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# coding=utf-8 |
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""" |
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Permission logic utilities |
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""" |
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from __future__ import unicode_literals |
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from permission.logics import PermissionLogic |
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def add_permission_logic(model, permission_logic): |
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""" |
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Add permission logic to the model |
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Parameters |
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---------- |
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model : django model class |
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A django model class which will be treated by the specified permission |
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logic |
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permission_logic : permission logic instance |
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A permission logic instance which will be used to determine permission |
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of the model |
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Examples |
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-------- |
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>>> from django.db import models |
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>>> from permission.logics import PermissionLogic |
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>>> class Mock(models.Model): |
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... name = models.CharField('name', max_length=120) |
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>>> add_permission_logic(Mock, PermissionLogic()) |
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""" |
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if not isinstance(permission_logic, PermissionLogic): |
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raise AttributeError( |
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'`permission_logic` must be an instance of PermissionLogic') |
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if not hasattr(model, '_permission_logics'): |
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model._permission_logics = set() |
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if not hasattr(model, '_permission_handler'): |
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from permission.utils.handlers import registry |
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# register default permission handler |
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registry.register(model, handler=None) |
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model._permission_logics.add(permission_logic) |
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# store target model to the permission_logic instance |
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permission_logic.model = model |
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def remove_permission_logic(model, permission_logic, fail_silently=True): |
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""" |
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Remove permission logic to the model |
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Parameters |
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---------- |
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model : django model class |
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A django model class which will be treated by the specified permission |
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logic |
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permission_logic : permission logic class or instance |
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A permission logic class or instance which will be used to determine |
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permission of the model |
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fail_silently : boolean |
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If `True` then do not raise KeyError even the specified permission logic |
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have not registered. |
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Examples |
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-------- |
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>>> from django.db import models |
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>>> from permission.logics import PermissionLogic |
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>>> class Mock(models.Model): |
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... name = models.CharField('name', max_length=120) |
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>>> logic = PermissionLogic() |
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>>> add_permission_logic(Mock, logic) |
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>>> remove_permission_logic(Mock, logic) |
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""" |
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if not hasattr(model, '_permission_logics'): |
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model._permission_logics = set() |
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if not isinstance(permission_logic, PermissionLogic): |
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# remove all permission logic of related |
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remove_set = set() |
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for _permission_logic in model._permission_logics: |
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if _permission_logic.__class__ == permission_logic: |
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remove_set.add(_permission_logic) |
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# difference |
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model._permission_logics = model._permission_logics.difference(remove_set) |
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else: |
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if fail_silently and permission_logic not in model._permission_logics: |
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pass |
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else: |
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model._permission_logics.remove(permission_logic) |
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lambdalisue /
django-permission
