Use enums where appropriate. This commit includes new migrations that are NOT compatible with older nopaque instances

migrations/env.py

@@ -3,8 +3,7 @@ from __future__ import with_statement
 import logging
 from logging.config import fileConfig
 
-from sqlalchemy import engine_from_config
-from sqlalchemy import pool
+from flask import current_app
 
 from alembic import context
 
@@ -21,10 +20,10 @@ logger = logging.getLogger('alembic.env')
 # for 'autogenerate' support
 # 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').replace('%', '%%'))
+    'sqlalchemy.url',
+    str(current_app.extensions['migrate'].db.get_engine().url).replace(
+        '%', '%%'))
 target_metadata = current_app.extensions['migrate'].db.metadata
 
 # other values from the config, defined by the needs of env.py,
@@ -72,11 +71,7 @@ def run_migrations_online():
                 directives[:] = []
                 logger.info('No changes in schema detected.')
 
-    connectable = engine_from_config(
-        config.get_section(config.config_ini_section),
-        prefix='sqlalchemy.',
-        poolclass=pool.NullPool,
-    )
+    connectable = current_app.extensions['migrate'].db.get_engine()
 
     with connectable.connect() as connection:
         context.configure(