start using alembic

manage.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python
+
+from woodwind import create_app
+from flask.ext.script import Manager
+from flask.ext.migrate import MigrateCommand
+
+app = create_app()
+manager = Manager(app)
+manager.add_command('db', MigrateCommand)
+
+if __name__ == '__main__':
+    manager.run()

migrations/README

@@ -0,0 +1 @@
+Generic single-database configuration.

migrations/alembic.ini

@@ -0,0 +1,45 @@
+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

migrations/env.py

@@ -0,0 +1,73 @@
+from __future__ import with_statement
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+from logging.config import fileConfig
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# 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'))
+target_metadata = current_app.extensions['migrate'].db.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(url=url)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    engine = engine_from_config(
+                config.get_section(config.config_ini_section),
+                prefix='sqlalchemy.',
+                poolclass=pool.NullPool)
+
+    connection = engine.connect()
+    context.configure(
+                connection=connection,
+                target_metadata=target_metadata
+                )
+
+    try:
+        with context.begin_transaction():
+            context.run_migrations()
+    finally:
+        connection.close()
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
+

migrations/script.py.mako

@@ -0,0 +1,22 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision}
+Create Date: ${create_date}
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

woodwind/extensions.py

@@ -1,18 +1,21 @@
 from flask.ext.login import LoginManager
 from flask.ext.micropub import MicropubClient
 from flask.ext.sqlalchemy import SQLAlchemy
-from flask_debugtoolbar import DebugToolbarExtension
+#from flask_debugtoolbar import DebugToolbarExtension
+from flask.ext.migrate import Migrate
 
 
 db = SQLAlchemy()
 micropub = MicropubClient(client_id='http://reader.kylewm.com')
 login_mgr = LoginManager()
 login_mgr.login_view = 'views.index'
-toolbar = DebugToolbarExtension()
+#toolbar = DebugToolbarExtension()
+migrate = Migrate()
 
 
 def init_app(app):
     db.init_app(app)
     micropub.init_app(app)
     login_mgr.init_app(app)
-    toolbar.init_app(app)
+    #toolbar.init_app(app)
+    migrate.init_app(app, db)

woodwind/tasks.py

@@ -10,6 +10,7 @@ import json
 import logging
 import mf2py
 import mf2util
+import os.path
 import re
 import requests
 import rq
@@ -19,8 +20,8 @@ import sys
 import time
 import urllib.parse
 
-config = FlaskConfig('/srv/www/kylewm.com/woodwind')
-config.from_pyfile('woodwind.cfg')
+config = FlaskConfig(os.path.dirname(os.path.realpath(__file__)))
+config.from_pyfile('../woodwind.cfg')
 
 # normal update interval for polling feeds
 UPDATE_INTERVAL = datetime.timedelta(hours=1)