feat(db): incorporate feedback

invokeai/app/api/dependencies.py

@@ -70,9 +70,10 @@ class ApiDependencies:
         logger.debug(f"Internet connectivity is {config.internet_available}")
 
         output_folder = config.output_path
+        image_files = DiskImageFileStorage(f"{output_folder}/images")
 
         db = SqliteDatabase(config, logger)
-        migrator = SQLiteMigrator(conn=db.conn, database=db.database, lock=db.lock, logger=logger)
+        migrator = SQLiteMigrator(db=db, image_files=image_files)
         migrator.register_migration(migration_1)
         migrator.register_migration(migration_2)
         migrator.run_migrations()
@@ -87,7 +88,6 @@ class ApiDependencies:
         events = FastAPIEventService(event_handler_id)
         graph_execution_manager = SqliteItemStorage[GraphExecutionState](db=db, table_name="graph_executions")
         graph_library = SqliteItemStorage[LibraryGraph](db=db, table_name="graphs")
-        image_files = DiskImageFileStorage(f"{output_folder}/images")
         image_records = SqliteImageRecordStorage(db=db)
         images = ImageService()
         invocation_cache = MemoryInvocationCache(max_cache_size=config.node_cache_size)

invokeai/app/services/shared/sqlite/migrations/migration_1.py

@@ -1,11 +1,14 @@
 import sqlite3
 
+from invokeai.app.services.image_files.image_files_base import ImageFileStorageBase
+from invokeai.app.services.shared.sqlite.sqlite_database import SqliteDatabase
 from invokeai.app.services.shared.sqlite.sqlite_migrator import Migration
 
 
-def _migrate(cursor: sqlite3.Cursor) -> None:
+def _migrate(db: SqliteDatabase, image_files: ImageFileStorageBase) -> None:
     """Migration callback for database version 1."""
 
+    cursor = db.conn.cursor()
     _create_board_images(cursor)
     _create_boards(cursor)
     _create_images(cursor)
@@ -350,7 +353,11 @@ def _create_workflows(cursor: sqlite3.Cursor) -> None:
         cursor.execute(stmt)
 
 
-migration_1 = Migration(db_version=1, app_version="3.4.0", migrate=_migrate)
+migration_1 = Migration(
+    from_version=0,
+    to_version=1,
+    migrate=_migrate,
+)
 """
 Database version 1 (initial state).
 

invokeai/app/services/shared/sqlite/migrations/migration_2.py

@@ -1,39 +1,55 @@
 import sqlite3
+from logging import Logger
 
+from tqdm import tqdm
+
+from invokeai.app.services.image_files.image_files_base import ImageFileStorageBase
+from invokeai.app.services.shared.sqlite.sqlite_database import SqliteDatabase
 from invokeai.app.services.shared.sqlite.sqlite_migrator import Migration
 
 
-def _migrate(cursor: sqlite3.Cursor) -> None:
+def _migrate(db: SqliteDatabase, image_files: ImageFileStorageBase) -> None:
     """Migration callback for database version 2."""
 
+    cursor = db.conn.cursor()
     _add_images_has_workflow(cursor)
     _add_session_queue_workflow(cursor)
     _drop_old_workflow_tables(cursor)
     _add_workflow_library(cursor)
     _drop_model_manager_metadata(cursor)
+    _migrate_embedded_workflows(cursor=cursor, image_files=image_files, logger=db._logger)
 
 
 def _add_images_has_workflow(cursor: sqlite3.Cursor) -> None:
     """Add the `has_workflow` column to `images` table."""
-    cursor.execute("ALTER TABLE images ADD COLUMN has_workflow BOOLEAN DEFAULT FALSE;")
+    cursor.execute("PRAGMA table_info(images)")
+    columns = [column[1] for column in cursor.fetchall()]
+
+    if "has_workflow" not in columns:
+        cursor.execute("ALTER TABLE images ADD COLUMN has_workflow BOOLEAN DEFAULT FALSE;")
 
 
 def _add_session_queue_workflow(cursor: sqlite3.Cursor) -> None:
     """Add the `workflow` column to `session_queue` table."""
-    cursor.execute("ALTER TABLE session_queue ADD COLUMN workflow TEXT;")
+
+    cursor.execute("PRAGMA table_info(session_queue)")
+    columns = [column[1] for column in cursor.fetchall()]
+
+    if "workflow" not in columns:
+        cursor.execute("ALTER TABLE session_queue ADD COLUMN workflow TEXT;")
 
 
 def _drop_old_workflow_tables(cursor: sqlite3.Cursor) -> None:
     """Drops the `workflows` and `workflow_images` tables."""
-    cursor.execute("DROP TABLE workflow_images;")
+    cursor.execute("DROP TABLE IF EXISTS workflow_images;")
-    cursor.execute("DROP TABLE workflows;")
+    cursor.execute("DROP TABLE IF EXISTS workflows;")
 
 
 def _add_workflow_library(cursor: sqlite3.Cursor) -> None:
     """Adds the `workflow_library` table and drops the `workflows` and `workflow_images` tables."""
     tables = [
         """--sql
-        CREATE TABLE workflow_library (
+        CREATE TABLE IF NOT EXISTS workflow_library (
             workflow_id TEXT NOT NULL PRIMARY KEY,
             workflow TEXT NOT NULL,
             created_at DATETIME NOT NULL DEFAULT(STRFTIME('%Y-%m-%d %H:%M:%f', 'NOW')),
@@ -50,17 +66,17 @@ def _add_workflow_library(cursor: sqlite3.Cursor) -> None:
     ]
 
     indices = [
-        "CREATE INDEX idx_workflow_library_created_at ON workflow_library(created_at);",
+        "CREATE INDEX IF NOT EXISTS idx_workflow_library_created_at ON workflow_library(created_at);",
-        "CREATE INDEX idx_workflow_library_updated_at ON workflow_library(updated_at);",
+        "CREATE INDEX IF NOT EXISTS idx_workflow_library_updated_at ON workflow_library(updated_at);",
-        "CREATE INDEX idx_workflow_library_opened_at ON workflow_library(opened_at);",
+        "CREATE INDEX IF NOT EXISTS idx_workflow_library_opened_at ON workflow_library(opened_at);",
-        "CREATE INDEX idx_workflow_library_category ON workflow_library(category);",
+        "CREATE INDEX IF NOT EXISTS idx_workflow_library_category ON workflow_library(category);",
-        "CREATE INDEX idx_workflow_library_name ON workflow_library(name);",
+        "CREATE INDEX IF NOT EXISTS idx_workflow_library_name ON workflow_library(name);",
-        "CREATE INDEX idx_workflow_library_description ON workflow_library(description);",
+        "CREATE INDEX IF NOT EXISTS idx_workflow_library_description ON workflow_library(description);",
     ]
 
     triggers = [
         """--sql
-        CREATE TRIGGER tg_workflow_library_updated_at
+        CREATE TRIGGER IF NOT EXISTS tg_workflow_library_updated_at
         AFTER UPDATE
         ON workflow_library FOR EACH ROW
         BEGIN
@@ -77,12 +93,43 @@ def _add_workflow_library(cursor: sqlite3.Cursor) -> None:
 
 def _drop_model_manager_metadata(cursor: sqlite3.Cursor) -> None:
     """Drops the `model_manager_metadata` table."""
-    cursor.execute("DROP TABLE model_manager_metadata;")
+    cursor.execute("DROP TABLE IF EXISTS model_manager_metadata;")
+
+
+def _migrate_embedded_workflows(cursor: sqlite3.Cursor, image_files: ImageFileStorageBase, logger: Logger) -> None:
+    """
+    In the v3.5.0 release, InvokeAI changed how it handles embedded workflows. The `images` table in
+    the database now has a `has_workflow` column, indicating if an image has a workflow embedded.
+
+    This migrate callbakc checks each image for the presence of an embedded workflow, then updates its entry
+    in the database accordingly.
+    """
+    # Get the total number of images and chunk it into pages
+    cursor.execute("SELECT image_name FROM images")
+    image_names: list[str] = [image[0] for image in cursor.fetchall()]
+    total_image_names = len(image_names)
+
+    if not total_image_names:
+        return
+
+    logger.info(f"Migrating workflows for {total_image_names} images")
+
+    # Migrate the images
+    to_migrate: list[tuple[bool, str]] = []
+    pbar = tqdm(image_names)
+    for idx, image_name in enumerate(pbar):
+        pbar.set_description(f"Checking image {idx + 1}/{total_image_names} for workflow")
+        pil_image = image_files.get(image_name)
+        if "invokeai_workflow" in pil_image.info:
+            to_migrate.append((True, image_name))
+
+    logger.info(f"Adding {len(to_migrate)} embedded workflows to database")
+    cursor.executemany("UPDATE images SET has_workflow = ? WHERE image_name = ?", to_migrate)
 
 
 migration_2 = Migration(
-    db_version=2,
+    from_version=1,
-    app_version="3.5.0",
+    to_version=2,
     migrate=_migrate,
 )
 """
@@ -90,8 +137,10 @@ Database version 2.
 
 Introduced in v3.5.0 for the new workflow library.
 
+Migration:
 - Add `has_workflow` column to `images` table
 - Add `workflow` column to `session_queue` table
 - Drop `workflows` and `workflow_images` tables
 - Add `workflow_library` table
+- Updates `has_workflow` for all images
 """

invokeai/app/services/shared/sqlite/sqlite_database.py

@@ -8,13 +8,15 @@ from invokeai.app.services.shared.sqlite.sqlite_common import sqlite_memory
 
 
 class SqliteDatabase:
-    database: Path | str
+    database: Path | str  # Must declare this here to satisfy type checker
 
     def __init__(self, config: InvokeAIAppConfig, logger: Logger):
         self._logger = logger
         self._config = config
+        self.is_memory = False
         if self._config.use_memory_db:
             self.database = sqlite_memory
+            self.is_memory = True
             logger.info("Using in-memory database")
         else:
             self.database = self._config.db_path

invokeai/app/services/shared/sqlite/sqlite_migrator.py

@@ -1,14 +1,15 @@
 import shutil
 import sqlite3
-import threading
 from datetime import datetime
-from logging import Logger
 from pathlib import Path
 from typing import Callable, Optional, TypeAlias
 
-from invokeai.app.services.shared.sqlite.sqlite_common import sqlite_memory
+from pydantic import BaseModel, Field, model_validator
 
-MigrateCallback: TypeAlias = Callable[[sqlite3.Cursor], None]
+from invokeai.app.services.image_files.image_files_base import ImageFileStorageBase
+from invokeai.app.services.shared.sqlite.sqlite_database import SqliteDatabase
+
+MigrateCallback: TypeAlias = Callable[[SqliteDatabase, ImageFileStorageBase], None]
 
 
 class MigrationError(Exception):
@@ -19,146 +20,186 @@ class MigrationVersionError(ValueError, MigrationError):
     """Raised when a migration version is invalid."""
 
 
-class Migration:
+class Migration(BaseModel):
-    """Represents a migration for a SQLite database.
+    """
+    Represents a migration for a SQLite database.
 
-    :param db_version: The database schema version this migration results in.
+    Migration callbacks will be provided an instance of SqliteDatabase.
-    :param app_version: The app version this migration is introduced in.
+    Migration callbacks should not commit; the migrator will commit the transaction.
-    :param migrate: The callback to run to perform the migration. The callback will be passed a
-    cursor to the database. The migrator will manage locking database access and committing the
-    transaction; the callback should not do either of these things.
     """
 
-    def __init__(
+    from_version: int = Field(ge=0, strict=True, description="The database version on which this migration may be run")
-        self,
+    to_version: int = Field(ge=1, strict=True, description="The database version that results from this migration")
-        db_version: int,
+    migrate: MigrateCallback = Field(description="The callback to run to perform the migration")
-        app_version: str,
+    pre_migrate: list[MigrateCallback] = Field(
-        migrate: MigrateCallback,
+        default=[], description="A list of callbacks to run before the migration"
-    ) -> None:
+    )
-        self.db_version = db_version
+    post_migrate: list[MigrateCallback] = Field(
-        self.app_version = app_version
+        default=[], description="A list of callbacks to run after the migration"
-        self.migrate = migrate
+    )
+
+    @model_validator(mode="after")
+    def validate_to_version(self) -> "Migration":
+        if self.to_version <= self.from_version:
+            raise ValueError("to_version must be greater than from_version")
+        return self
+
+    def __hash__(self) -> int:
+        # Callables are not hashable, so we need to implement our own __hash__ function to use this class in a set.
+        return hash((self.from_version, self.to_version))
+
+
+class MigrationSet:
+    """A set of Migrations. Performs validation during migration registration and provides utility methods."""
+
+    def __init__(self) -> None:
+        self._migrations: set[Migration] = set()
+
+    def register(self, migration: Migration) -> None:
+        """Registers a migration."""
+        if any(m.from_version == migration.from_version for m in self._migrations):
+            raise MigrationVersionError(f"Migration from {migration.from_version} already registered")
+        if any(m.to_version == migration.to_version for m in self._migrations):
+            raise MigrationVersionError(f"Migration to {migration.to_version} already registered")
+        self._migrations.add(migration)
+
+    def get(self, from_version: int) -> Optional[Migration]:
+        """Gets the migration that may be run on the given database version."""
+        # register() ensures that there is only one migration with a given from_version, so this is safe.
+        return next((m for m in self._migrations if m.from_version == from_version), None)
+
+    @property
+    def count(self) -> int:
+        """The count of registered migrations."""
+        return len(self._migrations)
+
+    @property
+    def latest_version(self) -> int:
+        """Gets latest to_version among registered migrations. Returns 0 if there are no migrations registered."""
+        if self.count == 0:
+            return 0
+        return sorted(self._migrations, key=lambda m: m.to_version)[-1].to_version
 
 
 class SQLiteMigrator:
     """
     Manages migrations for a SQLite database.
 
-    :param conn: The database connection.
+    :param db: The SqliteDatabase, representing the database on which to run migrations.
-    :param database: The path to the database file, or ":memory:" for an in-memory database.
+    :param image_files: An instance of ImageFileStorageBase. Migrations may need to access image files.
-    :param lock: A lock to use when accessing the database.
-    :param logger: The logger to use.
 
     Migrations should be registered with :meth:`register_migration`. Migrations will be run in
     order of their version number. If the database is already at the latest version, no migrations
     will be run.
     """
 
-    def __init__(self, conn: sqlite3.Connection, database: Path | str, lock: threading.RLock, logger: Logger) -> None:
+    backup_path: Optional[Path] = None
-        self._logger = logger
+
-        self._conn = conn
+    def __init__(self, db: SqliteDatabase, image_files: ImageFileStorageBase) -> None:
-        self._cursor = self._conn.cursor()
+        self._image_files = image_files
-        self._lock = lock
+        self._db = db
-        self._database = database
+        self._logger = self._db._logger
-        self._migrations: set[Migration] = set()
+        self._config = self._db._config
+        self._cursor = self._db.conn.cursor()
+        self._migrations = MigrationSet()
 
     def register_migration(self, migration: Migration) -> None:
-        """Registers a migration."""
+        """
-        if not isinstance(migration.db_version, int) or migration.db_version < 1:
+        Registers a migration.
-            raise MigrationVersionError(f"Invalid migration version {migration.db_version}")
+        Migration callbacks should not commit any changes to the database; the migrator will commit the transaction.
-        if any(m.db_version == migration.db_version for m in self._migrations):
+        """
-            raise MigrationVersionError(f"Migration version {migration.db_version} already registered")
+        self._migrations.register(migration)
-        self._migrations.add(migration)
+        self._logger.debug(f"Registered migration {migration.from_version} -> {migration.to_version}")
-        self._logger.debug(f"Registered migration {migration.db_version}")
 
     def run_migrations(self) -> None:
         """Migrates the database to the latest version."""
-        with self._lock:
+        with self._db.lock:
             self._create_version_table()
-            sorted_migrations = sorted(self._migrations, key=lambda m: m.db_version)
             current_version = self._get_current_version()
 
-            if len(sorted_migrations) == 0:
+            if self._migrations.count == 0:
                 self._logger.debug("No migrations registered")
                 return
 
-            latest_version = sorted_migrations[-1].db_version
+            latest_version = self._migrations.latest_version
             if current_version == latest_version:
                 self._logger.debug("Database is up to date, no migrations to run")
                 return
 
-            if current_version > latest_version:
-                raise MigrationError(
-                    f"Database version {current_version} is greater than the latest migration version {latest_version}"
-                )
-
             self._logger.info("Database update needed")
 
             # Only make a backup if using a file database (not memory)
-            backup_path: Optional[Path] = None
+            self._backup_db()
-            if isinstance(self._database, Path):
-                backup_path = self._backup_db(self._database)
-            else:
-                self._logger.info("Using in-memory database, skipping backup")
 
-            for migration in sorted_migrations:
+            next_migration = self._migrations.get(from_version=current_version)
+            while next_migration is not None:
                 try:
-                    self._run_migration(migration)
+                    self._run_migration(next_migration)
+                    next_migration = self._migrations.get(self._get_current_version())
                 except MigrationError:
-                    if backup_path is not None:
+                    self._restore_db()
-                        self._logger.error(f" Restoring from {backup_path}")
-                        self._restore_db(backup_path)
                     raise
             self._logger.info("Database updated successfully")
 
     def _run_migration(self, migration: Migration) -> None:
         """Runs a single migration."""
-        with self._lock:
+        with self._db.lock:
-            current_version = self._get_current_version()
             try:
-                if current_version >= migration.db_version:
+                if self._get_current_version() != migration.from_version:
-                    return
+                    raise MigrationError(
-                migration.migrate(self._cursor)
+                        f"Database is at version {self._get_current_version()}, expected {migration.from_version}"
+                    )
+                self._logger.debug(f"Running migration from {migration.from_version} to {migration.to_version}")
+                if migration.pre_migrate:
+                    self._logger.debug(f"Running {len(migration.pre_migrate)} pre-migration callbacks")
+                    for callback in migration.pre_migrate:
+                        callback(self._db, self._image_files)
+                migration.migrate(self._db, self._image_files)
+                self._cursor.execute("INSERT INTO migrations (version) VALUES (?);", (migration.to_version,))
+                if migration.post_migrate:
+                    self._logger.debug(f"Running {len(migration.post_migrate)} post-migration callbacks")
+                    for callback in migration.post_migrate:
+                        callback(self._db, self._image_files)
                 # Migration callbacks only get a cursor; they cannot commit the transaction.
-                self._conn.commit()
+                self._db.conn.commit()
-                self._set_version(db_version=migration.db_version, app_version=migration.app_version)
+                self._logger.debug(
-                self._logger.debug(f"Successfully migrated database from {current_version} to {migration.db_version}")
+                    f"Successfully migrated database from {migration.from_version} to {migration.to_version}"
+                )
             except Exception as e:
-                msg = f"Error migrating database from {current_version} to {migration.db_version}: {e}"
+                msg = f"Error migrating database from {migration.from_version} to {migration.to_version}: {e}"
-                self._conn.rollback()
+                self._db.conn.rollback()
                 self._logger.error(msg)
                 raise MigrationError(msg) from e
 
     def _create_version_table(self) -> None:
         """Creates a version table for the database, if one does not already exist."""
-        with self._lock:
+        with self._db.lock:
             try:
-                self._cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='version';")
+                self._cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='migrations';")
                 if self._cursor.fetchone() is not None:
                     return
                 self._cursor.execute(
                     """--sql
-                    CREATE TABLE IF NOT EXISTS version (
+                    CREATE TABLE migrations (
-                        db_version INTEGER PRIMARY KEY,
+                        version INTEGER PRIMARY KEY,
-                        app_version TEXT NOT NULL,
                         migrated_at DATETIME NOT NULL DEFAULT(STRFTIME('%Y-%m-%d %H:%M:%f', 'NOW'))
                     );
                     """
                 )
-                self._cursor.execute("INSERT INTO version (db_version, app_version) VALUES (?,?);", (0, "0.0.0"))
+                self._cursor.execute("INSERT INTO migrations (version) VALUES (0);")
-                self._conn.commit()
+                self._db.conn.commit()
-                self._logger.debug("Created version table")
+                self._logger.debug("Created migrations table")
             except sqlite3.Error as e:
-                msg = f"Problem creation version table: {e}"
+                msg = f"Problem creating migrations table: {e}"
                 self._logger.error(msg)
-                self._conn.rollback()
+                self._db.conn.rollback()
                 raise MigrationError(msg) from e
 
     def _get_current_version(self) -> int:
         """Gets the current version of the database, or 0 if the version table does not exist."""
-        with self._lock:
+        with self._db.lock:
             try:
-                self._cursor.execute("SELECT MAX(db_version) FROM version;")
+                self._cursor.execute("SELECT MAX(version) FROM migrations;")
                 version = self._cursor.fetchone()[0]
                 if version is None:
                     return 0
@@ -168,43 +209,42 @@ class SQLiteMigrator:
                     return 0
                 raise
 
-    def _set_version(self, db_version: int, app_version: str) -> None:
+    def _backup_db(self) -> None:
-        """Adds a version entry to the table's version table."""
-        with self._lock:
-            try:
-                self._cursor.execute(
-                    "INSERT INTO version (db_version, app_version) VALUES (?,?);", (db_version, app_version)
-                )
-                self._conn.commit()
-            except sqlite3.Error as e:
-                msg = f"Problem setting database version: {e}"
-                self._logger.error(msg)
-                self._conn.rollback()
-                raise MigrationError(msg) from e
-
-    def _backup_db(self, db_path: Path | str) -> Path:
         """Backs up the databse, returning the path to the backup file."""
-        if db_path == sqlite_memory:
+        if self._db.is_memory:
-            raise MigrationError("Cannot back up memory database")
+            self._logger.debug("Using memory database, skipping backup")
-        if not isinstance(db_path, Path):
+        # Sanity check!
-            raise MigrationError(f'Database path must be "{sqlite_memory}" or a Path')
+        if not isinstance(self._db.database, Path):
-        with self._lock:
+            raise MigrationError(f"Database path must be a Path, got {self._db.database} ({type(self._db.database)})")
+        with self._db.lock:
             timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
-            backup_path = db_path.parent / f"{db_path.stem}_{timestamp}.db"
+            backup_path = self._db.database.parent / f"{self._db.database.stem}_{timestamp}.db"
             self._logger.info(f"Backing up database to {backup_path}")
+
+            # Use SQLite's built in backup capabilities so we don't need to worry about locking and such.
             backup_conn = sqlite3.connect(backup_path)
             with backup_conn:
-                self._conn.backup(backup_conn)
+                self._db.conn.backup(backup_conn)
             backup_conn.close()
-            return backup_path
 
-    def _restore_db(self, backup_path: Path) -> None:
+            # Sanity check!
+            if not backup_path.is_file():
+                raise MigrationError("Unable to back up database")
+            self.backup_path = backup_path
+
+    def _restore_db(
+        self,
+    ) -> None:
         """Restores the database from a backup file, unless the database is a memory database."""
-        if self._database == sqlite_memory:
+        # We don't need to restore a memory database.
+        if self._db.is_memory:
             return
-        with self._lock:
+
-            self._logger.info(f"Restoring database from {backup_path}")
+        with self._db.lock:
-            self._conn.close()
+            self._logger.info(f"Restoring database from {self.backup_path}")
-            if not Path(backup_path).is_file():
+            self._db.conn.close()
-                raise FileNotFoundError(f"Backup file {backup_path} does not exist")
+            if self.backup_path is None:
-            shutil.copy2(backup_path, self._database)
+                raise FileNotFoundError("No backup path set")
+            if not Path(self.backup_path).is_file():
+                raise FileNotFoundError(f"Backup file {self.backup_path} does not exist")
+            shutil.copy2(self.backup_path, self._db.database)

invokeai/backend/util/migrate_image_workflows.py

@@ -1,84 +0,0 @@
-import sqlite3
-from datetime import datetime
-from pathlib import Path
-
-from PIL import Image
-from tqdm import tqdm
-
-from invokeai.app.services.config.config_default import InvokeAIAppConfig
-
-
-def migrate_image_workflows(output_path: Path, database: Path, page_size=100):
-    """
-    In the v3.5.0 release, InvokeAI changed how it handles image workflows. The `images` table in
-    the database now has a `has_workflow` column, indicating if an image has a workflow embedded.
-
-    This script checks each image for the presence of an embedded workflow, then updates its entry
-    in the database accordingly.
-
-    1) Check if the database is updated to support image workflows. Aborts if it doesn't have the
-    `has_workflow` column yet.
-    2) Backs up the database.
-    3) Opens each image in the `images` table via PIL
-    4) Checks if the `"invokeai_workflow"` attribute its in the image's embedded metadata, indicating
-    that it has a workflow.
-    5) If it does, updates the `has_workflow` column for that image to `TRUE`.
-
-    If there are any problems, the script immediately aborts. Because the processing happens in chunks,
-    if there is a problem, it is suggested that you restore the database from the backup and try again.
-    """
-    output_path = output_path
-    database = database
-    conn = sqlite3.connect(database)
-    cursor = conn.cursor()
-
-    # We can only migrate if the `images` table has the `has_workflow` column
-    cursor.execute("PRAGMA table_info(images)")
-    columns = [column[1] for column in cursor.fetchall()]
-    if "has_workflow" not in columns:
-        raise Exception("Database needs to be updated to support image workflows")
-
-    # Back up the database before we start
-    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
-    backup_path = database.parent / f"{database.stem}_migrate-image-workflows_{timestamp}.db"
-    print(f"Backing up database to {backup_path}")
-    backup_conn = sqlite3.connect(backup_path)
-    with backup_conn:
-        conn.backup(backup_conn)
-    backup_conn.close()
-
-    # Get the total number of images and chunk it into pages
-    cursor.execute("SELECT COUNT(*) FROM images")
-    total_images = cursor.fetchone()[0]
-    total_pages = (total_images + page_size - 1) // page_size
-    print(f"Processing {total_images} images in chunks of {page_size} images...")
-
-    # Migrate the images
-    migrated_count = 0
-    pbar = tqdm(range(total_pages))
-    for page in pbar:
-        pbar.set_description(f"Migrating page {page + 1}/{total_pages}")
-        offset = page * page_size
-        cursor.execute("SELECT image_name FROM images LIMIT ? OFFSET ?", (page_size, offset))
-        images = cursor.fetchall()
-        for image_name in images:
-            image_path = output_path / "images" / image_name[0]
-            with Image.open(image_path) as img:
-                if "invokeai_workflow" in img.info:
-                    cursor.execute("UPDATE images SET has_workflow = TRUE WHERE image_name = ?", (image_name[0],))
-                    migrated_count += 1
-        conn.commit()
-    conn.close()
-
-    print(f"Migrated workflows for {migrated_count} images.")
-
-
-if __name__ == "__main__":
-    config = InvokeAIAppConfig.get_config()
-    output_path = config.output_path
-    database = config.db_path
-
-    assert output_path is not None
-    assert output_path.exists()
-    assert database.exists()
-    migrate_image_workflows(output_path=output_path, database=database, page_size=100)