Class: Reform::Form::ActiveModel::ModelValidations::Mapping

Inherits:
Object
  • Object
show all
Defined in:
lib/reform/form/active_model/model_validations.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Mapping

Returns a new instance of Mapping.



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# File 'lib/reform/form/active_model/model_validations.rb', line 73

def initialize
  @forward_map = {}
  @inverse_map = {}
end

Class Method Details

.from_representable_attrs(attrs) ⇒ Object 



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# File 'lib/reform/form/active_model/model_validations.rb', line 63

def self.from_representable_attrs(attrs)
  new.tap do |mapping|
    attrs.each do |dfn|
      from = dfn[:name].to_sym
      to = [dfn[:on], (dfn[:private_name] || dfn[:name])].compact.map(&:to_sym)
      mapping.add(from, to)
    end
  end
end

Instance Method Details

#add(from, to) ⇒ Object

from is a symbol attribute to is an 1 or 2 element array, depending on whether the attribute is ‘namespaced’, as it is with composite forms. eg, add(:phone_number, [:person, :phone])



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# File 'lib/reform/form/active_model/model_validations.rb', line 81

def add(from, to)
  raise 'Mapping is not one-to-one' if @forward_map.has_key?(from) || @inverse_map.has_key?(to)
  @forward_map[from] = to
  @inverse_map[to] = from
end

#forward(attr) ⇒ Object 



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# File 'lib/reform/form/active_model/model_validations.rb', line 91

def forward(attr)
  @forward_map[attr]
end

#forward_image(attrs) ⇒ Object 



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# File 'lib/reform/form/active_model/model_validations.rb', line 87

def forward_image(attrs)
  @forward_map.values_at(*attrs).compact
end

#inverse(attr) ⇒ Object 



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# File 'lib/reform/form/active_model/model_validations.rb', line 99

def inverse(attr)
  @inverse_map[attr]
end

#inverse_image(attrs) ⇒ Object 



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# File 'lib/reform/form/active_model/model_validations.rb', line 95

def inverse_image(attrs)
  @inverse_map.values_at(*attrs).compact
end