Module: NPR::Concern::Relation::ClassMethods

Defined in:
lib/npr/concern/relation.rb

Overview

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#_has_many_relations ⇒ Object 



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# File 'lib/npr/concern/relation.rb', line 53

def _has_many_relations
  @_has_many_relations ||= []
end

#_has_one_relations ⇒ Object 



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# File 'lib/npr/concern/relation.rb', line 57

def _has_one_relations
  @_has_one_relations ||= []
end

Instance Method Details

#has_many(name, options) ⇒ Object

Define a relationship Similar to ActiveRecord’s has_many

Arguments:

  • name (String) - the name of the relation

  • options (Hash)

    * class_name (Class) - the class for the related objects
* key (String) - the JSON key that holds this relation

Example:

has_many "links", key: "link", class_name: NPR::Entity::Link



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# File 'lib/npr/concern/relation.rb', line 29

def has_many(name, options)
  relation = build_relation(name, options)

  # Define getter and setter for this attribute
  # Forces the relation into an empty array when
  # it's first accessed.
  attr_writer name
  define_method name do
    instance_variable_get("@#{name}") || instance_variable_set("@#{name}", [])
  end

  _has_many_relations.push relation
end

#has_one(name, options) ⇒ Object 



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# File 'lib/npr/concern/relation.rb', line 45

def has_one(name, options)
  relation = build_relation(name, options)
  attr_accessor name
  _has_one_relations.push relation
end