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README.rst

https://travis-ci.org/wichert/pyramid_sqlalchemy.svg?branch=master

pyramid_sqlalchemy provides some basic glue to facilitate using SQLAlchemy with Pyramid.

SQLAlchemy relies on global state for a few things:

  • A MetaData instance which tracks all known SQL tables.
  • A base class for all models using the ORM.
  • A session factory.

Every application using SQLAlchemy must provides its own instance of these. This makes it hard create add-on packages that also use SQLAlchemy, since they either need to have their own SQLAlchemy state, which makes it hard to integrate them into your application, or they need to jump through multiple complex hoops to allow them share state with your application.

pyramid_sqlalchemy helps by providing a canonical location for the global SQLAlchemy state. In addition it provides a convenient way to configure SQLAlchemy in a Pyramid application.

from pyramid.config import Configurator
from pyramid_sqlalchemy import BaseObject

class MyModel(BaseObject):
    __tablename__ = 'my_model'
    ...

def main():
    config = Configurator()
    # Configure SQLAlchemy using settings from the .ini file
    config.include('pyramid_sqlalchemy')
    ...
    return config.make_wsgi_app()