lambdalisue /
django-permission
| Conditions | 15 |
| Total Lines | 64 |
| Lines | 64 |
| Ratio | 100 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like AuthorPermissionLogic.has_perm() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | # coding=utf-8 |
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| 69 | def has_perm(self, user_obj, perm, obj=None): |
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| 70 | """ |
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| 71 | Check if user have permission (of object) |
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| 72 | |||
| 73 | If the user_obj is not authenticated, it return ``False``. |
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| 74 | |||
| 75 | If no object is specified, it return ``True`` when the corresponding |
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| 76 | permission was specified to ``True`` (changed from v0.7.0). |
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| 77 | This behavior is based on the django system. |
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| 78 | https://code.djangoproject.com/wiki/RowLevelPermissions |
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| 79 | |||
| 80 | If an object is specified, it will return ``True`` if the user is |
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| 81 | specified in ``field_name`` of the object (e.g. ``obj.author``). |
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| 82 | So once user create an object and the object store who is the author in |
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| 83 | ``field_name`` attribute (default: ``author``), the author can change |
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| 84 | or delete the object (you can change this behavior to set |
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| 85 | ``any_permission``, ``change_permissino`` or ``delete_permission`` |
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| 86 | attributes of this instance). |
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| 87 | |||
| 88 | Parameters |
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| 89 | ---------- |
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| 90 | user_obj : django user model instance |
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| 91 | A django user model instance which be checked |
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| 92 | perm : string |
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| 93 | `app_label.codename` formatted permission string |
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| 94 | obj : None or django model instance |
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| 95 | None or django model instance for object permission |
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| 96 | |||
| 97 | Returns |
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| 98 | ------- |
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| 99 | boolean |
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| 100 | Whether the specified user have specified permission (of specified |
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| 101 | object). |
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| 102 | """ |
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| 103 | if not user_obj.is_authenticated(): |
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| 104 | return False |
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| 105 | # construct the permission full name |
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| 106 | change_permission = self.get_full_permission_string('change') |
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| 107 | delete_permission = self.get_full_permission_string('delete') |
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| 108 | # check if the user is authenticated |
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| 109 | if obj is None: |
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| 110 | # object permission without obj should return True |
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| 111 | # Ref: https://code.djangoproject.com/wiki/RowLevelPermissions |
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| 112 | if self.any_permission: |
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| 113 | return True |
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| 114 | if self.change_permission and perm == change_permission: |
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| 115 | return True |
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| 116 | if self.delete_permission and perm == delete_permission: |
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| 117 | return True |
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| 118 | return False |
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| 119 | elif user_obj.is_active: |
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| 120 | # get author instance |
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| 121 | author = field_lookup(obj, self.field_name) |
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| 122 | if author == user_obj: |
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| 123 | if self.any_permission: |
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| 124 | # have any kind of permissions to the obj |
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| 125 | return True |
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| 126 | if (self.change_permission and |
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| 127 | perm == change_permission): |
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| 128 | return True |
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| 129 | if (self.delete_permission and |
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| 130 | perm == delete_permission): |
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| 131 | return True |
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| 132 | return False |
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| 133 |
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