Module: ActiveRecord::VirtualAttributes::VirtualDelegates::ClassMethods
- Defined in:
- lib/active_record/virtual_attributes/virtual_delegates.rb
Instance Method Summary collapse
-
#virtual_delegate(*methods) ⇒ Object
Definition.
Instance Method Details
#virtual_delegate(*methods) ⇒ Object
Definition
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# File 'lib/active_record/virtual_attributes/virtual_delegates.rb', line 22 def virtual_delegate(*methods) = methods. unless (to = [:to]) raise ArgumentError, 'Delegation needs an association. Supply an options hash with a :to key as the last argument (e.g. delegate :hello, to: :greeter).' end to = to.to_s if to.include?(".") && methods.size > 1 raise ArgumentError, 'Delegation only supports specifying a method name when defining a single virtual method' end if to.count(".") > 1 raise ArgumentError, 'Delegation needs a single association. Supply an option hash with a :to key with only 1 period (e.g. delegate :hello, to: "greeter.greeting")' end allow_nil = [:allow_nil] default = [:default] # put method entry per method name. # This better supports reloading of the class and changing the definitions methods.each do |method| method_prefix = virtual_delegate_name_prefix([:prefix], to) method_name = "#{method_prefix}#{method}" if to.include?(".") # to => "target.method" to, method = to.split(".").map(&:to_sym) [:to] = to end define_delegate(method_name, method, :to => to, :allow_nil => allow_nil, :default => default) self.virtual_delegates_to_define = virtual_delegates_to_define.merge(method_name => [method, ]) end end |