A have two models, "shop" and "product", linked via has_many :through. In the shop form there are nested attributes for multiple products, and I'm having a little trouble with the product's unique...

Here is code which is not working class WeekDay < ActiveRecord::Base validates_inclusion_of :day, :in => %w(sunday monday tuesday wednesday thursday friday saturday), :case_sensitive =>...

I have a Project model which accepts nested attributes for Task. class Project < ActiveRecord::Base has_many :tasks accepts_nested_attributes_for :tasks, :allow_destroy => :true end class...

I have a problem with the scoped uniqueness validation in Rails for nested attributes with a parent of parent. Background I have a rails 4 application with 3 models : #app/models/account.rb cl...

I have a Question class: class Question < ActiveRecord::Base attr_accessible :user_id, :created_on validates_uniqueness_of :created_on, :scope => :user_id end A given user can only crea...

I've got the following (sanitized) models: class Person < ActiveRecord::Base attr_accessible :name, :first_name, :last_name, :age, :job_title, :salary, :ssn, :prison_convictions, :addresses_...

I have the following models, which basically are trying to mean that a professor has knowledge of many subjects for a particular level. The subjects are fixed, so there will be no new subjects crea...

I have the following in my migration file def self.up create_table :payment_agreements do |t| t.boolean :automatic, :default => true, :null => false t.string :payment_trigger_on_order t...

In Rails 2.x you can use validations to make sure you have a unique combined value like this: validates_uniqueness_of :husband, :scope => :wife In the corresponding migration it could look li...

Is there any way I can validate a value updated in a Core Data entity's property against values of the property in other entities in the collection? At the moment I create an entity with some defa...

I have a model that has two fields, which I will call first_name and last_name, and I want to make sure that the combination of the two are case-insensitively unique. I've gotten halfway there by u...

The uniqueness validator of ActiveRecord has an options to skip validation if the value is nil or blank. Even if I set both parameters to true (the default behaviour) I can create one record with n...