ruby on rails - Insert value corresponding to foreign key in View (executing the application)? -

i'm beginner in rails. while i'm reading documentation , tutorials porting simple application have in production in language (java generated genexus)

i'm building employee shift tracker, have 2 tables: users , shifts, these associations

class user < activerecord::base   has_many :shifts end  class shift < activerecord::base   belongs_to :user end 

i added corresponding user_id in shift model when creating sqlite database.

my problem that, when trying insert new record via new view, "user_id" field doesn't validate correctly valid user_id number try write. i'm supposed insert in field? (in current running application in java field accept user_id value )

when tryng insert value inside "user" field in "shifts" view, following error

user(#63152640) expected, got string(#19315740)

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here's view source

new.html.erb

<h1>new shift</h1>  <%= render 'form' %>  <%= link_to 'back', shifts_path %> 

_form.html.erb

<%= form_for(@shift) |f| %>   <% if @shift.errors.any? %>     <div id="error_explanation">       <h2><%= pluralize(@shift.errors.count, "error") %> prohibited shift being saved:</h2>        <ul>       <% @shift.errors.full_messages.each |msg| %>         <li><%= msg %></li>       <% end %>       </ul>     </div>   <% end %>    <div class="field">     <%= f.label :start %><br />     <%= f.datetime_select :start %>   </div>   <div class="field">     <%= f.label :end %><br />     <%= f.datetime_select :end %>   </div>   <div class="field">     <%= f.label :status %><br />     <%= f.text_field :status %>   </div>   <div class="field">     <%= f.label :user %><br />     <%= f.text_field :user %> //<-- should write here? user_id?   </div>   <div class="actions">     <%= f.submit %>   </div> <% end %> 

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(all of generated scaffolding) also, new action in shifts_controller is

def new  @shift = shift.new end 

i've figured out.

turns out view generated scaffolding, in user field this:

<div class="field">     <%= f.label :user %><br />     <%= f.text_field :user %> //<-- should write here? user_id?   </div> 

i changed :user :user_id , worked. tested writing 1 in user_id field , saved correctly.

then in index.html.erb, changed shift.user in list shift.user.username , list shows me shift belongs user correctly