module ExposeDB::Relations
Public Instance Methods
belongs_to(name, options = {})
click to toggle source
# File lib/expose_db/model/relations.rb, line 3 def belongs_to(name, options = {}) if options.key?(:class_name) class_name = options.fetch(:class_name).to_s else class_name = name.to_s.titleize end foreign_key = (options[:foreign_key] || "#{name.to_s.underscore}_id").to_sym define_method(name) do found = instance_variable_get(:"@#{name}") return found if found if id = send(foreign_key) found = self.class.resolve_relation_class(class_name).find(id) instance_variable_set(:"@#{name}", found) end found end end
constantize_class_from_name(camel_cased_word)
click to toggle source
Selected from ActiveSupport
# File lib/expose_db/model/relations.rb, line 59 def constantize_class_from_name(camel_cased_word) names = camel_cased_word.split('::') names.shift if names.empty? || names.first.empty? constant = Object names.each do |name| constant = constant.const_defined?(name) ? constant.const_get(name) : constant.const_missing(name) end constant end
has_many(plural_name, options = {})
click to toggle source
# File lib/expose_db/model/relations.rb, line 25 def has_many(plural_name, options = {}) singular_name = plural_name.to_s.sub(/s\Z/, '') if options.key?(:class_name) class_name = options.fetch(:class_name).to_s else class_name = singular_name.titleize end primary_key = (options[:primary_key] || :id).to_sym foreign_key = (options[:foreign_key] || "#{singular_name.underscore}_id").to_sym define_method(plural_name) do found = instance_variable_get(:"@#{plural_name}") return found if found relation_class = self.class.resolve_relation_class(class_name) found = relation_class.filter("#{foreign_key} = ?", send(primary_key)) instance_variable_set(:"@#{plural_name}", found) found end end
resolve_relation_class(class_name)
click to toggle source
# File lib/expose_db/model/relations.rb, line 50 def resolve_relation_class(class_name) resolved_relation_classes[class_name] ||= constantize_class_from_name(class_name) end
resolved_relation_classes()
click to toggle source
# File lib/expose_db/model/relations.rb, line 54 def resolved_relation_classes @resolved_relation_classes ||= {} end