Module: ContentfulModel::Associations::BelongsToMany::ClassMethods

Defined in:
lib/contentful_model/associations/belongs_to_many.rb

Overview

Class method

Instance Method Summary collapse

Instance Method Details

#belongs_to_many(association_names, opts = {}) ⇒ Object

Parameters:

  • association_names (Symbol) —

    plural name of the class we need to search through, to find this class

  • opts (true, Hash) (defaults to: {}) —

    options



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# File 'lib/contentful_model/associations/belongs_to_many.rb', line 25

def belongs_to_many(association_names, opts = {})
  default_options = {
    class_name: association_names.to_s.singularize.classify,
    page_size: 100
  }
  options = default_options.merge(opts)

  # Set up the association name for the instance which loaded this object
  # This is useful in situations where, primarily, it's a 1:* relationship (i.e. belongs_to)
  # even though this isn't actually supported by Contentful
  #
  # f = Foo.first
  # b = f.bars.first
  # b.foo #would return the instance of Foo which loaded it

  define_method association_names.to_s.singularize do
    instance_variable_get(:"@#{association_names.to_s.singularize}")
  end

  define_method "#{association_names.to_s.singularize}=" do |parent|
    instance_variable_set(:"@#{association_names.to_s.singularize}", parent)
    instance_variable_set(:@loaded_with_parent, true)
    self
  end

  define_method :loaded_with_parent? do
    instance_variable_get(:@loaded_with_parent) ? true : false
  end

  define_method association_names do
    parents = instance_variable_get(:"@#{association_names}")
    if parents.nil?
      parents = []
      options[:class_name].constantize.send(:each_entry, options[:page_size], 'sys.updatedAt', links_to_entry: id) do |parent|
        parents << parent
      end

      instance_variable_set(:"@#{association_names}", parents)
    end
    parents
  end
end