Just wondering why you don't validate the presence/absence of gender_name 
on creation of a new record...


On Sunday, June 14, 2015 at 3:27:56 AM UTC-4, Ruby-Forum.com User wrote:
>
> please help solve the problem. 
>
> There is a table users: 
> id :integer, autoincrement 
> name :string 
> gender_id :integer 
>
> There is a table genders: 
> id :integer, autoincrement 
> gender_name :string 
>
> model User: 
> class User < ActiveRecord::Base 
>   belongs_to  :gender 
> end 
>
> model Gender: 
> class Gender < ActiveRecord::Base 
>   has_many  :users 
> end 
>
> I need the gendername. I try to do so: 
> <% @users.each do |user| %> 
>     <div class="col-xs-6"><%= user.name %></div> 
>     <div class="col-xs-2"><%= user.gender_id %></div> 
> <% end %> 
>
> the result is output number, but I need to gendername 
>
>
>
>
> p.s. 
> so I tried: 
> <div class="col-xs-2"><%= user.gender.gender_name %></div> 
>
> in this case receives the following error message: 
> undefined method `gender_name' for nil:NilClass 
>
> -- 
> Posted via http://www.ruby-forum.com/. 
>

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