Module: Loco::Associatable::ClassMethods

Defined in:
lib/motion-loco/associatable.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(model, options = {}) ⇒ Object 



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# File 'lib/motion-loco/associatable.rb', line 21

def belongs_to(model, options={})
  attr_accessor model
  attr_accessor "#{model}_id"
  
  define_method "#{model}" do |&block|
    belongs_to_class = options[:class_name] ? options[:class_name].to_s.classify.constantize : model.to_s.classify.constantize
    record = instance_variable_get("@#{model}")
    if record
      block.call(record) if block.is_a? Proc
      record
    else
      belongs_to_id = self.send("#{model}_id")
      if belongs_to_id
        belongs_to_class.find(belongs_to_id) do |record|
          instance_variable_set("@#{model}", record)
          block.call(record) if block.is_a? Proc
        end
      else
        block.call(record) if block.is_a? Proc
        record
      end
    end
  end
  
  define_method "#{model}=" do |record|
    belongs_to_class = options[:class_name] ? options[:class_name].to_s.classify.constantize : model.to_s.classify.constantize
    raise TypeError, "Expecting a #{belongs_to_class} as defined by #belongs_to :#{model}" unless record.is_a? belongs_to_class
    instance_variable_set("@#{model}", record)
    self.send("#{model}_id=", (record.nil? ? nil : record.id))
    record
  end
  
  alias_method model.to_s.camelize(:lower), model
  alias_method "#{model.to_s.camelize(:lower)}=", "#{model}="
  
  relationships = get_class_relationships
  relationships << { belongs_to: model, class_name: options[:class_name] }
end

#has_many(model, options = {}) ⇒ Object 



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# File 'lib/motion-loco/associatable.rb', line 60

def has_many(model, options={})
  attr_accessor model
  attr_accessor "#{model.to_s.singularize}_ids"
  
  define_method "#{model}" do |&block|
    has_many_class = options[:class_name] ? options[:class_name].to_s.classify.constantize : model.to_s.singularize.classify.constantize
    record_array = instance_variable_get("@#{model}")
    if record_array.is_loaded
      block.call(record_array) if block.is_a? Proc
      record_array
    else
      has_many_ids = instance_variable_get("@#{model.to_s.singularize}_ids")
      if has_many_ids
        array = has_many_class.find(has_many_ids) do |records|
          record_array.load(records)
          instance_variable_set("@#{model}", record_array)
          block.call(record_array) if block.is_a? Proc
        end
        record_array.load(array)
      else
        query = {}
        foreign_key = options[:foreign_key] ? options[:foreign_key] : "#{self.class.to_s.underscore.singularize}_id"
        query[foreign_key] = self.id
        array = has_many_class.find(query) do |records|
          record_array.load(records)
          instance_variable_set("@#{model}", record_array)
          block.call(record_array) if block.is_a? Proc
        end
        record_array.load(array)
      end
      instance_variable_set("@#{model}", record_array)
      record_array
    end
  end
  
  define_method "#{model}=" do |records|
    has_many_class = options[:class_name] ? options[:class_name].to_s.classify.constantize : model.to_s.singularize.classify.constantize
    if (records.is_a?(RecordArray) || records.is_a?(Array)) && (records.length == 0 || (records.length > 0 && records.first.class == has_many_class))
      unless records.is_a?(RecordArray)
        record_array = RecordArray.new(item_class: has_many_class, belongs_to: self)
        record_array.addObjectsFromArray(records)
        records = record_array
      end
    else
      raise TypeError, "Expecting a Loco::RecordArray of #{has_many_class} objects as defined by #has_many :#{model}"
    end
    
    instance_variable_set("@#{model}", records)
    instance_variable_set("@#{model.to_s.singularize}_ids", records.map(&:id))
    records
  end
  
  alias_method model.to_s.camelize(:lower), model
  alias_method "#{model.to_s.camelize(:lower)}=", "#{model}="
  
  relationships = get_class_relationships
  relationships << { has_many: model, class_name: options[:class_name] }
end