Explicitly disable SQLALCHEMY_TRACK_MODIFICATIONS

This silences deprecation warnings.
Background: https://stackoverflow.com/a/33790196/770425

Note: This code can be removed once `flask_sqlalchemy` 3.0 ships, or any
release that includes
pallets-eco/flask-sqlalchemy#727.

example/example.py

@@ -17,6 +17,10 @@
 #app.config['DEBUG_TB_HOSTS'] = ('127.0.0.1', '::1' )
 app.config['SECRET_KEY'] = 'asd'
 app.config['DEBUG'] = True
+
+# TODO: This can be removed once flask_sqlalchemy 3.0 ships
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
 app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db'
 db = SQLAlchemy(app)
 

test/basic_app.py

@@ -8,6 +8,9 @@
 app.debug = True
 app.config['SECRET_KEY'] = 'abc123'
 
+# TODO: This can be removed once flask_sqlalchemy 3.0 ships
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
 # make sure these are printable in the config panel
 app.config['BYTES_VALUE'] = b'\x00'
 app.config['UNICODE_VALUE'] = u'\uffff'