Initial public ModelForge release

backend/alembic/env.py

@@ -0,0 +1,76 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config, pool
+
+from alembic import context
+from modelforge_api.persistence.models import Base
+from modelforge_api.settings import get_settings
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+
+def _database_url() -> str:
+    """Where the migration runs, in order of explicitness.
+
+    1. `-x db_url=...` on the command line
+    2. a URL the caller set programmatically, or in alembic.ini
+    3. MODELFORGE_MIGRATION_DATABASE_URL
+    4. MODELFORGE_DATABASE_URL only outside production
+
+    env.py used to overwrite whatever the caller had set with the settings default
+    unconditionally, so both explicit forms were silently discarded. A bootstrap or upgrade
+    rehearsal aimed at an isolated copy would have migrated the deployment's own database while
+    reporting success against the copy.
+    """
+
+    supplied = context.get_x_argument(as_dictionary=True).get("db_url")
+    if supplied:
+        return str(supplied)
+    configured = config.get_main_option("sqlalchemy.url", None)
+    if configured:
+        return configured
+    settings = get_settings()
+    if settings.migration_database_url is not None:
+        return settings.migration_database_url.get_secret_value()
+    if settings.env == "production":
+        raise RuntimeError(
+            "production migrations require MODELFORGE_MIGRATION_DATABASE_URL; the API runtime "
+            "credential is intentionally not a migration credential"
+        )
+    return settings.database_url
+
+
+config.set_main_option("sqlalchemy.url", _database_url())
+target_metadata = Base.metadata
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=config.get_main_option("sqlalchemy.url"),
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+        compare_type=True,
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+    with connectable.connect() as connection:
+        context.configure(connection=connection, target_metadata=target_metadata, compare_type=True)
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()