Question

and thanks for Help!!

I´m Building my fisrt Rails app, and have this problem:

I made an Scaffold for a Class called “Expediente”, from the index.html.erb I can gain acces over @expedientes but I cant do it from new.html.erb.

Here´s the code:

//index.html.erb, this run great:
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    <% @expedientes.each do |expediente| %>

    <tr>
    <td class="custom"> <%= expediente.id %> </td>

    <td class="custom"> <%= expediente.tipo_expediente %> </td>

    <td class="custom">

<% expediente.pacientes.each do |paciente| %>

    <%= paciente.nombre_completo %><br/>
<% end %>

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//new.html.erb, this doesnt works at all and sends undefined method `each’ for nil:NilClass error message:

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      <% @expedientes.each do |expediente| %>

      <%if expediente.individual?%>

      <% expediente.pacientes.each do |paciente| %>

     <option value=126><%= paciente.nombre_completo %></option>

     <%end%>

     <%end%>  

     <%end%>

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Again thanks fot your Help!!

Answer 1

Because the index action in your ExpedientesController (which renders the index.html.erb view) defines the variable @expedientes, but your new action (which renders the new.html.erb view) does not.