module LogicalModel::Associations::BelongsTo::ClassMethods
Public Instance Methods
belongs_to(key, options = {})
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@param key [String] association name @param options [Hash] @option options [String/Constant] class
# File lib/logical_model/associations/belongs_to.rb, line 13 def belongs_to(key, options = {}) attr_accessor "#{key}_id" attr_class = get_attr_class(key, options) @belongs_to_keys ||= {} @belongs_to_keys.merge!({key => attr_class}) define_method("#{key}=") do |param| if param.is_a?(Hash) param.stringify_keys! instance_variable_set("@#{key}_id", param['id']) if param['id'] instance = attr_class.new(param) elsif param.is_a?(attr_class) instance_variable_set("@#{key}_id", param.id) instance = param else # ... end instance_variable_set("@#{key}",instance) end define_method(key) do instance = eval("@#{key}") if instance.nil? instance = attr_class.find(eval("#{key}_id")) instance_variable_set("@#{key}",instance) end instance end # TODO define_method("#{key}_attribute="){|param| ... } define_method "new_#{key}" do |param| attr_class return unless attr_class temp_object = attr_class.new(param.merge({"#{self.json_root}_id" => self.id})) eval(key.to_s) << temp_object temp_object end end
belongs_to_keys()
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# File lib/logical_model/associations/belongs_to.rb, line 57 def belongs_to_keys # This hack was needed to consider the case where the belongs_to was set on a parent class, for example: # # class ContactAttribute < LogicalModel # ... # belongs_to :contact # end # # class Telephone < ContactAttribute # ... # end # # It returns the parent's class variable if present. result = nil if !@belongs_to_keys.nil? result = @belongs_to_keys elsif self.superclass.respond_to? :belongs_to_keys result = self.superclass.belongs_to_keys else result = nil end result end
Private Instance Methods
get_attr_class(key, options)
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# File lib/logical_model/associations/belongs_to.rb, line 83 def get_attr_class(key, options) if options[:class] attr_class = options[:class].is_a?(String) ? options[:class].constantize : options[:class] else attr_class = key.to_s.singularize.camelize.constantize end attr_class end