Class: Riot::DataMapper::HasAssociation

Inherits:
AssertionMacro
  • Object
show all
Defined in:
lib/riot-datamapper/has_association.rb

Constant Summary collapse

MAPPINGS = 
{
  :has_n      => 'OneToMany',
  :has_1      => 'OneToOne',
  :belongs_to => 'ManyToOne',
}

Instance Method Summary collapse

Instance Method Details

#evaluate(model, type, assoc, options = {}) ⇒ Object 



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# File 'lib/riot-datamapper/has_association.rb', line 12

def evaluate(model, type, assoc, options = {})
  relationship = model.relationships[assoc]
  fail_msg     = "expected #{model} to have an association with :#{assoc}"
  pass_msg     = "#{model} has an association with :#{assoc}"
  type_msg     = " of type '#{type}'"
  options_msg  = " with options #{options.inspect}"

  return fail(fail_msg) if relationship.nil?

  if options[:through]
    through_type = 'ManyToMany'
    if relationship.through.name == options[:through]
      pass_msg << options_msg
    else
      return fail(fail_msg + options_msg)
    end
  end

  if options[:required]
    if relationship.instance_variable_get("@required") == options[:required]
      pass_msg << options_msg unless options[:through]
    else
      return fail(fail_msg + options_msg)
    end
  end

  if relationship.class.to_s.include?(through_type || MAPPINGS[type])
    pass_msg << type_msg
  else
    return fail(fail_msg + type_msg)
  end

  pass(pass_msg)
end