Class: ValidationProfiler::Rules::LengthValidationRule

Inherits:
ValidationRule
  • Object
show all
Defined in:
lib/validation_profiler/rules/length_validation_rule.rb

Instance Method Summary collapse

Methods inherited from ValidationRule

#get_field_value, #is_required?

Instance Method Details

#error_message(field, attributes, parent = nil) ⇒ Object 



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# File 'lib/validation_profiler/rules/length_validation_rule.rb', line 5

def error_message(field, attributes, parent = nil)
  field_name = field.to_s
  if parent != nil
    field_name = "#{parent.to_s}.#{field.to_s}"
  end

  #check if a custom error message has been specified in the attributes
  if attributes[:message] == nil
    #no custom error message has been specified so create the default message.
    min = attributes[:min]
    max = attributes[:max]
    if min && max
      "#{field_name} must have a min length of #{min} and a max length of #{max}"
    elsif min
      "#{field_name} must have a min length of #{min}"
    else
      "#{field_name} must have a max length of #{max}"
    end
  else
    attributes[:message]
  end
end

#validate(obj, field, attributes, parent = nil) ⇒ Object 



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# File 'lib/validation_profiler/rules/length_validation_rule.rb', line 28

def validate(obj, field, attributes, parent = nil)

  min = attributes[:min]
  max = attributes[:max]

  #verify the expected attributes have been specified.
  if min == nil && max == nil
    raise ValidationProfiler::Exceptions::InvalidValidationRuleAttributes.new(ValidationProfiler::Rules::LengthValidationRule, field)
  end

  #attempt to get the field value from the object
  field_value = get_field_value(obj, field)

  #check if this validation check should be skipped
  if !is_required?(field_value, attributes)
    return true
  end

  if field_value.is_a?(Array)
    length = field_value.length
  else
    length = field_value.to_s.length
  end

  #validate the field value
  if min && max
    return length >= min && length <= max
  elsif min
    return length >= min
  elsif max
    return length <= max
  end

  return false
end