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refac: migration

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This commit is contained in:
Timothy J. Baek 2024-10-26 19:01:01 -07:00
parent 53e772df2f
commit 5537b2dc2c
1 changed files with 33 additions and 8 deletions
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41
backend/open_webui/migrations/versions/242a2047eae0_update_chat_table.py
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@ -19,17 +19,41 @@ depends_on = None
def upgrade():
# Step 1: Rename current 'chat' column to 'old_chat'
op.alter_column("chat", "chat", new_column_name="old_chat", existing_type=sa.Text)
conn = op.get_bind()
inspector = sa.inspect(conn)
# Step 2: Add new 'chat' column of type JSON
op.add_column("chat", sa.Column("chat", sa.JSON(), nullable=True))
columns = inspector.get_columns("chat")
column_dict = {col["name"]: col for col in columns}
chat_column = column_dict.get("chat")
old_chat_exists = "old_chat" in column_dict
if chat_column:
if isinstance(chat_column["type"], sa.Text):
print("Converting 'chat' column to JSON")
if old_chat_exists:
print("Dropping old 'old_chat' column")
op.drop_column("chat", "old_chat")
# Step 1: Rename current 'chat' column to 'old_chat'
print("Renaming 'chat' column to 'old_chat'")
op.alter_column(
"chat", "chat", new_column_name="old_chat", existing_type=sa.Text()
)
# Step 2: Add new 'chat' column of type JSON
print("Adding new 'chat' column of type JSON")
op.add_column("chat", sa.Column("chat", sa.JSON(), nullable=True))
else:
# If the column is already JSON, no need to do anything
pass
# Step 3: Migrate data from 'old_chat' to 'chat'
chat_table = table(
"chat",
sa.Column("id", sa.String, primary_key=True),
sa.Column("old_chat", sa.Text),
sa.Column("id", sa.String(), primary_key=True),
sa.Column("old_chat", sa.Text()),
sa.Column("chat", sa.JSON()),
)
@ -50,6 +74,7 @@ def upgrade():
)
# Step 4: Drop 'old_chat' column
print("Dropping 'old_chat' column")
op.drop_column("chat", "old_chat")
@ -60,7 +85,7 @@ def downgrade():
# Step 2: Convert 'chat' JSON data back to text and store in 'old_chat'
chat_table = table(
"chat",
sa.Column("id", sa.String, primary_key=True),
sa.Column("id", sa.String(), primary_key=True),
sa.Column("chat", sa.JSON()),
sa.Column("old_chat", sa.Text()),
)
@ -79,4 +104,4 @@ def downgrade():
op.drop_column("chat", "chat")
# Step 4: Rename 'old_chat' back to 'chat'
op.alter_column("chat", "old_chat", new_column_name="chat", existing_type=sa.Text)
op.alter_column("chat", "old_chat", new_column_name="chat", existing_type=sa.Text())