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copied!<p>The validations do run from the inherited model.</p> <p>Here's a test case showing that it works.</p> <p>Test case migration:</p> <pre><code>class CreateUser < ActiveRecord::Migration def self.up create_table :users do |t| t.column :name,:string t.column :email, :string t.timestamps end end def self.down drop_table :users end end </code></pre> <p>Test Models:</p> <pre><code>class User < ActiveRecord::Base validates_presence_of :name end class Sub < User validates_presence_of :email end </code></pre> <p>Tests Cases:</p> <p>Creating a sub without either a name or email, save should fail with name,email can't be blank</p> <pre><code>>> b = Sub.create() => #<Sub id: nil, name: nil, email: nil, created_at: nil, updated_at: nil> >> b.save => false >> b.errors => #<ActiveRecord::Errors:0x2457458 @errors={"name"=>["can't be blank"], "email"=>["can't be blank"]}, @base=#<Sub id: nil, name: nil, email: nil, created_at: nil, updated_at: nil>> </code></pre> <p>Creating a sub with no email, save should fail with email can't be blank.</p> <pre><code>>> b = Sub.create(:name=>'test') => #<Sub id: nil, name: "test", email: nil, created_at: nil, updated_at: nil> >> b.save => false >> b.errors => #<ActiveRecord::Errors:0x243865c @errors={"email"=>["can't be blank"]}, @base=#<Sub id: nil, name: "test", email: nil, created_at: nil, updated_at: nil>> </code></pre> <p>Creating a sub with no name, save should fail with name can't be blank.</p> <pre><code>>> b = Sub.create(:email=>'test') => #<Sub id: nil, name: nil, email: "test", created_at: nil, updated_at: nil> >> b.save => false >> b.errors => #<ActiveRecord::Errors:0x2429594 @errors={"name"=>["can't be blank"]}, @base=#<Sub id: nil, name: nil, email: "test", created_at: nil, updated_at: nil>> </code></pre> <p>Creating a sub with name and email, save should succeed.</p> <pre><code>>> b = Sub.create(:email=>'test',:name=>'test') => #<Sub id: 4, name: "test", email: "test", created_at: "2009-10-15 22:27:53", updated_at: "2009-10-15 22:27:53"> >> b.save => true </code></pre>

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