Class: Mongoid::Relations::Bindings::Referenced::ManyToMany

Inherits:
Mongoid::Relations::Binding show all
Defined in:
lib/mongoid/relations/bindings/referenced/many_to_many.rb

Overview

Binding class for all references_and_referenced_in_many relations.

Instance Attribute Summary

Attributes inherited from Mongoid::Relations::Binding

#base, #metadata, #target

Instance Method Summary collapse

Methods inherited from Mongoid::Relations::Binding

#binding, #initialize

Constructor Details

This class inherits a constructor from Mongoid::Relations::Binding

Instance Method Details

#bind_one(doc) ⇒ Object

Binds a single document with the inverse relation. Used specifically when appending to the proxy.

Examples:

Bind one document.

person.preferences.bind_one(preference)

Parameters:

  • doc (Document) —

    The single document to bind.

Since:

  • 2.0.0.rc.1



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# File 'lib/mongoid/relations/bindings/referenced/many_to_many.rb', line 19

def bind_one(doc)
  binding do
    inverse_keys = doc.you_must(metadata.inverse_foreign_key)
    if inverse_keys
      unless inverse_keys.include?(inverse_record_id(doc))
        inverse_keys.push(inverse_record_id(doc))
      end
      doc.reset_relation_criteria(metadata.inverse)
    end
    base.synced[metadata.foreign_key] = true
    doc.synced[metadata.inverse_foreign_key] = true
  end
end

#determine_inverse_metadata(doc) ⇒ Object 



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# File 'lib/mongoid/relations/bindings/referenced/many_to_many.rb', line 62

def determine_inverse_metadata(doc)
  doc.relations[base.class.name.demodulize.underscore.pluralize]
end

#inverse_record_id(doc) ⇒ Object

Find the inverse id referenced by inverse_keys



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# File 'lib/mongoid/relations/bindings/referenced/many_to_many.rb', line 53

def inverse_record_id(doc)
  inverse_metadata = determine_inverse_metadata(doc)
  if inverse_metadata
    base.__send__(inverse_metadata.primary_key)
  else
    base._id
  end
end

#unbind_one(doc) ⇒ Object

Unbind a single document.

Examples:

Unbind the document.

person.preferences.unbind_one(document)

Since:

  • 2.0.0.rc.1



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# File 'lib/mongoid/relations/bindings/referenced/many_to_many.rb', line 39

def unbind_one(doc)
  binding do
    base.send(metadata.foreign_key).delete_one(record_id(doc))
    inverse_keys = doc.you_must(metadata.inverse_foreign_key)
    if inverse_keys
      inverse_keys.delete_one(inverse_record_id(doc))
      doc.reset_relation_criteria(metadata.inverse)
    end
    base.synced[metadata.foreign_key] = true
    doc.synced[metadata.inverse_foreign_key] = true
  end
end