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PORails 3 with composed_of model and validation
 

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    <p>I have this domain model:</p> <pre><code>class Person &lt; ActiveRecord::Base composed_of :address, mapping: [%w(address_street street), %w(address_city city), %w(address_zip_code zip_code), %w(address_country country)] validates :name, presence: true, length: { maximum: 50 } validates :surname, presence: true, length: { maximum: 50 } validates_associated :address end class Address include ActiveModel::Validations include ActiveModel::Conversion extend ActiveModel::Naming attr_reader :street, :city, :zip_code, :country validates :street, presence: true validates :city, presence: true validates :zip_code, presence: true validates :country, presence: true def initialize(street, city, zip_code, country) @street, @city, @zip_code, @country = street, city, zip_code, country end def ==(other_address) street == other_address.street &amp;&amp; city == other_address.city &amp;&amp; zip_code == other_address.zip_code &amp;&amp; country == other_address.country end def persisted? false end end </code></pre> <p>When I try to save an invalid model:</p> <pre><code>&gt; p = Person.new =&gt; #&lt;Person id: nil, name: nil, surname: nil, address_street: nil, address_city: nil, address_zip_code: nil, address_country: nil &gt; p.valid? =&gt; false &gt; p.errors =&gt; {:name=&gt;["can't be blank"], :surname=&gt;["can't be blank"], :address=&gt;["is invalid"]} </code></pre> <p>This is ok, but I would prefer to have the error array filled with the error messages of Address, like this:</p> <pre><code>=&gt; {:name=&gt;["can't be blank"], :surname=&gt;["can't be blank"], :address_street=&gt;["can't be blank"], :address_city=&gt;["can't be blank"], :address_zip_code=&gt;["can't be blank"], :address_country=&gt;["can't be blank"]} </code></pre> <p>The question is: is there a clean Rails way to do it? Or simply I have to move the validation code from Address to Person (pretty ugly)? Any other solution?</p> <p>Thank you very much.</p>
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