Module: Mongoid::Association::Referenced::HasAndBelongsToMany::Buildable

Included in:
Mongoid::Association::Referenced::HasAndBelongsToMany
Defined in:
lib/mongoid/association/referenced/has_and_belongs_to_many/buildable.rb

Overview

The Builder behavior for has_and_belongs_to_many associations.

Instance Method Summary collapse

Instance Method Details

#build(_base, object, _type = nil, selected_fields = nil) ⇒ Array<Document>

This builder either takes a hash and queries for the object or an array of documents, where it will just return them.

Examples:

Build the documents.

relation.build(association, attrs)

Parameters:

  • base (Object) —

    The base object.

  • object (Object) —

    The object to use to build the association.

  • type (String) —

    Not used in this context.

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

    Must be nil.

Returns:



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# File 'lib/mongoid/association/referenced/has_and_belongs_to_many/buildable.rb', line 21

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) }
      return object.map do |attrs|
        Factory.execute_from_db(klass, attrs, nil, selected_fields, execute_callbacks: false)
      end
    end

    query_criteria(object)
  else
    object.try(:dup)
  end
end