Class: Ohm::Validations::Presenter

Inherits:
Object
  • Object
show all
Defined in:
lib/ohm/validations.rb

Overview

Provides a simple implementation using the Presenter Pattern. When presenting errors, you have to properly catch all errors generated, or else you’ll get an UnhandledErrors exception.

Defined Under Namespace

Classes: UnhandledErrors

Instance Method Summary (collapse)

Constructor Details

- (Presenter) initialize(errors)

A new instance of Presenter 



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# File 'lib/ohm/validations.rb', line 71

def initialize(errors)
  @errors = errors
  @unhandled = errors.dup
  @output = []
end

Instance Method Details

- (Object) handle(error) (protected) 



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# File 'lib/ohm/validations.rb', line 95

def handle(error)
  if (errors = @errors.select {|e| error === e }).any?
    @unhandled -= errors
    yield(errors) if block_given?
  end
end

- (Object) ignore(error) 



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# File 'lib/ohm/validations.rb', line 83

def ignore(error)
  handle(error)
end

- (Object) on(error, message = (block_given? ? yield : raise(ArgumentError))) 



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# File 'lib/ohm/validations.rb', line 77

def on(error, message = (block_given? ? yield : raise(ArgumentError)))
  handle(error) do
    @output << message
  end
end

- (Object) present {|_self| ... }

Yields:

  • (_self)

Yield Parameters:

Raises:



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# File 'lib/ohm/validations.rb', line 87

def present
  yield(self)
  raise UnhandledErrors.new(@unhandled) unless @unhandled.empty?
  @output
end