Module: Xeroizer::Record::RecordAssociationHelper::ClassMethods

Defined in:
lib/xeroizer/record/record_association_helper.rb

Instance Method Summary collapse

Instance Method Details

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



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# File 'lib/xeroizer/record/record_association_helper.rb', line 11

def belongs_to(field_name, options = {})
  internal_field_name = options[:internal_name] || field_name
  internal_singular_field_name = internal_field_name.to_s.singularize
  
  define_association_attribute(field_name, internal_singular_field_name, :belongs_to, options)

  # Create a #build_record_name method to build the record.
  define_method "build_#{internal_singular_field_name}" do | *args |
    attributes = args.size == 1 ? args.first : {}
  
    # The name of the record model.
    model_name = options[:model_name] ? options[:model_name].to_sym : field_name.to_s.singularize.camelize.to_sym
  
    # The record's parent instance for this current application.
    model_parent = new_model_class(model_name)
  
    # Create a new record, binding it to it's parent instance.
    record = Xeroizer::Record.const_get(model_name).build(attributes, model_parent)
    self.attributes[field_name] = record
  end
end

#define_association_attribute(field_name, internal_field_name, association_type, options) ⇒ Object 



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# File 'lib/xeroizer/record/record_association_helper.rb', line 82

def define_association_attribute(field_name, internal_field_name, association_type, options)
  define_simple_attribute(field_name, association_type, options.merge!(:skip_writer => true), ((association_type == :has_many) ? [] : nil))
  
  internal_field_name = options[:internal_name] || field_name
  internal_singular_field_name = internal_field_name.to_s.singularize
  model_name = options[:model_name] ? options[:model_name].to_sym : field_name.to_s.singularize.camelize.to_sym
    
  define_method "#{internal_field_name}=".to_sym do | value | 
    record_class = Xeroizer::Record.const_get(model_name)
    case value
      when Hash 
        self.attributes[field_name] = ((association_type == :has_many) ? [] : nil)
        case association_type
          when :has_many  
            self.attributes[field_name] = []
            self.send("add_#{internal_singular_field_name}".to_sym, value)
            
          when :belongs_to  
            self.attributes[field_name] = Xeroizer::Record.const_get(model_name).build(value, new_model_class(model_name))
            
        end
        
      when Array
        self.attributes[field_name] = ((association_type == :has_many) ? [] : nil)
        value.each do | single_value |
          case single_value
            when Hash         then send("add_#{internal_singular_field_name}".to_sym, single_value)
            when record_class then self.attributes[field_name] << single_value
            else                   raise AssociationTypeMismatch.new(record_class, single_value.class)
          end
        end
        
      when record_class
        self.attributes[field_name] = ((association_type == :has_many) ? [value] : value)
        
      when NilClass
        self.attributes[field_name] = []
        
      else
        raise AssociationTypeMismatch.new(record_class, value.class)
    end
  end
  
  # Override reader for this association if this association belongs
  # to a summary-typed record. This will automatically attempt to download
  # the complete version of the record before accessing the association.
  if list_contains_summary_only?
    define_method internal_field_name do
      download_complete_record! unless new_record? || options[:list_complete] || complete_record_downloaded?
      self.attributes[field_name] || ((association_type == :has_many) ? [] : nil)
    end
  end
end

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



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# File 'lib/xeroizer/record/record_association_helper.rb', line 33

def has_many(field_name, options = {})
  internal_field_name = options[:internal_name] || field_name
  internal_singular_field_name = internal_field_name.to_s.singularize

  define_association_attribute(field_name, internal_field_name, :has_many, options)
          
  # Create an #add_record_name method to build the record and add to the attributes.
  define_method "add_#{internal_singular_field_name}" do | *args |
    # The name of the record model.
    model_name = options[:model_name] ? options[:model_name].to_sym : field_name.to_s.singularize.camelize.to_sym

    # The record's parent instance for this current application.
    model_parent = new_model_class(model_name)
  
    # The class of this record.
    record_class = Xeroizer::Record.const_get(model_name)

    # Parse the *args variable so that we can use this method like:
    #   add_record({fields}, {fields}, ...)
    #   add_record(record_one, record_two, ...)
    #   add_record([{fields}, {fields}], ...)
    #   add_record(key => val, key2 => val)
    records = []
    if args.size == 1 && args.first.is_a?(Array)
      records = args.first
    elsif args.size > 0 
      records = args
    else
      raise StandardError.new("Invalid arguments for #{self.class.name}#add_#{internal_singular_field_name}(#{args.inspect}).")
    end
  
    # Ensure that complete record is downloaded before adding new records
    self.send(field_name)
    
    # Add each record.
    last_record = nil
    records.each do | record |
      record = record_class.build(record, model_parent) if record.is_a?(Hash)
      raise StandardError.new("Record #{record.class.name} is not a #{record_class.name}.") unless record.is_a?(record_class)
      self.attributes[field_name] ||= []
      self.attributes[field_name] << record
      last_record = record
    end
    
    last_record # last record
  end
  
end