method

build

v5.2.3 - Show latest stable - 0 notes - Class: CallTemplate

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build(filter, callback) public

Filters support:

Symbols:: A method to call.
Procs::   A proc to call with the object.
Objects:: An object with a <tt>before_foo</tt> method on it to call.

All of these objects are converted into a CallTemplate and handled the same after this point.

Show source

# File activesupport/lib/active_support/callbacks.rb, line 447
        def self.build(filter, callback)
          case filter
          when Symbol
            new(nil, filter, [], nil)
          when Conditionals::Value
            new(filter, :call, [:target, :value], nil)
          when ::Proc
            if filter.arity > 1
              new(nil, :instance_exec, [:target, :block], filter)
            elsif filter.arity > 0
              new(nil, :instance_exec, [:target], filter)
            else
              new(nil, :instance_exec, [], filter)
            end
          else
            method_to_call = callback.current_scopes.join("_")

            new(filter, method_to_call, [:target], nil)
          end
        end

build

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