Warn on invalid model configs in the DB rather than crashing.

docs/contributing/MODEL_MANAGER.md

@@ -408,7 +408,7 @@ config = get_config()
 
 logger = InvokeAILogger.get_logger(config=config)
 db = SqliteDatabase(config.db_path, logger)
-record_store = ModelRecordServiceSQL(db)
+record_store = ModelRecordServiceSQL(db, logger)
 queue = DownloadQueueService()
 queue.start()
 

invokeai/app/api/dependencies.py

@@ -99,7 +99,7 @@ class ApiDependencies:
         model_images_service = ModelImageFileStorageDisk(model_images_folder / "model_images")
         model_manager = ModelManagerService.build_model_manager(
             app_config=configuration,
-            model_record_service=ModelRecordServiceSQL(db=db),
+            model_record_service=ModelRecordServiceSQL(db=db, logger=logger),
             download_queue=download_queue_service,
             events=events,
         )

invokeai/app/services/model_records/model_records_sql.py

@@ -40,11 +40,14 @@ Typical usage:
 """
 
 import json
+import logging
 import sqlite3
 from math import ceil
 from pathlib import Path
 from typing import List, Optional, Union
 
+import pydantic
+
 from invokeai.app.services.model_records.model_records_base import (
     DuplicateModelException,
     ModelRecordChanges,
@@ -67,7 +70,7 @@ from invokeai.backend.model_manager.config import (
 class ModelRecordServiceSQL(ModelRecordServiceBase):
     """Implementation of the ModelConfigStore ABC using a SQL database."""
 
-    def __init__(self, db: SqliteDatabase):
+    def __init__(self, db: SqliteDatabase, logger: logging.Logger):
         """
         Initialize a new object from preexisting sqlite3 connection and threading lock objects.
 
@@ -76,6 +79,7 @@ class ModelRecordServiceSQL(ModelRecordServiceBase):
         super().__init__()
         self._db = db
         self._cursor = db.conn.cursor()
+        self._logger = logger
 
     @property
     def db(self) -> SqliteDatabase:
@@ -291,7 +295,20 @@ class ModelRecordServiceSQL(ModelRecordServiceBase):
                 tuple(bindings),
             )
             result = self._cursor.fetchall()
-            results = [ModelConfigFactory.make_config(json.loads(x[0]), timestamp=x[1]) for x in result]
+
+        # Parse the model configs.
+        results: list[AnyModelConfig] = []
+        for row in result:
+            try:
+                model_config = ModelConfigFactory.make_config(json.loads(row[0]), timestamp=row[1])
+            except pydantic.ValidationError:
+                # We catch this error so that the app can still run if there are invalid model configs in the database.
+                # One reason that an invalid model config might be in the database is if someone had to rollback from a
+                # newer version of the app that added a new model type.
+                self._logger.warning(f"Found an invalid model config in the database. Ignoring this model. ({row[0]})")
+            else:
+                results.append(model_config)
+
         return results
 
     def search_by_path(self, path: Union[str, Path]) -> List[AnyModelConfig]:

tests/app/services/model_records/test_model_records_sql.py

@@ -40,7 +40,7 @@ def store(
     config._root = datadir
     logger = InvokeAILogger.get_logger(config=config)
     db = create_mock_sqlite_database(config, logger)
-    return ModelRecordServiceSQL(db)
+    return ModelRecordServiceSQL(db, logger)
 
 
 def example_ti_config(key: Optional[str] = None) -> TextualInversionFileConfig:

tests/backend/model_manager/model_manager_fixtures.py

@@ -110,7 +110,7 @@ def mm2_installer(
     logger = InvokeAILogger.get_logger()
     db = create_mock_sqlite_database(mm2_app_config, logger)
     events = TestEventService()
-    store = ModelRecordServiceSQL(db)
+    store = ModelRecordServiceSQL(db, logger)
 
     installer = ModelInstallService(
         app_config=mm2_app_config,
@@ -128,7 +128,7 @@ def mm2_installer(
 def mm2_record_store(mm2_app_config: InvokeAIAppConfig) -> ModelRecordServiceBase:
     logger = InvokeAILogger.get_logger(config=mm2_app_config)
     db = create_mock_sqlite_database(mm2_app_config, logger)
-    store = ModelRecordServiceSQL(db)
+    store = ModelRecordServiceSQL(db, logger)
     # add five simple config records to the database
     config1 = VAEDiffusersConfig(
         key="test_config_1",