NameError: undefined method 'options' for class

Question

When I create instance of class, Error is raised NameError: undefined method 'options' for class 'Product'.

DB: MongoDB 3.6

Class Product
     include Mongoid::Document
     include Mongoid::Timestamps
     include Mongoid::Attributes::Dynamic

     field :options, type: Hash, default: {}
end

gem: mongoid (6.1.1)

NOTE: It works well when I change field name to option or anything else, only options Fails. TIA

`options` is also the name of the 2nd parameter variable in the definition of the `fields()` method. `:type` and `:default` are gathered into a Hash which is assigned to the `options` parameter variable. However, there's nothing in the ruby language that prevents you from passing the name of the 2nd parameter variable as an arg to the 1st parameter variable. — 7stud, Jan 25 '18 at 15:29
*When I create instance of class, Error is raised*--Are you sure that's all you did? — 7stud, Jan 25 '18 at 15:51

score 2 · Answer 1 · edited Jun 20 '20 at 09:12

Taken from here:

Reserved names

If you define a field on your document that conflicts with a reserved method name in Mongoid, the configuration will raise an error. For a list of these you may look at Mongoid.destructive_fields.

Some code from mongoid:

# File 'lib/mongoid/config.rb', line 69

def destructive_fields
  Composable.prohibited_methods
end


# File 'lib/mongoid/composable.rb', line 98

def prohibited_methods
  @prohibited_methods ||= MODULES.flat_map do |mod|
    mod.instance_methods.map(&:to_sym)
  end
end

MODULES constant contains Fields module at least which defines options method. Maybe it's the reason.

NameError: undefined method 'options' for class

1 Answers1