Added support for storing configurations of pgAdmin in an external database. #1832

web/migrations/env.py

@@ -24,8 +24,9 @@ logger = logging.getLogger('alembic.env')
 # from myapp import mymodel
 # target_metadata = mymodel.Base.metadata
 from flask import current_app
-config.set_main_option('sqlalchemy.url',
-                       current_app.config.get('SQLALCHEMY_DATABASE_URI'))
+db_url_escaped = \
+    current_app.config.get('SQLALCHEMY_DATABASE_URI').replace('%', '%%')
+config.set_main_option('sqlalchemy.url', db_url_escaped)
 target_metadata = current_app.extensions['migrate'].db.metadata
 
 # other values from the config, defined by the needs of env.py,
@@ -87,6 +88,7 @@ def run_migrations_online():
     finally:
         connection.close()
 
+
 if context.is_offline_mode():
     run_migrations_offline()
 else: