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An extensible library for managing object-level permissions with support for SQLAlchemy, Peewee, Pony, and Django.

Project description

Latest version Travis CI

guardrail is a Python library for managing object-level permissions that’s designed to integrate with arbitrary databases and web frameworks. guardrail is inspired by django-guardian and currently supports the SQLAlchemy, Peewee, Pony, and Django ORMs.

guardrail is easy to integrate with any Python web framework. Documentation and usage examples coming soon.

Install

pip install guardrail

guardrail supports Python >= 2.7 or >= 3.3 and pypy.

Examples

Define your models as usual, using the registry.agent and registry.target decorators to set up permissions relationships:

import peewee as pw

from guardrail.core import registry
from guardrail.ext.peewee import PeeweePermissionSchemaFactory

database = pw.SqliteDatabase(':memory:')
class Base(pw.Model):
    class Meta:
        database = database

@registry.agent
class User(Base):
    name = pw.CharField()

@registry.target
class Post(Base):
    name = pw.CharField()

@registry.target
class Comment(Base):
    name = pw.CharField()

factory = PeeweePermissionSchemaFactory((Base, ))
registry.make_schemas(factory)

database.connect()
database.create_tables([User, Post, Comment], safe=True)
database.create_tables(registry.permissions, safe=True)

Then use the permission manager to perform CRUD operations on permissions between any agent and target models:

from guardrail.ext.peewee import PeeweePermissionManager

manager = PeeweePermissionManager()

user = User.create(name='fred')
post = Post.create(name='news of the world')
comment = Comment.create(name='dragon attack')

manager.add_permission(user, post, 'edit')
manager.add_permission(user, comment, 'delete')

manager.has_permission(user, post, 'edit')          # True

manager.remove_permission(user, comment, 'delete')

manager.has_permission(user, comment, 'delete')     # False

License

MIT licensed. See the LICENSE file for details.

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