App Factory pattern

ref-test/app/admin/views.py

@@ -375,7 +375,7 @@ def _view_entry(id:str=None):
 @admin.route('/certificate/',methods=['POST'])
 @login_required
 def _generate_certificate():
-    from main import db
+    from ..extensions import db
     id = request.get_json()['id']
     entry = Entry.query.filter_by(id=id).first()
     if not entry: return jsonify({'error': 'Invalid entry ID.'}), 404