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You may use the :if option when you want to specify when the callback should get called. Contact information - E-Mail: webmaster (at) ruby-forum (dot) com. This makes it especially hard – if you don’t know what something’s called, how do you find more documentation on it? After running the migration and firing up the rails console, I then define a class to go with the model. 1.9.3-p484 :001 have a peek at this web-site

Make me a hexagon! I play with it more and I found a solution which works for polymorphic association at first glance, but there are a few gotchas. As others has said, you also need to make sure you re-populate the @vender variable in your create method before rendering the view. However, the problem is that the update() method does not return true or false.

Rails Validates Not Working

end 15.2 Using :if and :unless with a String You can also use a string that will be evaluated using eval and needs to contain valid Ruby code. blank in Ruby on Rails702Understanding the Rails Authenticity Token0Rails error with validation and multiple models, can't convert HashWithIndifferentAccess into String1022How can I rename a database column in a Ruby on Rails All rights reserved.

Thanks. Drawing a Blank Happily, when an object fails validation, it tells you why: 1.9.3-p484 :009 > c.errors If any before callback method returns exactly false or raises an exception the execution chain gets halted and a ROLLBACK is issued. class Person < ActiveRecord::Base validates_presence_of :name validates_length_of :name, :minimum => 3 end person = Person.new person.valid? # => false person.errors.on(:name) # => ["can't be blank", "is too short (minimum is 3

How can Average Joe create a micro-state that is a member of the UN in the least amount of time? Rails Validates Presence Not Working returns the result of calling #empty? Courage vs. You can do that by using the :if and :unless options, which can take a symbol, a string or a Proc.

Yes. Additionally, database-level validations can safely handle some things (such as uniqueness in heavily-used tables) that can be difficult to implement otherwise. If we ommit it, the record is saved correctly. When i create a scaffold then it works ok but that generates a scaffold.css in public/stylesheets.

  • To get to the View/New it is using vendor/:vendor_id/review/new...so shouldn't I still have the vendor ID in the URL already? –Angela May 5 '09 at 2:33 Sorry but I'm
  • I'm trying to base it as closely as possible on the new product controller/form from the depot demo application in the Rails book, which may have been generated using scaffold.
  • I've read some tutorials and they make it so simple.

Rails Validates Presence Not Working

class Product < ActiveRecord::Base validates_presence_of :description, :value validates_numericality_of :value, :allow_nil => true end <% form_for(@product) do |f| %> <%= f.error_messages %>

<%= f.label :description %>
<%= f.text_field :description %> it would be more correct to use @review.vendor.name instead. (If vendor is optional, then you obviously must catch all vendor.nil? Rails Validates Not Working If any validations fail, the object will be marked as invalid and Active Record will not perform the INSERT or UPDATE operation. Rails Form Validation Errors There problems now are following: Problem 1 Even if the record is created, the attributes are not correctly assigned (:mammal should be true): zoo = Zoo.create(:lions_attributes => [{:name => "Simba", :animal_attributes

The same code works fine in the demo app. Check This Out destroy destroy_all increment! When this option is not used, Active Record will use the respective default error message for each validation helper. 4.4 :on The :on option lets you specify when the validation should D Report post Edit Delete Reply with quote Re: Re: : validates_presence_of not working Cyril Ucron David (Guest) on 2005-12-16 19:07 hmm do you create on instance variable @topic in your Rails Custom Validations

I want it to look like this: def blank? return empty? if respond_to?(:empty?) return false if ::FalseClass Well, why not? Failed updates take me to the welcome action, just like > successful ones. http://pagesetter.net/not-working/link-to-destroy-rails.html and expiration_date < Date.today end def discount_cannot_be_greater_than_total_value errors.add(:discount, "can't be greater than total value") if discount > total_value end end You can even create your own validation helpers and reuse them

This example uses the :message option to show how you can include the attribute's value. All of them accept the :on and :message options, which define when the validation should be run and what message should be added to the errors collection if it fails, respectively. Rails 3.2 convention is what the OP has already got. –sscirrus Jun 1 '13 at 0:19 That works, thanks.

jonsgreen commented Jun 1, 2011 Have you tried using the :inverse_of option on the associations.

class Account < ActiveRecord::Base validates_uniqueness_of :email end The validation happens by performing a SQL query into the model's table, searching for an existing record with the same value in that attribute. And the API docs for these validations don’t mention custom contexts at all! share|improve this answer answered Apr 6 '11 at 7:05 Ajay Singh 88211527 I'm using f.error_messages there. After loading an object and attempting a save, I checked to see if the errors object returned false.

This is the most commonly used option. You could write up a bunch of if statements to do the checking yourself. cases.) share|improve this answer answered Apr 30 '09 at 9:58 Valters Vingolds 1,089914 hmmm...vendor is not optional...you mean to use @review.vendor in the form? –Angela Apr 30 '09 at http://pagesetter.net/not-working/th-rowspan-not-working.html Thanks Report post Edit Delete Reply with quote Re: validates_presence_of not working Dan (Guest) on 2005-12-16 09:53 Steven Smith wrote: > Typically you'd need something like the following in your view

asked 5 years ago viewed 1100 times active 5 years ago Upcoming Events 2016 Community Moderator Election ends in 8 days Blog Stack Overflow Podcast #94 - We Don't Care If Visual indicator when a float is too tall Storing passwords in access-restricted Google spreadsheets? Here then, within the bowels of Ruby’s source code, we find that false and nil are presumed to be exactly the same. i didn't see one (@topic = Topic.new(params[:topic])) this is needed since most of the form tags (text_field, password) and error_messages_for require that a relevant model instance variable be present.

Ironically, because in this case Ruby doesn’t treat false and nil differently, we have to treat strings and booleans differently. on that object. You signed out in another tab or window. I have the stylesheet and all other necessary files that I know of.

valid? Learn more about our Ruby services Contact Us Feeds Atom RSS Authors Uncle bob 71 posts Paul pagel 52 posts Micah martin 49 posts Eric smith 44 posts Doug bradbury 41 Score a hand of Hearts Did the Gang of Four really thoroughly explore "Pattern Space"? Validating Booleans To illustrate my problem, let’s start with a migration: class CreateCustomer < ActiveRecord::Migration def change create_table :customers do

For now, let's turn to the built-in validation helpers that Rails provides by default. 3 Validation Helpers Active Record offers many pre-defined validation helpers that you can use directly inside your W/out scaffold right now i have no stylesheet in the public folder. class Person < ActiveRecord::Base validates_each :name, :surname do |model, attr, value| model.errors.add(attr, 'must start with upper case') if value =~ /\A[a-z]/ end end The block receives the model, the attribute's name What then is Qnil? #define Qnil ((VALUE)RUBY_Qnil) RUBYQnil is defined as an integer.

Home Guides Index Start Here Getting Started with Rails Models Rails Database Migrations Active Record Validations and Callbacks Active Record Associations Active Record Query Interface Views Layouts and Rendering in Rails Just lightweight enough There are a few other ways you could get this kind of validation behavior. If the object does not respond to #empty?, #blank?