Class: Mongoid::Relations::Eager::BelongsTo

Inherits:
Base
  • Object
show all
Defined in:
lib/mongoid/relations/eager/belongs_to.rb

Instance Method Summary collapse

Methods inherited from Base

#each_loaded_document, #grouped_docs, #initialize, #keys_from_docs, #run, #set_on_parent, #shift_metadata

Constructor Details

This class inherits a constructor from Mongoid::Relations::Eager::Base

Instance Method Details

#group_by_key ⇒ Object 



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# File 'lib/mongoid/relations/eager/belongs_to.rb', line 21

def group_by_key
  @metadata.foreign_key
end

#key ⇒ Object 



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# File 'lib/mongoid/relations/eager/belongs_to.rb', line 25

def key
  @metadata.primary_key
end

#preload ⇒ Object

Raises:



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# File 'lib/mongoid/relations/eager/belongs_to.rb', line 8

def preload
  raise Errors::EagerLoad.new(@metadata.name) if @metadata.polymorphic?

  @docs.each do |d|
    set_relation(d, nil)
  end

  each_loaded_document do |doc|
    id = doc.send(key)
    set_on_parent(id, doc)
  end
end