generate new migration / fix migration files

surfsense_backend/alembic/versions/11_add_llm_config_table_and_relationships.py

@@ -21,18 +21,30 @@ depends_on: Union[str, Sequence[str], None] = None
 def upgrade() -> None:
     """Upgrade schema - add LiteLLMProvider enum, LLMConfig table and user LLM preferences."""
 
-    # Check if enum type exists and create if it doesn't
+    # Create enum only if not exists
     op.execute("""
         DO $$
         BEGIN
             IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'litellmprovider') THEN
-                CREATE TYPE litellmprovider AS ENUM ('OPENAI', 'ANTHROPIC', 'GROQ', 'COHERE', 'HUGGINGFACE', 'AZURE_OPENAI', 'GOOGLE', 'AWS_BEDROCK', 'OLLAMA', 'MISTRAL', 'TOGETHER_AI', 'REPLICATE', 'PALM', 'VERTEX_AI', 'ANYSCALE', 'PERPLEXITY', 'DEEPINFRA', 'AI21', 'NLPCLOUD', 'ALEPH_ALPHA', 'PETALS', 'CUSTOM');
+                CREATE TYPE litellmprovider AS ENUM (
+                    'OPENAI', 'ANTHROPIC', 'GROQ', 'COHERE', 'HUGGINGFACE',
+                    'AZURE_OPENAI', 'GOOGLE', 'AWS_BEDROCK', 'OLLAMA', 'MISTRAL',
+                    'TOGETHER_AI', 'REPLICATE', 'PALM', 'VERTEX_AI', 'ANYSCALE',
+                    'PERPLEXITY', 'DEEPINFRA', 'AI21', 'NLPCLOUD', 'ALEPH_ALPHA',
+                    'PETALS', 'CUSTOM'
+                );
             END IF;
         END$$;
     """)
 
-    # Create llm_configs table using raw SQL to avoid enum creation conflicts
+    # Create llm_configs table only if it doesn't already exist
     op.execute("""
+        DO $$
+        BEGIN
+            IF NOT EXISTS (
+                SELECT FROM information_schema.tables 
+                WHERE table_name = 'llm_configs'
+            ) THEN
                 CREATE TABLE llm_configs (
                     id SERIAL PRIMARY KEY,
                     created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
@@ -44,23 +56,61 @@ def upgrade() -> None:
                     api_base VARCHAR(500),
                     litellm_params JSONB,
                     user_id UUID NOT NULL REFERENCES "user"(id) ON DELETE CASCADE
-        )
+                );
+            END IF;
+        END$$;
     """)
 
-    # Create indexes
+    # Create indexes if they don't exist
-    op.create_index(op.f('ix_llm_configs_id'), 'llm_configs', ['id'], unique=False)
+    op.execute("""
-    op.create_index(op.f('ix_llm_configs_created_at'), 'llm_configs', ['created_at'], unique=False)
+        DO $$
-    op.create_index(op.f('ix_llm_configs_name'), 'llm_configs', ['name'], unique=False)
+        BEGIN
+            IF NOT EXISTS (
+                SELECT 1 FROM pg_indexes 
+                WHERE tablename = 'llm_configs' AND indexname = 'ix_llm_configs_id'
+            ) THEN
+                CREATE INDEX ix_llm_configs_id ON llm_configs(id);
+            END IF;
 
-    # Add LLM preference columns to user table
+            IF NOT EXISTS (
-    op.add_column('user', sa.Column('long_context_llm_id', sa.Integer(), nullable=True))
+                SELECT 1 FROM pg_indexes 
-    op.add_column('user', sa.Column('fast_llm_id', sa.Integer(), nullable=True))
+                WHERE tablename = 'llm_configs' AND indexname = 'ix_llm_configs_created_at'
-    op.add_column('user', sa.Column('strategic_llm_id', sa.Integer(), nullable=True))
+            ) THEN
+                CREATE INDEX ix_llm_configs_created_at ON llm_configs(created_at);
+            END IF;
 
-    # Create foreign key constraints for LLM preferences
+            IF NOT EXISTS (
-    op.create_foreign_key(op.f('fk_user_long_context_llm_id_llm_configs'), 'user', 'llm_configs', ['long_context_llm_id'], ['id'], ondelete='SET NULL')
+                SELECT 1 FROM pg_indexes 
-    op.create_foreign_key(op.f('fk_user_fast_llm_id_llm_configs'), 'user', 'llm_configs', ['fast_llm_id'], ['id'], ondelete='SET NULL')
+                WHERE tablename = 'llm_configs' AND indexname = 'ix_llm_configs_name'
-    op.create_foreign_key(op.f('fk_user_strategic_llm_id_llm_configs'), 'user', 'llm_configs', ['strategic_llm_id'], ['id'], ondelete='SET NULL')
+            ) THEN
+                CREATE INDEX ix_llm_configs_name ON llm_configs(name);
+            END IF;
+        END$$;
+    """)
+
+    # Safely add columns to user table
+    bind = op.get_bind()
+    inspector = sa.inspect(bind)
+    existing_columns = [col["name"] for col in inspector.get_columns("user")]
+
+    with op.batch_alter_table('user') as batch_op:
+        if 'long_context_llm_id' not in existing_columns:
+            batch_op.add_column(sa.Column('long_context_llm_id', sa.Integer(), nullable=True))
+            batch_op.create_foreign_key(op.f('fk_user_long_context_llm_id_llm_configs'),
+                                        'llm_configs', ['long_context_llm_id'], ['id'],
+                                        ondelete='SET NULL')
+
+        if 'fast_llm_id' not in existing_columns:
+            batch_op.add_column(sa.Column('fast_llm_id', sa.Integer(), nullable=True))
+            batch_op.create_foreign_key(op.f('fk_user_fast_llm_id_llm_configs'),
+                                        'llm_configs', ['fast_llm_id'], ['id'],
+                                        ondelete='SET NULL')
+
+        if 'strategic_llm_id' not in existing_columns:
+            batch_op.add_column(sa.Column('strategic_llm_id', sa.Integer(), nullable=True))
+            batch_op.create_foreign_key(op.f('fk_user_strategic_llm_id_llm_configs'),
+                                        'llm_configs', ['strategic_llm_id'], ['id'],
+                                        ondelete='SET NULL')
 
 
 def downgrade() -> None:

surfsense_backend/alembic/versions/12_add_logs_table.py

@@ -8,8 +8,8 @@ from typing import Sequence, Union
 
 from alembic import op
 import sqlalchemy as sa
-from sqlalchemy.dialects.postgresql import JSON
+from sqlalchemy.dialects.postgresql import JSONB
-
+from sqlalchemy import inspect
 
 # revision identifiers, used by Alembic.
 revision: str = "12"
@@ -21,47 +21,67 @@ depends_on: Union[str, Sequence[str], None] = None
 def upgrade() -> None:
     """Upgrade schema - add LogLevel and LogStatus enums and logs table."""
 
-    # Create LogLevel enum
+    # Create LogLevel enum if it doesn't exist
     op.execute("""
-        CREATE TYPE loglevel AS ENUM ('DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL')
+        DO $$
+        BEGIN
+            IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'loglevel') THEN
+                CREATE TYPE loglevel AS ENUM ('DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL');
+            END IF;
+        END$$;
     """)
 
-    # Create LogStatus enum  
+    # Create LogStatus enum if it doesn't exist
     op.execute("""
-        CREATE TYPE logstatus AS ENUM ('IN_PROGRESS', 'SUCCESS', 'FAILED')
+        DO $$
+        BEGIN
+            IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'logstatus') THEN
+                CREATE TYPE logstatus AS ENUM ('IN_PROGRESS', 'SUCCESS', 'FAILED');
+            END IF;
+        END$$;
     """)
 
-    # Create logs table
+    # Create logs table if it doesn't exist
     op.execute("""
-        CREATE TABLE logs (
+        CREATE TABLE IF NOT EXISTS logs (
             id SERIAL PRIMARY KEY,
-            created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
+            created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
             level loglevel NOT NULL,
             status logstatus NOT NULL,
             message TEXT NOT NULL,
             source VARCHAR(200),
             log_metadata JSONB DEFAULT '{}',
             search_space_id INTEGER NOT NULL REFERENCES searchspaces(id) ON DELETE CASCADE
-        )
+        );
     """)
 
-    # Create indexes
+    # Get existing indexes
-    op.create_index(op.f('ix_logs_id'), 'logs', ['id'], unique=False)
+    conn = op.get_bind()
-    op.create_index(op.f('ix_logs_created_at'), 'logs', ['created_at'], unique=False)
+    inspector = inspect(conn)
-    op.create_index(op.f('ix_logs_level'), 'logs', ['level'], unique=False)
+    existing_indexes = [idx['name'] for idx in inspector.get_indexes('logs')]
-    op.create_index(op.f('ix_logs_status'), 'logs', ['status'], unique=False)
+
-    op.create_index(op.f('ix_logs_source'), 'logs', ['source'], unique=False)
+    # Create indexes only if they don't already exist
+    if 'ix_logs_id' not in existing_indexes:
+        op.create_index('ix_logs_id', 'logs', ['id'])
+    if 'ix_logs_created_at' not in existing_indexes:
+        op.create_index('ix_logs_created_at', 'logs', ['created_at'])
+    if 'ix_logs_level' not in existing_indexes:
+        op.create_index('ix_logs_level', 'logs', ['level'])
+    if 'ix_logs_status' not in existing_indexes:
+        op.create_index('ix_logs_status', 'logs', ['status'])
+    if 'ix_logs_source' not in existing_indexes:
+        op.create_index('ix_logs_source', 'logs', ['source'])
 
 
 def downgrade() -> None:
     """Downgrade schema - remove logs table and enums."""
 
     # Drop indexes
-    op.drop_index(op.f('ix_logs_source'), table_name='logs')
+    op.drop_index('ix_logs_source', table_name='logs')
-    op.drop_index(op.f('ix_logs_status'), table_name='logs')
+    op.drop_index('ix_logs_status', table_name='logs')
-    op.drop_index(op.f('ix_logs_level'), table_name='logs')
+    op.drop_index('ix_logs_level', table_name='logs')
-    op.drop_index(op.f('ix_logs_created_at'), table_name='logs')
+    op.drop_index('ix_logs_created_at', table_name='logs')
-    op.drop_index(op.f('ix_logs_id'), table_name='logs')
+    op.drop_index('ix_logs_id', table_name='logs')
 
     # Drop logs table
     op.drop_table('logs')

surfsense_backend/alembic/versions/13_add_jira_connector_enums.py

@@ -0,0 +1,57 @@
+"""Add JIRA_CONNECTOR to enums
+
+Revision ID: 13
+Revises: 12
+"""
+
+from typing import Sequence, Union
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = '13'
+down_revision: Union[str, None] = '12'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Safely add 'JIRA_CONNECTOR' to enum types if missing."""
+
+    # Add to searchsourceconnectortype enum
+    op.execute("""
+    DO $$
+    BEGIN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_type t
+            JOIN pg_enum e ON t.oid = e.enumtypid
+            WHERE t.typname = 'searchsourceconnectortype' AND e.enumlabel = 'JIRA_CONNECTOR'
+        ) THEN
+            ALTER TYPE searchsourceconnectortype ADD VALUE 'JIRA_CONNECTOR';
+        END IF;
+    END
+    $$;
+    """)
+
+    # Add to documenttype enum
+    op.execute("""
+    DO $$
+    BEGIN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_type t
+            JOIN pg_enum e ON t.oid = e.enumtypid
+            WHERE t.typname = 'documenttype' AND e.enumlabel = 'JIRA_CONNECTOR'
+        ) THEN
+            ALTER TYPE documenttype ADD VALUE 'JIRA_CONNECTOR';
+        END IF;
+    END
+    $$;
+    """)
+
+
+def downgrade() -> None:
+    """
+    Downgrade logic not implemented since PostgreSQL
+    does not support removing enum values.
+    """
+    pass

surfsense_backend/alembic/versions/1_add_github_connector_enum.py

@@ -24,7 +24,22 @@ def upgrade() -> None:
     
     # Manually add the command to add the enum value
     # Note: It's generally better to let autogenerate handle this, but we're bypassing it
-    op.execute("ALTER TYPE searchsourceconnectortype ADD VALUE 'GITHUB_CONNECTOR'")
+    op.execute("""
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1
+        FROM pg_enum
+        WHERE enumlabel = 'GITHUB_CONNECTOR'
+        AND enumtypid = (
+            SELECT oid FROM pg_type WHERE typname = 'searchsourceconnectortype'
+        )
+    ) THEN
+        ALTER TYPE searchsourceconnectortype ADD VALUE 'GITHUB_CONNECTOR';
+    END IF;
+END$$;
+""")
+
     
     # Pass for the rest, as autogenerate didn't run to add other schema details
     pass

surfsense_backend/alembic/versions/2_add_linear_connector_enum.py

@@ -18,14 +18,21 @@ depends_on: Union[str, Sequence[str], None] = None
 
 
 def upgrade() -> None:
-    # ### commands auto generated by Alembic - please adjust! ###
+    op.execute("""
-    
+    DO $$
-    # Manually add the command to add the enum value
+    BEGIN
-    op.execute("ALTER TYPE searchsourceconnectortype ADD VALUE 'LINEAR_CONNECTOR'")
+        IF NOT EXISTS (
-    
+            SELECT 1 FROM pg_enum
-    # Pass for the rest, as autogenerate didn't run to add other schema details
+            WHERE enumlabel = 'LINEAR_CONNECTOR'
-    pass
+            AND enumtypid = (
-    # ### end Alembic commands ###
+                SELECT oid FROM pg_type WHERE typname = 'searchsourceconnectortype'
+            )
+        ) THEN
+            ALTER TYPE searchsourceconnectortype ADD VALUE 'LINEAR_CONNECTOR';
+        END IF;
+    END$$;
+    """)
+#
 
 
 def downgrade() -> None:

surfsense_backend/alembic/versions/3_add_linear_connector_to_documenttype_.py

@@ -22,7 +22,21 @@ NEW_VALUE = 'LINEAR_CONNECTOR'
 
 def upgrade() -> None:
     """Upgrade schema."""
-    op.execute(f"ALTER TYPE {ENUM_NAME} ADD VALUE '{NEW_VALUE}'")
+    op.execute(f"""
+    DO $$
+    BEGIN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_enum
+            WHERE enumlabel = '{NEW_VALUE}'
+            AND enumtypid = (
+                SELECT oid FROM pg_type WHERE typname = '{ENUM_NAME}'
+            )
+        ) THEN
+            ALTER TYPE {ENUM_NAME} ADD VALUE '{NEW_VALUE}';
+        END IF;
+    END$$;
+    """)
+
         
 
 # Warning: This will delete all rows with the new value

surfsense_backend/alembic/versions/4_add_linkup_api_enum.py

@@ -18,14 +18,24 @@ depends_on: Union[str, Sequence[str], None] = None
 
 
 def upgrade() -> None:
-    # ### commands auto generated by Alembic - please adjust! ###
+    ENUM_NAME = 'searchsourceconnectortype'
+    NEW_VALUE = 'LINKUP_API'
 
-    # Manually add the command to add the enum value
+    op.execute(f"""
-    op.execute("ALTER TYPE searchsourceconnectortype ADD VALUE 'LINKUP_API'")
+    DO $$
+    BEGIN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_enum
+            WHERE enumlabel = '{NEW_VALUE}'
+            AND enumtypid = (
+                SELECT oid FROM pg_type WHERE typname = '{ENUM_NAME}'
+            )
+        ) THEN
+            ALTER TYPE {ENUM_NAME} ADD VALUE '{NEW_VALUE}';
+        END IF;
+    END$$;
+    """)
 
-    # Pass for the rest, as autogenerate didn't run to add other schema details
-    pass
-    # ### end Alembic commands ###
 
 
 def downgrade() -> None:

surfsense_backend/alembic/versions/6_change_podcast_content_to_transcript.py

@@ -9,6 +9,7 @@ from typing import Sequence, Union
 from alembic import op
 import sqlalchemy as sa
 from sqlalchemy.dialects.postgresql import JSON
+from sqlalchemy import inspect
 
 
 # revision identifiers, used by Alembic.
@@ -17,20 +18,27 @@ down_revision: Union[str, None] = '5'
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 
-
 def upgrade() -> None:
-    # Drop the old column and create a new one with the new name and type
+    bind = op.get_bind()
-    # We need to do this because PostgreSQL doesn't support direct column renames with type changes
+    inspector = inspect(bind)
+
+    columns = [col["name"] for col in inspector.get_columns("podcasts")]
+    if "podcast_transcript" not in columns:
         op.add_column('podcasts', sa.Column('podcast_transcript', JSON, nullable=False, server_default='{}'))
 
         # Copy data from old column to new column
-    # Convert text to JSON by storing it as a JSON string value
+        op.execute("""
-    op.execute("UPDATE podcasts SET podcast_transcript = jsonb_build_object('text', podcast_content) WHERE podcast_content != ''")
+            UPDATE podcasts 
+            SET podcast_transcript = jsonb_build_object('text', podcast_content) 
+            WHERE podcast_content != ''
+        """)
 
-    # Drop the old column
+    # Drop the old column only if it exists
+    if "podcast_content" in columns:
         op.drop_column('podcasts', 'podcast_content')
 
 
+
 def downgrade() -> None:
     # Add back the original column
     op.add_column('podcasts', sa.Column('podcast_content', sa.Text(), nullable=False, server_default=''))

surfsense_backend/alembic/versions/7_remove_is_generated_column.py

@@ -8,6 +8,7 @@ from typing import Sequence, Union
 
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy import inspect
 
 
 # revision identifiers, used by Alembic.
@@ -16,12 +17,18 @@ down_revision: Union[str, None] = '6'
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 
-
 def upgrade() -> None:
-    # Drop the is_generated column
+    # Get the current database connection
+    bind = op.get_bind()
+    inspector = inspect(bind)
+
+    # Check if the column exists before attempting to drop it
+    columns = [col["name"] for col in inspector.get_columns("podcasts")]
+    if "is_generated" in columns:
         op.drop_column('podcasts', 'is_generated')
 
 
+
 def downgrade() -> None:
     # Add back the is_generated column with its original constraints
     op.add_column('podcasts', sa.Column('is_generated', sa.Boolean(), nullable=False, server_default='false')) 

surfsense_backend/alembic/versions/8_add_content_hash_to_documents.py

@@ -4,9 +4,9 @@ Revision ID: 8
 Revises: 7
 """
 from typing import Sequence, Union
-
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy import inspect
 
 
 # revision identifiers, used by Alembic.
@@ -17,19 +17,21 @@ depends_on: Union[str, Sequence[str], None] = None
 
 
 def upgrade() -> None:
-    # Add content_hash column as nullable first to handle existing data
+    bind = op.get_bind()
+    inspector = inspect(bind)
+    columns = [col['name'] for col in inspector.get_columns('documents')]
+
+    # Only add the column if it doesn't already exist
+    if 'content_hash' not in columns:
         op.add_column('documents', sa.Column('content_hash', sa.String(), nullable=True))
 
-    # Update existing documents to generate content hashes
+        # Populate the content_hash column
-    # Using SHA-256 hash of the content column with proper UTF-8 encoding
         op.execute("""
             UPDATE documents 
             SET content_hash = encode(sha256(convert_to(content, 'UTF8')), 'hex')
             WHERE content_hash IS NULL
         """)
 
-    # Handle duplicate content hashes by keeping only the oldest document for each hash
-    # Delete newer documents with duplicate content hashes
         op.execute("""
             DELETE FROM documents 
             WHERE id NOT IN (
@@ -39,18 +41,16 @@ def upgrade() -> None:
             )
         """)
 
-    # Now alter the column to match the model: nullable=False, index=True, unique=True
         op.alter_column('documents', 'content_hash', 
                         existing_type=sa.String(),
                         nullable=False)
         op.create_index(op.f('ix_documents_content_hash'), 'documents', ['content_hash'], unique=False)
         op.create_unique_constraint(op.f('uq_documents_content_hash'), 'documents', ['content_hash'])
+    else:
+        print("Column 'content_hash' already exists. Skipping column creation.")
 
 
 def downgrade() -> None:
-    # Remove constraints and index first
     op.drop_constraint(op.f('uq_documents_content_hash'), 'documents', type_='unique')
     op.drop_index(op.f('ix_documents_content_hash'), table_name='documents')
-    
-    # Remove content_hash column from documents table
     op.drop_column('documents', 'content_hash')

surfsense_backend/alembic/versions/9_add_discord_connector_enum_and_documenttype.py

@@ -24,11 +24,35 @@ DOCUMENT_NEW_VALUE = "DISCORD_CONNECTOR"
 
 
 def upgrade() -> None:
-    """Upgrade schema - add DISCORD_CONNECTOR to connector and document enum."""
+    """Upgrade schema - add DISCORD_CONNECTOR to connector and document enum safely."""
-    # Add DISCORD_CONNECTOR to searchsourceconnectortype
+    # Add DISCORD_CONNECTOR to searchsourceconnectortype only if not exists
-    op.execute(f"ALTER TYPE {CONNECTOR_ENUM} ADD VALUE '{CONNECTOR_NEW_VALUE}'")
+    op.execute(f"""
-    # Add DISCORD_CONNECTOR to documenttype
+        DO $$
-    op.execute(f"ALTER TYPE {DOCUMENT_ENUM} ADD VALUE '{DOCUMENT_NEW_VALUE}'")
+        BEGIN
+            IF NOT EXISTS (
+                SELECT 1 FROM pg_enum
+                WHERE enumlabel = '{CONNECTOR_NEW_VALUE}'
+                AND enumtypid = (SELECT oid FROM pg_type WHERE typname = '{CONNECTOR_ENUM}')
+            ) THEN
+                ALTER TYPE {CONNECTOR_ENUM} ADD VALUE '{CONNECTOR_NEW_VALUE}';
+            END IF;
+        END$$;
+    """)
+
+    # Add DISCORD_CONNECTOR to documenttype only if not exists
+    op.execute(f"""
+        DO $$
+        BEGIN
+            IF NOT EXISTS (
+                SELECT 1 FROM pg_enum
+                WHERE enumlabel = '{DOCUMENT_NEW_VALUE}'
+                AND enumtypid = (SELECT oid FROM pg_type WHERE typname = '{DOCUMENT_ENUM}')
+            ) THEN
+                ALTER TYPE {DOCUMENT_ENUM} ADD VALUE '{DOCUMENT_NEW_VALUE}';
+            END IF;
+        END$$;
+    """)
+
 
 
 def downgrade() -> None:

surfsense_backend/alembic/versions/e55302644c51_add_github_connector_to_documenttype_.py

@@ -1,15 +1,8 @@
-"""Add GITHUB_CONNECTOR to DocumentType enum
-
-Revision ID: e55302644c51
-Revises: 1
-
-"""
 from typing import Sequence, Union
 
 from alembic import op
 import sqlalchemy as sa
 
-
 # revision identifiers, used by Alembic.
 revision: str = 'e55302644c51'
 down_revision: Union[str, None] = '1'
@@ -17,22 +10,30 @@ branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 
 # Define the ENUM type name and the new value
-ENUM_NAME = 'documenttype' # Make sure this matches the name in your DB (usually lowercase class name)
+ENUM_NAME = 'documenttype'
 NEW_VALUE = 'GITHUB_CONNECTOR'
 
 def upgrade() -> None:
     """Upgrade schema."""
-    op.execute(f"ALTER TYPE {ENUM_NAME} ADD VALUE '{NEW_VALUE}'")
+    op.execute(f"""
+    DO $$
+    BEGIN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_enum
+            WHERE enumlabel = '{NEW_VALUE}'
+            AND enumtypid = (
+                SELECT oid FROM pg_type WHERE typname = '{ENUM_NAME}'
+            )
+        ) THEN
+            ALTER TYPE {ENUM_NAME} ADD VALUE '{NEW_VALUE}';
+        END IF;
+    END$$;
+    """)
 
-
-# Warning: This will delete all rows with the new value
 def downgrade() -> None:
     """Downgrade schema - remove GITHUB_CONNECTOR from enum."""
-
-    # The old type name
     old_enum_name = f"{ENUM_NAME}_old"
 
-    # Enum values *before* GITHUB_CONNECTOR was added
     old_values = (
         'EXTENSION',
         'CRAWLED_URL',
@@ -43,27 +44,23 @@ def downgrade() -> None:
     )
     old_values_sql = ", ".join([f"'{v}'" for v in old_values])
 
-    # Table and column names (adjust if different)
     table_name = 'documents'
     column_name = 'document_type'
 
-    # 1. Rename the current enum type
+    # 1. Create the new enum type with the old values
-    op.execute(f"ALTER TYPE {ENUM_NAME} RENAME TO {old_enum_name}")
+    op.execute(f"CREATE TYPE {old_enum_name} AS ENUM({old_values_sql})")
 
-    # 2. Create the new enum type with the old values
+    # 2. Delete rows using the new value
-    op.execute(f"CREATE TYPE {ENUM_NAME} AS ENUM({old_values_sql})")
-
-    # 3. Update the table: 
     op.execute(
         f"DELETE FROM {table_name} WHERE {column_name}::text = '{NEW_VALUE}'"
     )
 
-    # 4. Alter the column to use the new enum type (casting old values)
+    # 3. Alter the column to use the old enum type
     op.execute(
         f"ALTER TABLE {table_name} ALTER COLUMN {column_name} "
-        f"TYPE {ENUM_NAME} USING {column_name}::text::{ENUM_NAME}"
+        f"TYPE {old_enum_name} USING {column_name}::text::{old_enum_name}"
     )
 
-    # 5. Drop the old enum type
+    # 4. Drop the current enum type and rename the old one
-    op.execute(f"DROP TYPE {old_enum_name}")
+    op.execute(f"DROP TYPE {ENUM_NAME}")
-    # ### end Alembic commands ### 
+    op.execute(f"ALTER TYPE {old_enum_name} RENAME TO {ENUM_NAME}")