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authorDavid Heinemeier Hansson <david@loudthinking.com>2008-03-31 23:40:34 +0000
committerDavid Heinemeier Hansson <david@loudthinking.com>2008-03-31 23:40:34 +0000
commit9ddc6143e06cdb3c86d0c954a4fed523e171886c (patch)
tree3e460c4eca70392bdef1c30a36e4e5b9d973bbc6
parentc4be0dbca96797547a9673368d17de22bdec52b7 (diff)
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Something more to work with
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@9171 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
-rw-r--r--activemodel/lib/active_model/deprecated_error_methods.rb38
-rw-r--r--activemodel/lib/active_model/errors.rb80
-rw-r--r--activemodel/lib/active_model/validations.rb687
3 files changed, 804 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/deprecated_error_methods.rb b/activemodel/lib/active_model/deprecated_error_methods.rb
new file mode 100644
index 0000000000..e0cbd9ba29
--- /dev/null
+++ b/activemodel/lib/active_model/deprecated_error_methods.rb
@@ -0,0 +1,38 @@
+module ActiveModel
+ module DeprecatedErrorMethods
+ def on(attribute)
+ ActiveSupport::Deprecation.warn "Errors#on have been deprecated, use Errors#[] instead"
+ self[attribute]
+ end
+
+ def on_base
+ ActiveSupport::Deprecation.warn "Errors#on_base have been deprecated, use Errors#[:base] instead"
+ on(:base)
+ end
+
+ def add(attribute, msg = Errors.default_error_messages[:invalid])
+ ActiveSupport::Deprecation.warn "Errors#add(attribute, msg) has been deprecated, use Errors#[attribute] << msg instead"
+ self[attribute] << msg
+ end
+
+ def add_to_base(msg)
+ ActiveSupport::Deprecation.warn "Errors#add_to_base(msg) has been deprecated, use Errors#[:base] << msg instead"
+ self[:base] << msg
+ end
+
+ def invalid?(attribute)
+ ActiveSupport::Deprecation.warn "Errors#invalid?(attribute) has been deprecated, use Errors#[attribute].any? instead"
+ self[attribute].any?
+ end
+
+ def full_messages
+ ActiveSupport::Deprecation.warn "Errors#full_messages has been deprecated, use Errors#to_a instead"
+ to_a
+ end
+
+ def each_full
+ ActiveSupport::Deprecation.warn "Errors#each_full has been deprecated, use Errors#to_a.each instead"
+ to_a.each { |error| yield error }
+ end
+ end
+end \ No newline at end of file
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
new file mode 100644
index 0000000000..a99bb001e4
--- /dev/null
+++ b/activemodel/lib/active_model/errors.rb
@@ -0,0 +1,80 @@
+module ActiveModel
+ class Errors < Hash
+ include DeprecatedErrorMethods
+
+ @@default_error_messages = {
+ :inclusion => "is not included in the list",
+ :exclusion => "is reserved",
+ :invalid => "is invalid",
+ :confirmation => "doesn't match confirmation",
+ :accepted => "must be accepted",
+ :empty => "can't be empty",
+ :blank => "can't be blank",
+ :too_long => "is too long (maximum is %d characters)",
+ :too_short => "is too short (minimum is %d characters)",
+ :wrong_length => "is the wrong length (should be %d characters)",
+ :taken => "has already been taken",
+ :not_a_number => "is not a number",
+ :greater_than => "must be greater than %d",
+ :greater_than_or_equal_to => "must be greater than or equal to %d",
+ :equal_to => "must be equal to %d",
+ :less_than => "must be less than %d",
+ :less_than_or_equal_to => "must be less than or equal to %d",
+ :odd => "must be odd",
+ :even => "must be even"
+ }
+
+ # Holds a hash with all the default error messages that can be replaced by your own copy or localizations.
+ cattr_accessor :default_error_messages
+
+ alias_method :get, :[]
+ alias_method :set, :[]=
+
+ def [](attribute)
+ if errors = get(attribute.to_sym)
+ errors.size == 1 ? errors.first : errors
+ else
+ set(attribute.to_sym, [])
+ end
+ end
+
+ def []=(attribute, error)
+ self[attribute.to_sym] << error
+ end
+
+ def each
+ each_key do |attribute|
+ self[attribute].each { |error| yield attribute, error }
+ end
+ end
+
+ def size
+ values.flatten.size
+ end
+
+ def to_a
+ inject([]) do |errors_with_attributes, (attribute, errors)|
+ if error.blank?
+ errors_with_attributes
+ else
+ if attr == :base
+ errors_with_attributes << error
+ else
+ errors_with_attributes << (attribute.to_s.humanize + " " + error)
+ end
+ end
+ end
+ end
+
+ def to_xml(options={})
+ options[:root] ||= "errors"
+ options[:indent] ||= 2
+ options[:builder] ||= Builder::XmlMarkup.new(:indent => options[:indent])
+
+ options[:builder].instruct! unless options.delete(:skip_instruct)
+ options[:builder].errors do |e|
+ to_a.each { |error| e.error(error) }
+ end
+ end
+ end
+end \ No newline at end of file
diff --git a/activemodel/lib/active_model/validations.rb b/activemodel/lib/active_model/validations.rb
index e3f6584e2b..72eb668976 100644
--- a/activemodel/lib/active_model/validations.rb
+++ b/activemodel/lib/active_model/validations.rb
@@ -1,4 +1,689 @@
module ActiveModel
module Validations
+ VALIDATIONS = %w( validate validate_on_create validate_on_update )
+
+ def self.included(base) # :nodoc:
+ base.extend(ClassMethods)
+ base.send!(:include, ActiveSupport::Callbacks)
+
+ VALIDATIONS.each do |validation_method|
+ base.class_eval <<-"end_eval"
+ def self.#{validation_method}(*methods, &block)
+ methods = CallbackChain.build(:#{validation_method}, *methods, &block)
+ self.#{validation_method}_callback_chain.replace(#{validation_method}_callback_chain | methods)
+ end
+
+ def self.#{validation_method}_callback_chain
+ if chain = read_inheritable_attribute(:#{validation_method})
+ return chain
+ else
+ write_inheritable_attribute(:#{validation_method}, CallbackChain.new)
+ return #{validation_method}_callback_chain
+ end
+ end
+ end_eval
+ end
+ end
+
+ # All of the following validations are defined in the class scope of the model that you're interested in validating.
+ # They offer a more declarative way of specifying when the model is valid and when it is not. It is recommended to use
+ # these over the low-level calls to validate and validate_on_create when possible.
+ module ClassMethods
+ DEFAULT_VALIDATION_OPTIONS = {
+ :on => :save,
+ :allow_nil => false,
+ :allow_blank => false,
+ :message => nil
+ }.freeze
+
+ ALL_RANGE_OPTIONS = [ :is, :within, :in, :minimum, :maximum ].freeze
+ ALL_NUMERICALITY_CHECKS = { :greater_than => '>', :greater_than_or_equal_to => '>=',
+ :equal_to => '==', :less_than => '<', :less_than_or_equal_to => '<=',
+ :odd => 'odd?', :even => 'even?' }.freeze
+
+ # Adds a validation method or block to the class. This is useful when
+ # overriding the #validate instance method becomes too unwieldly and
+ # you're looking for more descriptive declaration of your validations.
+ #
+ # This can be done with a symbol pointing to a method:
+ #
+ # class Comment < ActiveRecord::Base
+ # validate :must_be_friends
+ #
+ # def must_be_friends
+ # errors.add_to_base("Must be friends to leave a comment") unless commenter.friend_of?(commentee)
+ # end
+ # end
+ #
+ # Or with a block which is passed the current record to be validated:
+ #
+ # class Comment < ActiveRecord::Base
+ # validate do |comment|
+ # comment.must_be_friends
+ # end
+ #
+ # def must_be_friends
+ # errors.add_to_base("Must be friends to leave a comment") unless commenter.friend_of?(commentee)
+ # end
+ # end
+ #
+ # This usage applies to #validate_on_create and #validate_on_update as well.
+
+ # Validates each attribute against a block.
+ #
+ # class Person < ActiveRecord::Base
+ # validates_each :first_name, :last_name do |record, attr, value|
+ # record.errors.add attr, 'starts with z.' if value[0] == ?z
+ # end
+ # end
+ #
+ # Options:
+ # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>allow_nil</tt> - Skip validation if attribute is nil.
+ # * <tt>allow_blank</tt> - Skip validation if attribute is blank.
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_each(*attrs)
+ options = attrs.extract_options!.symbolize_keys
+ attrs = attrs.flatten
+
+ # Declare the validation.
+ send(validation_method(options[:on] || :save), options) do |record|
+ attrs.each do |attr|
+ value = record.send(attr)
+ next if (value.nil? && options[:allow_nil]) || (value.blank? && options[:allow_blank])
+ yield record, attr, value
+ end
+ end
+ end
+
+ # Encapsulates the pattern of wanting to validate a password or email address field with a confirmation. Example:
+ #
+ # Model:
+ # class Person < ActiveRecord::Base
+ # validates_confirmation_of :user_name, :password
+ # validates_confirmation_of :email_address, :message => "should match confirmation"
+ # end
+ #
+ # View:
+ # <%= password_field "person", "password" %>
+ # <%= password_field "person", "password_confirmation" %>
+ #
+ # The added +password_confirmation+ attribute is virtual; it exists only as an in-memory attribute for validating the password.
+ # To achieve this, the validation adds accessors to the model for the confirmation attribute. NOTE: This check is performed
+ # only if +password_confirmation+ is not nil, and by default only on save. To require confirmation, make sure to add a presence
+ # check for the confirmation attribute:
+ #
+ # validates_presence_of :password_confirmation, :if => :password_changed?
+ #
+ # Configuration options:
+ # * <tt>message</tt> - A custom error message (default is: "doesn't match confirmation")
+ # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_confirmation_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:confirmation], :on => :save }
+ configuration.update(attr_names.extract_options!)
+
+ attr_accessor(*(attr_names.map { |n| "#{n}_confirmation" }))
+
+ validates_each(attr_names, configuration) do |record, attr_name, value|
+ record.errors.add(attr_name, configuration[:message]) unless record.send("#{attr_name}_confirmation").nil? or value == record.send("#{attr_name}_confirmation")
+ end
+ end
+
+ # Encapsulates the pattern of wanting to validate the acceptance of a terms of service check box (or similar agreement). Example:
+ #
+ # class Person < ActiveRecord::Base
+ # validates_acceptance_of :terms_of_service
+ # validates_acceptance_of :eula, :message => "must be abided"
+ # end
+ #
+ # If the database column does not exist, the terms_of_service attribute is entirely virtual. This check is
+ # performed only if terms_of_service is not nil and by default on save.
+ #
+ # Configuration options:
+ # * <tt>message</tt> - A custom error message (default is: "must be accepted")
+ # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>allow_nil</tt> - Skip validation if attribute is nil. (default is true)
+ # * <tt>accept</tt> - Specifies value that is considered accepted. The default value is a string "1", which
+ # makes it easy to relate to an HTML checkbox. This should be set to 'true' if you are validating a database
+ # column, since the attribute is typecast from "1" to <tt>true</tt> before validation.
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_acceptance_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:accepted], :on => :save, :allow_nil => true, :accept => "1" }
+ configuration.update(attr_names.extract_options!)
+
+ db_cols = begin
+ column_names
+ rescue ActiveRecord::StatementInvalid
+ []
+ end
+ names = attr_names.reject { |name| db_cols.include?(name.to_s) }
+ attr_accessor(*names)
+
+ validates_each(attr_names,configuration) do |record, attr_name, value|
+ record.errors.add(attr_name, configuration[:message]) unless value == configuration[:accept]
+ end
+ end
+
+ # Validates that the specified attributes are not blank (as defined by Object#blank?). Happens by default on save. Example:
+ #
+ # class Person < ActiveRecord::Base
+ # validates_presence_of :first_name
+ # end
+ #
+ # The first_name attribute must be in the object and it cannot be blank.
+ #
+ # If you want to validate the presence of a boolean field (where the real values are true and false),
+ # you will want to use validates_inclusion_of :field_name, :in => [true, false]
+ # This is due to the way Object#blank? handles boolean values. false.blank? # => true
+ #
+ # Configuration options:
+ # * <tt>message</tt> - A custom error message (default is: "can't be blank")
+ # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ #
+ def validates_presence_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:blank], :on => :save }
+ configuration.update(attr_names.extract_options!)
+
+ # can't use validates_each here, because it cannot cope with nonexistent attributes,
+ # while errors.add_on_empty can
+ send(validation_method(configuration[:on]), configuration) do |record|
+ record.errors.add_on_blank(attr_names, configuration[:message])
+ end
+ end
+
+ # Validates that the specified attribute matches the length restrictions supplied. Only one option can be used at a time:
+ #
+ # class Person < ActiveRecord::Base
+ # validates_length_of :first_name, :maximum=>30
+ # validates_length_of :last_name, :maximum=>30, :message=>"less than %d if you don't mind"
+ # validates_length_of :fax, :in => 7..32, :allow_nil => true
+ # validates_length_of :phone, :in => 7..32, :allow_blank => true
+ # validates_length_of :user_name, :within => 6..20, :too_long => "pick a shorter name", :too_short => "pick a longer name"
+ # validates_length_of :fav_bra_size, :minimum=>1, :too_short=>"please enter at least %d character"
+ # validates_length_of :smurf_leader, :is=>4, :message=>"papa is spelled with %d characters... don't play me."
+ # end
+ #
+ # Configuration options:
+ # * <tt>minimum</tt> - The minimum size of the attribute
+ # * <tt>maximum</tt> - The maximum size of the attribute
+ # * <tt>is</tt> - The exact size of the attribute
+ # * <tt>within</tt> - A range specifying the minimum and maximum size of the attribute
+ # * <tt>in</tt> - A synonym(or alias) for :within
+ # * <tt>allow_nil</tt> - Attribute may be nil; skip validation.
+ # * <tt>allow_blank</tt> - Attribute may be blank; skip validation.
+ #
+ # * <tt>too_long</tt> - The error message if the attribute goes over the maximum (default is: "is too long (maximum is %d characters)")
+ # * <tt>too_short</tt> - The error message if the attribute goes under the minimum (default is: "is too short (min is %d characters)")
+ # * <tt>wrong_length</tt> - The error message if using the :is method and the attribute is the wrong size (default is: "is the wrong length (should be %d characters)")
+ # * <tt>message</tt> - The error message to use for a :minimum, :maximum, or :is violation. An alias of the appropriate too_long/too_short/wrong_length message
+ # * <tt>on</tt> - Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_length_of(*attrs)
+ # Merge given options with defaults.
+ options = {
+ :too_long => ActiveRecord::Errors.default_error_messages[:too_long],
+ :too_short => ActiveRecord::Errors.default_error_messages[:too_short],
+ :wrong_length => ActiveRecord::Errors.default_error_messages[:wrong_length]
+ }.merge(DEFAULT_VALIDATION_OPTIONS)
+ options.update(attrs.extract_options!.symbolize_keys)
+
+ # Ensure that one and only one range option is specified.
+ range_options = ALL_RANGE_OPTIONS & options.keys
+ case range_options.size
+ when 0
+ raise ArgumentError, 'Range unspecified. Specify the :within, :maximum, :minimum, or :is option.'
+ when 1
+ # Valid number of options; do nothing.
+ else
+ raise ArgumentError, 'Too many range options specified. Choose only one.'
+ end
+
+ # Get range option and value.
+ option = range_options.first
+ option_value = options[range_options.first]
+
+ case option
+ when :within, :in
+ raise ArgumentError, ":#{option} must be a Range" unless option_value.is_a?(Range)
+
+ too_short = options[:too_short] % option_value.begin
+ too_long = options[:too_long] % option_value.end
+
+ validates_each(attrs, options) do |record, attr, value|
+ value = value.split(//) if value.kind_of?(String)
+ if value.nil? or value.size < option_value.begin
+ record.errors.add(attr, too_short)
+ elsif value.size > option_value.end
+ record.errors.add(attr, too_long)
+ end
+ end
+ when :is, :minimum, :maximum
+ raise ArgumentError, ":#{option} must be a nonnegative Integer" unless option_value.is_a?(Integer) and option_value >= 0
+
+ # Declare different validations per option.
+ validity_checks = { :is => "==", :minimum => ">=", :maximum => "<=" }
+ message_options = { :is => :wrong_length, :minimum => :too_short, :maximum => :too_long }
+
+ message = (options[:message] || options[message_options[option]]) % option_value
+
+ validates_each(attrs, options) do |record, attr, value|
+ value = value.split(//) if value.kind_of?(String)
+ record.errors.add(attr, message) unless !value.nil? and value.size.method(validity_checks[option])[option_value]
+ end
+ end
+ end
+
+ alias_method :validates_size_of, :validates_length_of
+
+
+ # Validates whether the value of the specified attributes are unique across the system. Useful for making sure that only one user
+ # can be named "davidhh".
+ #
+ # class Person < ActiveRecord::Base
+ # validates_uniqueness_of :user_name, :scope => :account_id
+ # end
+ #
+ # It can also validate whether the value of the specified attributes are unique based on multiple scope parameters. For example,
+ # making sure that a teacher can only be on the schedule once per semester for a particular class.
+ #
+ # class TeacherSchedule < ActiveRecord::Base
+ # validates_uniqueness_of :teacher_id, :scope => [:semester_id, :class_id]
+ # end
+ #
+ # When the record is created, a check is performed to make sure that no record exists in the database with the given value for the specified
+ # attribute (that maps to a column). When the record is updated, the same check is made but disregarding the record itself.
+ #
+ # Because this check is performed outside the database there is still a chance that duplicate values
+ # will be inserted in two parallel transactions. To guarantee against this you should create a
+ # unique index on the field. See +add_index+ for more information.
+ #
+ # Configuration options:
+ # * <tt>message</tt> - Specifies a custom error message (default is: "has already been taken")
+ # * <tt>scope</tt> - One or more columns by which to limit the scope of the uniqueness constraint.
+ # * <tt>case_sensitive</tt> - Looks for an exact match. Ignored by non-text columns (false by default).
+ # * <tt>allow_nil</tt> - If set to true, skips this validation if the attribute is null (default is: false)
+ # * <tt>allow_blank</tt> - If set to true, skips this validation if the attribute is blank (default is: false)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_uniqueness_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:taken] }
+ configuration.update(attr_names.extract_options!)
+
+ validates_each(attr_names,configuration) do |record, attr_name, value|
+ # The check for an existing value should be run from a class that
+ # isn't abstract. This means working down from the current class
+ # (self), to the first non-abstract class. Since classes don't know
+ # their subclasses, we have to build the hierarchy between self and
+ # the record's class.
+ class_hierarchy = [record.class]
+ while class_hierarchy.first != self
+ class_hierarchy.insert(0, class_hierarchy.first.superclass)
+ end
+
+ # Now we can work our way down the tree to the first non-abstract
+ # class (which has a database table to query from).
+ finder_class = class_hierarchy.detect { |klass| !klass.abstract_class? }
+
+ if value.nil? || (configuration[:case_sensitive] || !finder_class.columns_hash[attr_name.to_s].text?)
+ condition_sql = "#{record.class.quoted_table_name}.#{attr_name} #{attribute_condition(value)}"
+ condition_params = [value]
+ else
+ # sqlite has case sensitive SELECT query, while MySQL/Postgresql don't.
+ # Hence, this is needed only for sqlite.
+ condition_sql = "LOWER(#{record.class.quoted_table_name}.#{attr_name}) #{attribute_condition(value)}"
+ condition_params = [value.downcase]
+ end
+
+ if scope = configuration[:scope]
+ Array(scope).map do |scope_item|
+ scope_value = record.send(scope_item)
+ condition_sql << " AND #{record.class.quoted_table_name}.#{scope_item} #{attribute_condition(scope_value)}"
+ condition_params << scope_value
+ end
+ end
+
+ unless record.new_record?
+ condition_sql << " AND #{record.class.quoted_table_name}.#{record.class.primary_key} <> ?"
+ condition_params << record.send(:id)
+ end
+
+ results = finder_class.with_exclusive_scope do
+ connection.select_all(
+ construct_finder_sql(
+ :select => "#{attr_name}",
+ :from => "#{finder_class.quoted_table_name}",
+ :conditions => [condition_sql, *condition_params]
+ )
+ )
+ end
+
+ unless results.length.zero?
+ found = true
+
+ # As MySQL/Postgres don't have case sensitive SELECT queries, we try to find duplicate
+ # column in ruby when case sensitive option
+ if configuration[:case_sensitive] && finder_class.columns_hash[attr_name.to_s].text?
+ found = results.any? { |a| a[attr_name.to_s] == value }
+ end
+
+ record.errors.add(attr_name, configuration[:message]) if found
+ end
+ end
+ end
+
+
+ # Validates whether the value of the specified attribute is of the correct form by matching it against the regular expression
+ # provided.
+ #
+ # class Person < ActiveRecord::Base
+ # validates_format_of :email, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i, :on => :create
+ # end
+ #
+ # Note: use \A and \Z to match the start and end of the string, ^ and $ match the start/end of a line.
+ #
+ # A regular expression must be provided 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 null (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> - The regular expression used to validate the format with (note: must be supplied!)
+ # * <tt>on</tt> Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_format_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save, :with => nil }
+ configuration.update(attr_names.extract_options!)
+
+ raise(ArgumentError, "A regular expression must be supplied as the :with option of the configuration hash") unless configuration[:with].is_a?(Regexp)
+
+ validates_each(attr_names, configuration) do |record, attr_name, value|
+ record.errors.add(attr_name, configuration[:message]) unless value.to_s =~ configuration[:with]
+ end
+ end
+
+ # Validates whether the value of the specified attribute is available in a particular enumerable object.
+ #
+ # class Person < ActiveRecord::Base
+ # validates_inclusion_of :gender, :in => %w( m f ), :message => "woah! what are you then!??!!"
+ # validates_inclusion_of :age, :in => 0..99
+ # validates_inclusion_of :format, :in => %w( jpg gif png ), :message => "extension %s is not included in the list"
+ # end
+ #
+ # Configuration options:
+ # * <tt>in</tt> - An enumerable object of available items
+ # * <tt>message</tt> - Specifies a customer error message (default is: "is not included in the list")
+ # * <tt>allow_nil</tt> - If set to true, skips this validation if the attribute is null (default is: false)
+ # * <tt>allow_blank</tt> - If set to true, skips this validation if the attribute is blank (default is: false)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_inclusion_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:inclusion], :on => :save }
+ configuration.update(attr_names.extract_options!)
+
+ enum = configuration[:in] || configuration[:within]
+
+ raise(ArgumentError, "An object with the method include? is required must be supplied as the :in option of the configuration hash") unless enum.respond_to?("include?")
+
+ validates_each(attr_names, configuration) do |record, attr_name, value|
+ record.errors.add(attr_name, configuration[:message] % value) unless enum.include?(value)
+ end
+ end
+
+ # Validates that the value of the specified attribute is not in a particular enumerable object.
+ #
+ # class Person < ActiveRecord::Base
+ # validates_exclusion_of :username, :in => %w( admin superuser ), :message => "You don't belong here"
+ # validates_exclusion_of :age, :in => 30..60, :message => "This site is only for under 30 and over 60"
+ # validates_exclusion_of :format, :in => %w( mov avi ), :message => "extension %s is not allowed"
+ # end
+ #
+ # Configuration options:
+ # * <tt>in</tt> - An enumerable object of items that the value shouldn't be part of
+ # * <tt>message</tt> - Specifies a customer error message (default is: "is reserved")
+ # * <tt>allow_nil</tt> - If set to true, skips this validation if the attribute is null (default is: false)
+ # * <tt>allow_blank</tt> - If set to true, skips this validation if the attribute is blank (default is: false)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_exclusion_of(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:exclusion], :on => :save }
+ configuration.update(attr_names.extract_options!)
+
+ enum = configuration[:in] || configuration[:within]
+
+ raise(ArgumentError, "An object with the method include? is required must be supplied as the :in option of the configuration hash") unless enum.respond_to?("include?")
+
+ validates_each(attr_names, configuration) do |record, attr_name, value|
+ record.errors.add(attr_name, configuration[:message] % value) if enum.include?(value)
+ end
+ end
+
+ # Validates whether the associated object or objects are all valid themselves. Works with any kind of association.
+ #
+ # class Book < ActiveRecord::Base
+ # has_many :pages
+ # belongs_to :library
+ #
+ # validates_associated :pages, :library
+ # end
+ #
+ # Warning: If, after the above definition, you then wrote:
+ #
+ # class Page < ActiveRecord::Base
+ # belongs_to :book
+ #
+ # validates_associated :book
+ # end
+ #
+ # ...this would specify a circular dependency and cause infinite recursion.
+ #
+ # NOTE: This validation will not fail if the association hasn't been assigned. If you want to ensure that the association
+ # is both present and guaranteed to be valid, you also need to use validates_presence_of.
+ #
+ # Configuration options:
+ # * <tt>message</tt> - A custom error message (default is: "is invalid")
+ # * <tt>on</tt> Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_associated(*attr_names)
+ configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save }
+ configuration.update(attr_names.extract_options!)
+
+ validates_each(attr_names, configuration) do |record, attr_name, value|
+ record.errors.add(attr_name, configuration[:message]) unless
+ (value.is_a?(Array) ? value : [value]).inject(true) { |v, r| (r.nil? || r.valid?) && v }
+ end
+ end
+
+ # Validates whether the value of the specified attribute is numeric by trying to convert it to
+ # a float with Kernel.Float (if <tt>integer</tt> is false) or applying it to the regular expression
+ # <tt>/\A[\+\-]?\d+\Z/</tt> (if <tt>integer</tt> is set to true).
+ #
+ # class Person < ActiveRecord::Base
+ # validates_numericality_of :value, :on => :create
+ # end
+ #
+ # Configuration options:
+ # * <tt>message</tt> - A custom error message (default is: "is not a number")
+ # * <tt>on</tt> Specifies when this validation is active (default is :save, other options :create, :update)
+ # * <tt>only_integer</tt> Specifies whether the value has to be an integer, e.g. an integral value (default is false)
+ # * <tt>allow_nil</tt> Skip validation if attribute is nil (default is false). Notice that for fixnum and float columns empty strings are converted to nil
+ # * <tt>greater_than</tt> Specifies the value must be greater than the supplied value
+ # * <tt>greater_than_or_equal_to</tt> Specifies the value must be greater than or equal the supplied value
+ # * <tt>equal_to</tt> Specifies the value must be equal to the supplied value
+ # * <tt>less_than</tt> Specifies the value must be less than the supplied value
+ # * <tt>less_than_or_equal_to</tt> Specifies the value must be less than or equal the supplied value
+ # * <tt>odd</tt> Specifies the value must be an odd number
+ # * <tt>even</tt> Specifies the value must be an even number
+ # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
+ # not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc or string should return or evaluate to a true or false value.
+ def validates_numericality_of(*attr_names)
+ configuration = { :on => :save, :only_integer => false, :allow_nil => false }
+ configuration.update(attr_names.extract_options!)
+
+
+ numericality_options = ALL_NUMERICALITY_CHECKS.keys & configuration.keys
+
+ (numericality_options - [ :odd, :even ]).each do |option|
+ raise ArgumentError, ":#{option} must be a number" unless configuration[option].is_a?(Numeric)
+ end
+
+ validates_each(attr_names,configuration) do |record, attr_name, value|
+ raw_value = record.send("#{attr_name}_before_type_cast") || value
+
+ next if configuration[:allow_nil] and raw_value.nil?
+
+ if configuration[:only_integer]
+ unless raw_value.to_s =~ /\A[+-]?\d+\Z/
+ record.errors.add(attr_name, configuration[:message] || ActiveRecord::Errors.default_error_messages[:not_a_number])
+ next
+ end
+ raw_value = raw_value.to_i
+ else
+ begin
+ raw_value = Kernel.Float(raw_value.to_s)
+ rescue ArgumentError, TypeError
+ record.errors.add(attr_name, configuration[:message] || ActiveRecord::Errors.default_error_messages[:not_a_number])
+ next
+ end
+ end
+
+ numericality_options.each do |option|
+ case option
+ when :odd, :even
+ record.errors.add(attr_name, configuration[:message] || ActiveRecord::Errors.default_error_messages[option]) unless raw_value.to_i.method(ALL_NUMERICALITY_CHECKS[option])[]
+ else
+ message = configuration[:message] || ActiveRecord::Errors.default_error_messages[option]
+ message = message % configuration[option] if configuration[option]
+ record.errors.add(attr_name, message) unless raw_value.method(ALL_NUMERICALITY_CHECKS[option])[configuration[option]]
+ end
+ end
+ end
+ end
+
+ private
+ def validation_method(on)
+ case on
+ when :save then :validate
+ when :create then :validate_on_create
+ when :update then :validate_on_update
+ end
+ end
+ end
+
+ # The validation process on save can be skipped by passing false. The regular Base#save method is
+ # replaced with this when the validations module is mixed in, which it is by default.
+ def save_with_validation(perform_validation = true)
+ if perform_validation && valid? || !perform_validation
+ save_without_validation
+ else
+ false
+ end
+ end
+
+ # Attempts to save the record just like Base#save but will raise a RecordInvalid exception instead of returning false
+ # if the record is not valid.
+ def save_with_validation!
+ if valid?
+ save_without_validation!
+ else
+ raise RecordInvalid.new(self)
+ end
+ end
+
+ # Updates a single attribute and saves the record without going through the normal validation procedure.
+ # This is especially useful for boolean flags on existing records. The regular +update_attribute+ method
+ # in Base is replaced with this when the validations module is mixed in, which it is by default.
+ def update_attribute_with_validation_skipping(name, value)
+ send(name.to_s + '=', value)
+ save(false)
+ end
+
+ # Runs validate and validate_on_create or validate_on_update and returns true if no errors were added otherwise false.
+ def valid?
+ errors.clear
+
+ run_callbacks(:validate)
+ validate
+
+ if new_record?
+ run_callbacks(:validate_on_create)
+ validate_on_create
+ else
+ run_callbacks(:validate_on_update)
+ validate_on_update
+ end
+
+ errors.empty?
+ end
+
+ # Returns the Errors object that holds all information about attribute error messages.
+ def errors
+ @errors ||= Errors.new(self)
+ end
+
+ protected
+ # Overwrite this method for validation checks on all saves and use Errors.add(field, msg) for invalid attributes.
+ def validate #:doc:
+ end
+
+ # Overwrite this method for validation checks used only on creation.
+ def validate_on_create #:doc:
+ end
+
+ # Overwrite this method for validation checks used only on updates.
+ def validate_on_update # :doc:
+ end
end
-end \ No newline at end of file
+end