models.py 文件源码

def delete(self, *args, **kwargs):
        '''
        Reset all cached infos
        '''
        super(ExerciseImage, self).delete(*args, **kwargs)

        for language in Language.objects.all():
            delete_template_fragment_cache('muscle-overview', language.id)
            delete_template_fragment_cache('exercise-overview', language.id)
            delete_template_fragment_cache('exercise-overview-mobile', language.id)
            delete_template_fragment_cache('equipment-overview', language.id)

        # Make sure there is always a main image
        if not ExerciseImage.objects.accepted() \
                .filter(exercise=self.exercise, is_main=True).count() \
           and ExerciseImage.objects.accepted() \
                .filter(exercise=self.exercise) \
                .filter(is_main=False) \
                .count():

                image = ExerciseImage.objects.accepted() \
                    .filter(exercise=self.exercise, is_main=False)[0]
                image.is_main = True
                image.save()