method

run_callbacks

v6.1.3.1 - Show latest stable - 0 notes - Class: ActiveSupport::Callbacks

run_callbacks(kind) public

Runs the callbacks for the given event.

Calls the before and around callbacks in the order they were set, yields the block (if given one), and then runs the after callbacks in reverse order.

If the callback chain was halted, returns false. Otherwise returns the result of the block, nil if no callbacks have been set, or true if callbacks have been set but no block is given.

run_callbacks :save do
  save
end

Show source

# File activesupport/lib/active_support/callbacks.rb, line 94
    def run_callbacks(kind)
      callbacks = __callbacks[kind.to_sym]

      if callbacks.empty?
        yield if block_given?
      else
        env = Filters::Environment.new(self, false, nil)
        next_sequence = callbacks.compile

        # Common case: no 'around' callbacks defined
        if next_sequence.final?
          next_sequence.invoke_before(env)
          env.value = !env.halted && (!block_given? || yield)
          next_sequence.invoke_after(env)
          env.value
        else
          invoke_sequence = Proc.new do
            skipped = nil

            while true
              current = next_sequence
              current.invoke_before(env)
              if current.final?
                env.value = !env.halted && (!block_given? || yield)
              elsif current.skip?(env)
                (skipped ||= []) << current
                next_sequence = next_sequence.nested
                next
              else
                next_sequence = next_sequence.nested
                begin
                  target, block, method, *arguments = current.expand_call_template(env, invoke_sequence)
                  target.send(method, *arguments, &block)
                ensure
                  next_sequence = current
                end
              end
              current.invoke_after(env)
              skipped.pop.invoke_after(env) while skipped&.first
              break env.value
            end
          end

          invoke_sequence.call
        end
      end
    end

run_callbacks

Related methods