) + seconds
+        else:
+            score = float(score)
 
-    stmt = select(Score).where(Score.UserName == username).where(Score.CategoryId == category_id)
-    existing_score = session.scalar(stmt)
+        stmt = select(Score).where(Score.UserName == username).where(Score.CategoryId == category_id)
+        existing_score = session.scalar(stmt)
 
-    if existing_score:
-        existing_score.Score = score
-    else:
-        score_obj = Score(UserName=username, Score=score, CategoryId=category_id)
-        session.add(score_obj)
-    session.commit()
+        if existing_score:
+            existing_score.Score = score
+        else:
+            score_obj = Score(UserName=username, Score=score, CategoryId=category_id)
+            session.add(score_obj)
+        session.commit()
 
-    stmt = select(CategoryGroup).where(CategoryGroup.GroupId == group_id)
-    group = session.scalar(stmt)
+        stmt = select(CategoryGroup).where(CategoryGroup.GroupId == group_id)
+        group = session.scalar(stmt)
 
-    # edit message
-    channel = interaction.guild.get_channel(group.ChannelId)
+        # edit message
+        channel = interaction.guild.get_channel(group.ChannelId)
 
-    error_response = "Registered Highscores channel does not exist or was never registered."
-    error_response += 'Register with "/register" command.'
-    assert channel is not None, await interaction.send(error_response, ephemeral=True)
+        error_response = "Registered Highscores channel does not exist or was never registered."
+        error_response += 'Register with "/register" command.'
+        assert channel is not None, await interaction.send(error_response, ephemeral=True)
 
-    await send_highscore_message(channel, group)
+        await send_highscore_message(session, channel, group)
 
 
 def add_preset_configuration(guild_id: int, config_str: str) -> None:
@@ -374,19 +386,21 @@ def add_preset_configuration(guild_id: int, config_str: str) -> None:
         guild_id (int): Guild id to add config to
         config_str (str): Config name to add
     """
-    with open(f"example_config/{config_str}.json", encoding="utf-8", mode="r") as file:
-        config = json.load(file)
 
-    for group_name, categorys in config["tables"].items():
-        group_obj = CategoryGroup(GroupName=group_name, GuildId=guild_id)
-        session.add(group_obj)
-        for category_name in categorys:
-            cat_obj = Category(
-                CategoryName=category_name,
-                Size=config["table_size"],
-                IsTimeRecord=config["categories"][category_name]["is_time_record"],
-                IsAscending=config["categories"][category_name]["ascending"],
-            )
-            session.add(cat_obj)
+    with Session(engine) as session:
+        with open(f"example_config/{config_str}.json", encoding="utf-8", mode="r") as file:
+            config = json.load(file)
 
-    session.commit()
+        for group_name, categorys in config["tables"].items():
+            group_obj = CategoryGroup(GroupName=group_name, GuildId=guild_id)
+            session.add(group_obj)
+            for category_name in categorys:
+                cat_obj = Category(
+                    CategoryName=category_name,
+                    Size=config["table_size"],
+                    IsTimeRecord=config["categories"][category_name]["is_time_record"],
+                    IsAscending=config["categories"][category_name]["ascending"],
+                )
+                session.add(cat_obj)
+
+        session.commit()