Undefined method 'where'

Question

I have this:

def self.testing    
    nodo = Attribute.where(:product_attribute_type_id => 7, :value => 1)  
end

in a Product class method, then I load Attribute Class before a load Product class, then I call the testing method:

a = Product.testing

But I get this error:

undefined method `where' for ActiveRecord::AttributeMethods::Serialization::Attribute:Class

Pointing at testing method, I read some errors and question here, but I don't get error.

Can anyone help me, please?

Is `Attribute` a model ? It seems that `Attribute` is not a model class. — brcebn, Jun 20 '14 at 22:40
Yes, It's a class. Also I bold the text where I describe it. — José Castro, Jun 20 '14 at 22:46

score 1 · Accepted Answer · answered Jun 20 '14 at 22:36

1

What is Attribute supposed to be ? You just want to call where (or self.where), not Attribute.where.

Where did you see this method of definining scopes?

NOTE : Oh, I think I get it. You have a model named Attribute -- That won't fly by ActiveRecord. You could always use it by saying ::Attribute, but it's going to break at some point.

answered Jun 20 '14 at 22:36

Ven

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Attribute is another class, deriving from ActiveRecord::Base – José Castro Jun 20 '14 at 22:40
Is it one of your class ? You can't name of your models `Attribute`; I'm afraid – Ven Jun 20 '14 at 22:40
Ummm I trying the code out of a class method (out of Product class), and works fine – José Castro Jun 20 '14 at 22:42
because that class isn't inheriting `ActiveRecord::Base`, right ? :) – Ven Jun 20 '14 at 22:43
Product and Attribute inheriting from ActiveRecord::Base – José Castro Jun 20 '14 at 22:44
Yeah - Not what I'm saying. What I'm asking is - when you extract the code out of Product, you're not in ActiveRecord::Base anymore, right ? – Ven Jun 20 '14 at 22:45
Yeah, I'm out that, in a simple file that load the class Attribute and use the method – José Castro Jun 20 '14 at 22:48
Exactly What I'm saying. `Attribute` is reserved because when you're in the context of `ActiveRecord::Base`, you get all the constants AR has "imported", etc. Do you understand ? – Ven Jun 20 '14 at 22:51
Completely!! Thanks for your helping. – José Castro Jun 20 '14 at 22:54

Undefined method 'where'

1 Answers1