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backend/alembic/README

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+Generic single-database configuration with an async dbapi.

backend/alembic/env.py

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+
+import asyncio
+from logging.config import fileConfig
+import os
+import sys
+
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import async_engine_from_config
+
+from alembic import context
+
+# Add the parent directory to sys.path
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+
+from app.core.config import settings
+from app.db.session import Base
+from app.models import Project, Ingredient, Scene, Shot
+
+config = context.config
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode."""
+    url = settings.DATABASE_URL
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+def do_run_migrations(connection: Connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+async def run_async_migrations() -> None:
+    """In this scenario we need to create an Engine
+    and associate a connection with the context.
+    """
+
+    configuration = config.get_section(config.config_ini_section, {})
+    configuration["sqlalchemy.url"] = settings.DATABASE_URL
+
+    connectable = async_engine_from_config(
+        configuration,
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+    await connectable.dispose()
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode."""
+    asyncio.run(run_async_migrations())
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

backend/alembic/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

backend/alembic/versions/8c205bad71fb_initial_migration.py

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+"""Initial migration
+
+Revision ID: 8c205bad71fb
+Revises: 
+Create Date: 2026-01-27 13:23:40.208303
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = '8c205bad71fb'
+down_revision: Union[str, Sequence[str], None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('projects',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('name', sa.String(), nullable=False),
+    sa.Column('resolution', sa.String(), nullable=True),
+    sa.Column('aspect_ratio', sa.String(), nullable=True),
+    sa.Column('veo_version', sa.String(), nullable=True),
+    sa.Column('created_at', sa.DateTime(), nullable=True),
+    sa.Column('updated_at', sa.DateTime(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('ingredients',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('project_id', sa.UUID(), nullable=False),
+    sa.Column('name', sa.String(), nullable=False),
+    sa.Column('type', sa.Enum('Character', 'Location', 'Object', 'Style', name='asset_type'), nullable=False),
+    sa.Column('s3_key', sa.String(), nullable=False),
+    sa.Column('s3_bucket', sa.String(), nullable=True),
+    sa.Column('thumbnail_key', sa.String(), nullable=True),
+    sa.Column('metadata', postgresql.JSONB(astext_type=sa.Text()), nullable=True),
+    sa.Column('created_at', sa.DateTime(), nullable=True),
+    sa.ForeignKeyConstraint(['project_id'], ['projects.id'], ondelete='CASCADE'),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('scenes',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('project_id', sa.UUID(), nullable=False),
+    sa.Column('slugline', sa.String(), nullable=False),
+    sa.Column('raw_content', sa.Text(), nullable=True),
+    sa.Column('sequence_number', sa.Integer(), nullable=False),
+    sa.Column('created_at', sa.DateTime(), nullable=True),
+    sa.ForeignKeyConstraint(['project_id'], ['projects.id'], ondelete='CASCADE'),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('shots',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('scene_id', sa.UUID(), nullable=False),
+    sa.Column('description', sa.Text(), nullable=False),
+    sa.Column('duration', sa.Float(), nullable=True),
+    sa.Column('sequence_number', sa.Integer(), nullable=True),
+    sa.Column('assigned_ingredients', postgresql.JSONB(astext_type=sa.Text()), nullable=True),
+    sa.Column('llm_context_cache', sa.Text(), nullable=True),
+    sa.Column('veo_json_payload', postgresql.JSONB(astext_type=sa.Text()), nullable=True),
+    sa.Column('status', sa.String(), nullable=True),
+    sa.Column('updated_at', sa.DateTime(), nullable=True),
+    sa.ForeignKeyConstraint(['scene_id'], ['scenes.id'], ondelete='CASCADE'),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('shots')
+    op.drop_table('scenes')
+    op.drop_table('ingredients')
+    op.drop_table('projects')
+    # ### end Alembic commands ###