switched to tagging and added views to support it, in progress for other tagging functions.

app/__init__.py

@@ -5,12 +5,22 @@ from flask_sqlalchemy import SQLAlchemy
 from flask_migrate import Migrate
 from flask_login import LoginManager
 from werkzeug.middleware.proxy_fix import ProxyFix
-
+from sqlalchemy import event
+from sqlalchemy.engine import Engine
+import sqlite3
 
 db = SQLAlchemy()
 migrate = Migrate()
 login_manager = LoginManager()
 
+@event.listens_for(Engine, "connect")
+def set_sqlite_pragma(dbapi_connection, connection_record):
+    # Only apply to SQLite connections
+    if isinstance(dbapi_connection, sqlite3.Connection):
+        cursor = dbapi_connection.cursor()
+        cursor.execute("PRAGMA foreign_keys = ON")
+        cursor.close()
+
 def create_app(config_class='config.Config'):
     app = Flask(__name__)
     app.config.from_object(config_class)