diff options
Diffstat (limited to 'activemodel/lib/active_model/validations/format.rb')
| -rw-r--r-- | activemodel/lib/active_model/validations/format.rb | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/activemodel/lib/active_model/validations/format.rb b/activemodel/lib/active_model/validations/format.rb index 541f53a834..2ec052c74b 100644 --- a/activemodel/lib/active_model/validations/format.rb +++ b/activemodel/lib/active_model/validations/format.rb @@ -4,11 +4,23 @@ module ActiveModel module Validations class FormatValidator < EachValidator def validate_each(record, attribute, value) - if options[:with] && value.to_s !~ options[:with] - record.errors.add(attribute, :invalid, options.except(:with).merge!(:value => value)) - elsif options[:without] && value.to_s =~ options[:without] - record.errors.add(attribute, :invalid, options.except(:without).merge!(:value => value)) + if options[:with] + regexp = options[:with].respond_to?(:call) ? options[:with].call(record) : options[:with] + if regexp.is_a?(Regexp) + record.errors.add(attribute, :invalid, options.except(:with).merge!(:value => value)) if value.to_s !~ regexp + else + raise ArgumentError, "A proc or lambda given to :with option must returns a regular expression" + end + elsif options[:without] + regexp = options[:without].respond_to?(:call) ? options[:without].call(record) : options[:without] + if regexp.is_a?(Regexp) + record.errors.add(attribute, :invalid, options.except(:without).merge!(:value => value)) if value.to_s =~ regexp + else + raise ArgumentError, "A proc or lambda given to :without option must returns a regular expression" + end end + rescue TypeError + raise ArgumentError, "A proc or lambda given to :with or :without option must returns a regular expression" end def check_validity! @@ -16,12 +28,12 @@ module ActiveModel raise ArgumentError, "Either :with or :without must be supplied (but not both)" end - if options[:with] && !options[:with].is_a?(Regexp) - raise ArgumentError, "A regular expression must be supplied as the :with option of the configuration hash" + if options[:with] && !options[:with].is_a?(Regexp) && !options[:with].respond_to?(:call) + raise ArgumentError, "A regular expression or a proc or lambda must be supplied as the :with option of the configuration hash" end - if options[:without] && !options[:without].is_a?(Regexp) - raise ArgumentError, "A regular expression must be supplied as the :without option of the configuration hash" + if options[:without] && !options[:without].is_a?(Regexp) && !options[:without].respond_to?(:call) + raise ArgumentError, "A regular expression or a proc or lambda must be supplied as the :without option of the configuration hash" end end end @@ -40,17 +52,26 @@ module ActiveModel # validates_format_of :email, :without => /NOSPAM/ # end # + # You can also provide a proc or lambda which will determine the regular expression that will be used to validate the attribute + # + # class Person < ActiveRecord::Base + # # Admin can have number as a first letter in their screen name + # validates_format_of :screen_name, :with => lambda{ |person| person.admin? ? /\A[a-z0-9][a-z0-9_\-]*\Z/i : /\A[a-z][a-z0-9_\-]*\Z/i } + # end + # # Note: use <tt>\A</tt> and <tt>\Z</tt> to match the start and end of the string, <tt>^</tt> and <tt>$</tt> match the start/end of a line. # - # You must pass either <tt>:with</tt> or <tt>:without</tt> as an option. In addition, both must be a regular expression, - # or else an exception will be raised. + # You must pass either <tt>:with</tt> or <tt>:without</tt> as an option. In addition, both must be a regular expression + # or a proc or lambda, or else an exception will be raised. # # Configuration options: # * <tt>:message</tt> - A custom error message (default is: "is invalid"). # * <tt>:allow_nil</tt> - If set to true, skips this validation if the attribute is +nil+ (default is +false+). # * <tt>:allow_blank</tt> - If set to true, skips this validation if the attribute is blank (default is +false+). # * <tt>:with</tt> - Regular expression that if the attribute matches will result in a successful validation. + # This can be provided as a proc or lambda returning regular expression which will be called at runtime. # * <tt>:without</tt> - Regular expression that if the attribute does not match will result in a successful validation. + # This can be provided as a proc or lambda returning regular expression which will be called at runtime. # * <tt>:on</tt> - Specifies when this validation is active. Runs in all # validation contexts by default (+nil+), other options are <tt>:create</tt> # and <tt>:update</tt>. |