Module: Compel::Validation

Extended by:
Validation
Included in:
Validation
Defined in:
lib/compel/validation.rb

Instance Method Summary collapse

Instance Method Details

#validate(value, type, options) ⇒ Object 



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# File 'lib/compel/validation.rb', line 5

def validate(value, type, options)
  # if a value is required and not given,
  # don't do any other validation
  if !!options[:required] && value.nil?
    return ['is required']
  end

  errors = []

  options.each do |option, option_value|
    # most of this code snippet is from sinatra-param gem
    # https://github.com/mattt/sinatra-param
    # by Mattt Thompson (@mattt)
    case option.to_sym
    when :format
      if type == Coercion::String && !value.nil?
        errors << "must match format #{option_value.source}" unless value =~ option_value
      end
    when :is
      errors << "must be #{option_value}" unless value === option_value
    when :in, :within, :range
      errors << "must be within #{option_value}" unless value.nil? || case option_value
      when Range
        option_value.include?(value)
      else
        Array(option_value).include?(value)
      end
    when :min
      errors << "cannot be less than #{option_value}" unless value.nil? || option_value <= value
    when :max
      errors << "cannot be greater than #{option_value}" unless value.nil? || option_value >= value
    when :length
      errors << "cannot have length different than #{option_value}" unless value.nil? || option_value == "#{value}".length
    when :min_length
      unless value.kind_of?(String)
        errors << 'must be a string if using the min_length validation'
      else
        errors << "cannot have length less than #{option_value}" unless value.nil? || option_value <= value.length
      end
    when :max_length
      unless value.kind_of?(String)
        errors << 'must be a string if using the max_length validation'
      else
        errors << "cannot have length greater than #{option_value}" unless value.nil? || option_value >= value.length
      end
    end
  end

  errors
end