Module: CustomFieldAnswer::Field

Extended by:
ActiveSupport::Concern
Included in:
CustomFieldAnswer
Defined in:
app/models/custom_field_answer/field.rb

Defined Under Namespace

Modules: DateField, NumberField, TextAnswerField

Instance Method Summary collapse

Instance Method Details

#after_initialize ⇒ Object

We need to override after_initialize module to force instance to extend proper module ActiveRecord instances are created sometimes using malloc which will not invoke the initialize but they will call after_initialize



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# File 'app/models/custom_field_answer/field.rb', line 30

def after_initialize
  extend_module
end

#custom_field=(custom_field) ⇒ Object 



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# File 'app/models/custom_field_answer/field.rb', line 5

def custom_field=(custom_field)
  set_custom_field(custom_field)

  extend_module
end

#custom_field_id=(question_id) ⇒ Object

when question_id is assigned extend the module



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# File 'app/models/custom_field_answer/field.rb', line 12

def custom_field_id=(question_id)
  super

  extend_module
end

#extend_module ⇒ Object 



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# File 'app/models/custom_field_answer/field.rb', line 34

def extend_module
  if target_module = module_to_extend
    # Don't include module twice
    kind_of?(target_module) || extend(target_module)

    # Force value coersion for extended module
    #
    # For example
    # if answer is created as shown below
    # case(1)
    # q = NumberQuestion.new
    # a = Answer.new(:question => q, :value => 23.45)
    # a.float_value ==> nil
    # a.value  ==> '23.45'
    #
    # case(2)
    # a = Answer.new(:question => q)
    # a.value = 23.45
    # a.float_value ==> 23.45
    # a.value  ==> '23.45'
    #
    # Above case appears bcoz modules are extended after
    # attributes are assigned. reassign_value method will
    # give the modules to fix this problem please refer
    # to NumberResponse reassign_value
    #
    # Note: currently both cases will work as expected
    reassign_value
  end
end

#initialize(attributes = nil, options = {}) ⇒ Object

Override Answer initialize method to extend proper Response module For example Answer instance whose question is TextFieldQuestion will extend TextFieldResponse



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# File 'app/models/custom_field_answer/field.rb', line 21

def initialize(attributes = nil, options = {})
  super

  extend_module
end

#module_to_extend ⇒ Object

This method will determine which module to extend Answer instances which are created using select might throw exception For example Answer.find(:conditions => [], :select => “value”) retrieve_module_name will throw exception when it tries to access question field This is the only case Answer will fail to extend proper module



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# File 'app/models/custom_field_answer/field.rb', line 70

def module_to_extend
  begin
    CustomFieldAnswer::Field.const_get("#{custom_field.field_type.camelize}Field")
  rescue
    nil
  end
end

#reassign_value ⇒ Object 



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# File 'app/models/custom_field_answer/field.rb', line 78

def reassign_value
  self.value = self.value
end