Module: Surveyor::Models::ValidationMethods

Included in:
Validation
Defined in:
lib/surveyor/models/validation_methods.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/surveyor/models/validation_methods.rb', line 4

def self.included(base)
  # Associations
  base.send :belongs_to, :answer
  base.send :has_many, :validation_conditions, :dependent => :destroy

  # Scopes
  
  @@validations_already_included ||= nil
  unless @@validations_already_included
    # Validations
    base.send :validates_presence_of, :rule
    base.send :validates_format_of, :rule, :with => /^(?:and|or|\)|\(|[A-Z]|\s)+$/
    # this causes issues with building and saving
    # base.send :validates_numericality_of, :answer_id
    
    @@validations_already_included = true
  end
  
  # Whitelisting attributes
  base.send :attr_accessible, :answer, :answer_id, :rule, :message
end

Instance Method Details

#conditions_hash(response_set) ⇒ Object

A hash of the conditions (keyed by rule_key) and their evaluation (boolean) in the context of response_set



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# File 'lib/surveyor/models/validation_methods.rb', line 39

def conditions_hash(response_set)
  hash = {}
  response = response_set.responses.detect{|r| r.answer_id.to_i == self.answer_id.to_i}
  # logger.debug "r: #{response.inspect}"
  self.validation_conditions.each{|vc| hash.merge!(vc.to_hash(response))}
  return hash
end

#is_valid?(response_set) ⇒ Boolean

Instance Methods

Returns:

  • (Boolean) 


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# File 'lib/surveyor/models/validation_methods.rb', line 27

def is_valid?(response_set)
  ch = conditions_hash(response_set)
  rgx = Regexp.new(self.validation_conditions.map{|vc| ["a","o"].include?(vc.rule_key) ? "#{vc.rule_key}(?!nd|r)" : vc.rule_key}.join("|")) # exclude and, or
  # logger.debug "v: #{self.inspect}"
  # logger.debug "rule: #{self.rule.inspect}"
  # logger.debug "rexp: #{rgx.inspect}"
  # logger.debug "keyp: #{ch.inspect}"
  # logger.debug "subd: #{self.rule.gsub(rgx){|m| ch[m.to_sym]}}"
  eval(self.rule.gsub(rgx){|m| ch[m.to_sym]})
end