Module: CatForms::Form::ClassMethods

Defined in:
lib/cat_forms.rb

Instance Method Summary collapse

Instance Method Details

#attribute(name, type, opts = {}) ⇒ Object

Overrides how Virtus handles attributes of the wrong type. Ideally virtus would coerce everything to the right type, use the default, or return nil. There’s a related discussion here: github.com/solnic/virtus/issues/99



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# File 'lib/cat_forms.rb', line 43

def attribute(name, type, opts = {})
  super(name, type, opts)
  define_method(name) do
    data = super()
    default_value = -> { opts[:default].respond_to?(:call) ? opts[:default].call : opts[:default] }

    # If they want a BigDecimal or Int, but data is a string, strip
    # the stuff of bad data and try to convert manually.
    if type == BigDecimal or type == Integer
      if data.class == String
        data.gsub!(/[^\d\.]/, '')
        if data.present?
          if type == BigDecimal
            data = BigDecimal.new(data)
          else
            data = Integer(data)
          end
        end
      end
    end

    #if type.class != Array and !data.is_a?(type) and !data.nil? and (type != CatForms::Boolean and !data.is_a?(Boolean))
      #puts "cat forms expected a #{type} for #{ name }, received #{ data.inspect }"
      #puts caller
    #end

    if type == CatForms::Boolean and (data == true or data == false)
      return data
    end

    if type.class == Array
      # Not validating more right now.
      return data
    end

    if data.is_a?(type)
      # Override for default string
      if type == String and opts.has_key?(:default) and data == ""
        return default_value.call
      else
        return data
      end
    end

    return default_value.call
  end
end

#custom_attribute(attribute_name) ⇒ Object 



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# File 'lib/cat_forms.rb', line 159

def custom_attribute attribute_name
  class_eval do
    attr_reader attribute_name
  end
end

#form_attribute(name, klass, options = {}) ⇒ Object 



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# File 'lib/cat_forms.rb', line 127

def form_attribute name, klass, options={}
  # Setup the default values for each attribute.
  if !options.has_key?(:default)
    options[:default] =
      if klass.kind_of?(Array)
        []
      elsif klass == BigDecimal or klass == Boolean or klass == CatForms::Boolean
        nil
      elsif klass.respond_to?(:new)
        proc { klass.new }
      else
        nil
      end
  end
  attribute name, klass, options
  if options[:validations]
    validates(name, options[:validations])
  end

  # Define an association_attributes= method
  # Rails's fields_for looks for this.
  if klass.kind_of?(Array)
    define_method "#{name}_attributes=" do |hash|
      hash.each do |_index, opts|
        # If the array is nil, set it to an empty array.
        self.send("#{name}=", []) if self.send(name).nil?
        self.send(name) << klass.first.new(opts)
      end
    end
  end
end

#form_name(name) ⇒ Object 



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# File 'lib/cat_forms.rb', line 91

def form_name name
  name = name.to_s

  def name.i18n_key
    self
  end

  def name.human
    self
  end

  def name.singular
    self
  end

  def name.plural
    self
  end

  def name.param_key
    self
  end

  self.class.instance_eval do
    define_method :model_name do
      name
    end
  end

  self._form_name = name
end

#model_name ⇒ Object 



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# File 'lib/cat_forms.rb', line 123

def model_name
  self._form_name || super
end

#validates_associated(*associations) ⇒ Object 



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# File 'lib/cat_forms.rb', line 165

def validates_associated(*associations)
  validates_each(associations) do |record, _associate_name, value|
    (value.respond_to?(:each) ? value : [value]).each do |rec|
      if rec && !rec.valid?
        rec.errors.each do |key, val|
          record.errors.add(key, val)
        end
      end
    end
  end
end