Exception: Mongoid::Errors::UnregisteredClass

Inherits:
MongoidError
  • Object
show all
Defined in:
lib/mongoid/errors/unregistered_class.rb

Overview

Raised when Mongoid tries to query the identifier to use for a given class in a polymorphic association, but the class has not previously been registered by resolver that was used for the query.

Here’s an exammple:

class Department
  include Mongoid::Document
  has_many :managers, as: :unit
end

class Manager
  include Mongoid::Document
  belongs_to :unit, polymorphic: :org
end

The Manager class is configured to use a custom resolver named ‘:org` when resolving the polymorphic `unit` association. However, the `Department` class is not registered with that resolver. When the program tries to associate a manager record with a department, it will not be able to find the required key in the `:org` resolver, and will fail with this exception.

The solution is to make sure the ‘Department` class is properly registered with the `:org` resolver:

class Department
  include Mongoid::Document
  identify_as resolver: :org
  has_many :managers, as: :unit
end

Constant Summary

Constants inherited from MongoidError

MongoidError::BASE_KEY

Instance Attribute Summary

Attributes inherited from MongoidError

#problem, #resolution, #summary

Instance Method Summary collapse

Methods inherited from MongoidError

#compose_message

Constructor Details

#initialize(klass, resolver) ⇒ UnregisteredClass

Returns a new instance of UnregisteredClass.



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# File 'lib/mongoid/errors/unregistered_class.rb', line 36

def initialize(klass, resolver)
  super(
    compose_message(
      'unregistered_class',
      klass: klass,
      resolver: resolver.inspect
    )
  )
end