Class: Qe::Question

Inherits:
Element
  • Object
show all
Includes:
ActionController::RecordIdentifier
Defined in:
app/models/qe/question.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Element

#all_elements, #duplicate, max_label_length, #position, #ptemplate, #question?, #reuseable?, #set_position

Instance Attribute Details

#answers ⇒ Object

a question has one response per AnswerSheet (that is, an instance of a user filling out the question) generally the response is a single answer however, “Choose Many” (checkbox) questions have multiple answers in a single response



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# File 'app/models/qe/question.rb', line 35

def answers
  @answers
end

Instance Method Details

#default_label? ⇒ Boolean

element view provides the element label with required indicator

Returns:

  • (Boolean) 


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# File 'app/models/qe/question.rb', line 64

def default_label?
  true
end

#display_response(app) ⇒ Object 



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# File 'app/models/qe/question.rb', line 100

def display_response(app)
  r = responses(app)
  if r.blank?
    ""
  else
    r.join(", ")
  end
end

#has_response?(answer_sheet = nil) ⇒ Boolean

has any sort of non-empty response?

Returns:

  • (Boolean) 


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# File 'app/models/qe/question.rb', line 207

def has_response?(answer_sheet = nil)
  if answer_sheet.present?
    answers = responses(answer_sheet)
  else
    answers = Answer.where(:question_id => self.id)
  end
  return false if answers.length == 0
  answers.each do |answer|   # loop through Answers
    value = answer.is_a?(Answer) ? answer.value : answer
    return true if (value.is_a?(FalseClass) && value === false) || value.present? 
  end
  return false
end

#required?(answer_sheet = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/qe/question.rb', line 221

def required?(answer_sheet = nil)
  super() || (!answer_sheet.nil? && !choice_field.nil? && choice_field.has_answer?('1', answer_sheet))
end

#response(app) ⇒ Object

shortcut to return first answer



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# File 'app/models/qe/question.rb', line 96

def response(app)
  responses(app).first.to_s
end

#responses(app) ⇒ Object 



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# File 'app/models/qe/question.rb', line 109

def responses(app)
  return [] unless app
  # try to find answer from external object
  if !object_name.blank? and !attribute_name.blank?
    obj = object_name == 'application' ? app : eval("app." + object_name)
    if obj.nil? or eval("obj." + attribute_name + ".nil?")
      []
    else
      [eval("obj." + attribute_name)] 
    end
  else
    app.answers_by_question[id] || []
    # Answer.where(:answer_sheet_id => app.id, :question_id => self.id)
  end
end

#save_file(answer_sheet, file) ⇒ Object 



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# File 'app/models/qe/question.rb', line 179

def save_file(answer_sheet, file)
  @answers.collect(&:destroy) if @answers
  answer = Answer.create!(:question_id => self.id, :answer_sheet_id => answer_sheet.id, :attachment => file)
end

#save_response(answer_sheet) ⇒ Object

save this question’s @answers to database



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# File 'app/models/qe/question.rb', line 185

def save_response(answer_sheet)
  unless @answers.nil?
    for answer in @answers
      if answer.is_a?(Answer)
        answer.answer_sheet_id = answer_sheet.id
        answer.save!
      end
    end
  end
  
  # remove others
  unless @mark_for_destroy.nil?
    for answer in @mark_for_destroy
      answer.destroy
    end
    @mark_for_destroy.clear
  end
rescue TypeError
  raise answer.inspect
end

#set_response(values, app) ⇒ Object

set answers from posted response



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# File 'app/models/qe/question.rb', line 126

def set_response(values, app)
  values = Array.wrap(values)
  if !object_name.blank? and !attribute_name.blank?
    # if eval("app." + object_name).present?
    object = object_name == 'application' ? app : eval("app." + object_name)
    unless object.present?
      if object_name.include?('.')
        objects = object_name.split('.')
        object = eval("app." + objects[0..-2].join('.') + ".create_" + objects.last)
        eval("app." + objects[0..-2].join('.')).reload
      end
    end
    unless responses(app) == values
      value = ActiveRecord::Base.connection.quote_string(values.first)
      if self.is_a?(DateField) && value.present?
        begin
          value = Date.strptime(value, (I18n.t 'date.formats.default'))
        rescue
          raise "invalid date - " + value.inspect
        end
      end
      object.update_attribute(attribute_name, value) 
    end
    # else
    #   raise object_name.inspect + ' == ' + attribute_name.inspect
    # end
  else
    @answers ||= []
    @mark_for_destroy ||= []
    # go through existing answers (in reverse order, as we delete)
    (@answers.length - 1).downto(0) do |index|
      # reject: skip over responses that are unchanged
      unless values.reject! {|value| value == @answers[index]}
        # remove any answers that don't match the posted values
        @mark_for_destroy << @answers[index]   # destroy from database later 
        @answers.delete_at(index)
      end
    end
  
    # insert any new answers
    for value in values
      if @mark_for_destroy.empty?
        answer = Answer.new(:question_id => self.id)
      else
        # re-use marked answers (an update vs. a delete+insert)
        answer = @mark_for_destroy.pop
      end
      answer.set(value)
      @answers << answer
    end
  end
end

#validation_class(answer_sheet) ⇒ Object

css class names for javascript-based validation



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# File 'app/models/qe/question.rb', line 69

def validation_class(answer_sheet)
  if self.required?(answer_sheet)
    ' required ' 
  else
    ''
  end
end