Module: Mongoid::Association::Referenced::HasOne::Buildable

Includes:
WithPolymorphicCriteria
Included in:
Mongoid::Association::Referenced::HasOne
Defined in:
lib/mongoid/association/referenced/has_one/buildable.rb

Overview

The Builder behavior for has_one associations.

Instance Method Summary collapse

Methods included from WithPolymorphicCriteria

#with_polymorphic_criterion

Instance Method Details

#build(base, object, _type = nil, selected_fields = nil) ⇒ Document

This method either takes an _id or an object and queries for the inverse side using the id or sets the object after clearing the associated object.

Parameters:

  • base (Object) —

    The base object.

  • object (Object) —

    The object to use to build the association.

  • type (String) —

    The type of the association.

  • selected_fields (nil) (defaults to: nil) —

    Must be nil.

Returns:



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# File 'lib/mongoid/association/referenced/has_one/buildable.rb', line 23

def build(base, object, _type = nil, selected_fields = nil)
  if query?(object)
    # Handle array of hashes from $lookup aggregation
    if object.is_a?(Array) && object.all? { |o| o.is_a?(Hash) }
      doc = object.first
      return doc ? Factory.execute_from_db(klass, doc, nil, selected_fields, execute_callbacks: false) : nil
    end

    execute_query(object, base) unless base.new_record?
  else
    clear_associated(object)
    object
  end
end