Rails Add Custom Error Message
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Rails Validation Message
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Errors.add Rails
it only takes a minute: Sign up Fully custom validation error message with Rails up vote 191 down vote favorite 108 Using Rails I'm trying to get an error message like "The song field can't be empty" on save. Doing rails 4 validates presence message the following: validates_presence_of :song_rep_xyz, :message => "can't be empty" ... only displays "Song Rep XYW can't be empty", which is not good because the title of the field is not user friendly. How can I change the title of the field itself ? I could change the actual name of the field in the database, but I have multiple "song" fields and I do need to have specific field names. I don't want to hack around rails' validation process unknown validator: 'messagevalidator' and I feel there should be a way of fixing that. ruby-on-rails share|improve this question edited Jun 14 '10 at 10:08 asked Apr 30 '09 at 19:05 marcgg 33.9k39153210 add a comment| 10 Answers 10 active oldest votes up vote 334 down vote accepted Now, the accepted way to set the humanized names and custom error messages is to use locales. # config/locales/en.yml en: activerecord: attributes: user: email: "E-mail address" errors: models: user: attributes: email: blank: "is required" Now the humanized name and the presence validation message for the "email" attribute have been changed. Validation messages can be set for a specific model+attribute, model, attribute, or globally. share|improve this answer edited Oct 17 '12 at 16:30 answered May 18 '10 at 16:43 graywh 6,30021923 16 If you are using mongoid, replace activerecord: with mongoid: –Intentss Nov 6 '11 at 14:07 83 @graywh: Where should questions about an answer be posted, if not in the comments? Here's the I18n guide: guides.rubyonrails.org/i18n.html –Tyler Rick Dec 15 '11 at 20:45 4 By the way: if you pass a symbol in for the message parameter of your validator in Rails 3.1.3, it will tell you the scope it was looking for as it won't e found, so you know exactly what to put in your locales yml. –aceofspades Feb 14 '12 at 5:46 3 Well, this is fine and all, but what if naively prepending the col
helpers. A minimal implementation could be: class Person # Required dependency for ActiveModel::Errors extend ActiveModel::Naming def initialize @errors = ActiveModel::Errors.new(self) end attr_accessor :name attr_reader :errors def validate! errors.add(:name, :blank, message: "cannot be nil") if name.nil?
Rails Validation Error Message Not Displaying
end # The following methods are needed to be minimally implemented def read_attribute_for_validation(attr) rails 4 validation error message send(attr) end def self.human_attribute_name(attr, options = {}) attr end def self.lookup_ancestors [self] end end The last three methods are required
Rails Validate Message
in your object for Errors to be able to generate error messages correctly and also handle multiple languages. Of course, if you extend your object with ActiveModel::Translation you will not need to http://stackoverflow.com/questions/808547/fully-custom-validation-error-message-with-rails implement the last two. Likewise, using ActiveModel::Validations will handle the validation related methods for you. The above allows you to do: person = Person.new person.validate! # => ["cannot be nil"] person.errors.full_messages # => ["name cannot be nil"] # etc.. Methods # [], []= A add, add_on_blank, add_on_empty, added?, as_json B blank? C clear, count D delete E each, empty? F full_message, full_messages, full_messages_for G generate_message, get http://api.rubyonrails.org/classes/ActiveModel/Errors.html H has_key? I include? K key?, keys M marshal_dump, marshal_load N new S set, size T to_a, to_hash, to_xml V values Included Modules Enumerable Constants CALLBACKS_OPTIONS = [:if, :unless, :on, :allow_nil, :allow_blank, :strict] MESSAGE_OPTIONS = [:message] Attributes [R] details [R] messages Class Public methods new(base) Link Pass in the instance of the object that is using the errors object. class Person def initialize @errors = ActiveModel::Errors.new(self) end end Source: show | on GitHub # File activemodel/lib/active_model/errors.rb, line 72 def initialize(base) @base = base @messages = apply_default_array({}) @details = apply_default_array({}) end Instance Public methods [](attribute) Link When passed a symbol or a name of a method, returns an array of errors for the method. person.errors[:name] # => ["cannot be nil"] person.errors['name'] # => ["cannot be nil"] Note that, if you try to get errors of an attribute which has no errors associated with it, this method will instantiate an empty error list for it and keys will return an array of error keys which includes this attribute. person.errors.keys # => [] person.errors[:name] # => [] person.errors.keys # => [:name] Source: show | on GitHub # File activemodel/lib/active_model/errors.rb, line 172 def [](attribute) messages[attribute.to_sym] end []=(attribute, error
Record Validations and Callbacks Active Record Associations Active Record Query Interface Views Layouts and Rendering in Rails Action View Form Helpers Controllers Action Controller Overview Rails Routing from the Outside http://guides.rubyonrails.org/v3.2.13/active_record_validations_callbacks.html In Digging Deeper Active Support Core Extensions Rails Internationalization API Securing Rails Applications Debugging Rails Applications Performance Testing Rails Applications Configuring Rails Applications Rails Command Line Tools and Rake Tasks Asset Pipeline Extending Rails Rails on Rack Creating and Customizing Rails Generators Contributing to Ruby on Rails Contributing to Ruby on Rails API Documentation Guidelines Ruby on Rails Guides Guidelines Release Notes Ruby on error message Rails 3.2 Release Notes Ruby on Rails 3.1 Release Notes Ruby on Rails 3.0 Release Notes Ruby on Rails 2.3 Release Notes Ruby on Rails 2.2 Release Notes Contribute Credits Active Record Validations and Callbacks This guide teaches you how to hook into the life cycle of your Active Record objects. You will learn how to validate the state of objects before they go into validation error message the database, and how to perform custom operations at certain points in the object life cycle. After reading this guide and trying out the presented concepts, we hope that you'll be able to: Understand the life cycle of Active Record objects Use the built-in Active Record validation helpers Create your own custom validation methods Work with the error messages generated by the validation process Create callback methods that respond to events in the object life cycle Create special classes that encapsulate common behavior for your callbacks Create Observers that respond to life cycle events outside of the original class Chapters The Object Life CycleValidations OverviewWhy Use Validations? When Does Validation Happen? Skipping Validations valid? and invalid? errors[]Validation Helpersacceptance validates_associated confirmation exclusion format inclusion length numericality presence uniqueness validates_with validates_eachCommon Validation Options:allow_nil :allow_blank :message :onConditional ValidationUsing a Symbol with :if and :unless Using a String with :if and :unless Using a Proc with :if and :unless Grouping conditional validationsPerforming Custom ValidationsCustom Validators Custom MethodsWorking with Validation Errorserrors errors[] errors.add errors[:base] errors.clear errors.sizeDisplaying Validation Errors in the Viewerror_messages and error_messages_for Customizing the Error Messages CSS Customizing the Error Messages HTMLCallbacks OverviewCallback RegistrationAvailable Call