maximum recursion depth exceeded getter Django

Question

I have some class with custom getter for specific attr:

class Item(a, b, c, d, models.Model):
     title = Field()
     description = Field()
     a = Field()
     _custom_getter = ['title','description']

     def __getattribute__(self, name):
         if name in self.custom_getter:
             return 'xxx'
         else:
             return super(Item, self).__getattribute__(name)

this code raise RunetimeError: maximum recursion depth exceeded while calling a Python object but when i use this piece of code:

class Item(a, b, c, d, models.Model):
    title = Field()
    description = Field()
    a = Field()

    def __getattribute__(self, name):
        custom_getter = ['title','description']
        if name in custom_getter:
            return 'xxx'
        else:
            return super(Item, self).__getattribute__(name)

all works like I want. Wher is my mistake in first piece of code ?

score 3 · Answer 1 · edited May 23 '17 at 12:16

3

Because __getattribute__ gets called when you do self.custom_getter. You can use self.__dict__ for this. Read more How is the __getattribute__ method used?

class Item(a, b, c, d, models.Model):
     title = Field()
     description = Field()
     a = Field()
     custom_getter = ['title','description']

     def __getattribute__(self, name):
         if name in self.__dict__['custom_getter']:
             return 'xxx'
         else:
             return super(Item, self).__getattribute__(name)

edited May 23 '17 at 12:16

Community

1
1

answered Oct 12 '16 at 07:50

Sardorbek Imomaliev

14,861
2
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63

I use `object.__getattribute__(self, '_custom_getter')` instead `self.__dict__['_custom_getter']` because it generate same error, but thanks for article, I found solution ther. – gargi258 Oct 12 '16 at 08:16

maximum recursion depth exceeded getter Django

1 Answers1