ReadOnlyAdmin

readonlyadmin.py

## adopted from http://gremu.net/blog/2010/django-admin-read-only-permission/

class ReadOnlyAdmin(admin.ModelAdmin):
    """
    """

    def has_add_permission(self, request,obj=None):
        """

        Arguments:
        - `request`:
        - `obj`:
        """
        return self.__user_is_readonly(request)

    def has_delete_permission(self, request,obj=None):
        """

        Arguments:
        - `request`:
        - `obj`:
        """
        return self.__user_is_readonly(request)


    def get_actions(self, request):

        actions = super(ReadOnlyAdmin, self).get_actions(request)

        if self.__user_is_readonly(request):
            if 'delete_selected' in actions:
                del actions['delete_selected']

        return actions


    def change_view(self, request, object_id, extra_context=None):

        if self.__user_is_readonly(request):
            self.readonly_fields=self.user_readonly
            self.inlines = self.user_readonly_inlines

        try:
            return super(ReadOnlyAdmin, self).change_view(
                request, object_id, extra_context=extra_context)
        except PermissionDenied:
            pass
        if request.method == 'POST':
            raise PermissionDenied
        request.readonly = True
        return super(ReadOnlyAdmin, self).change_view(
            request, object_id, extra_context=extra_context)



    def __user_is_readonly(self, request):
        groups = [x.name for x in request.user.groups.all() ]

        return "readonly" in groups