Combo Select Filter Data

Rails
1

Hi, this is my second post ( sorry for my language )

need yours helps with my problem.
i need filter my model by an option in a Combo select

i thing, “i should be” with observe_field and render partial, but i have
a problem, when past to the second page, the application give me an
error. about ID

thx for your helps!

2

David,

Could you post the code that you are using as well as the error message
that it’s returning?

David navarrete David wrote:

Hi, this is my second post ( sorry for my language )

need yours helps with my problem.
i need filter my model by an option in a Combo select

i thing, “i should be” with observe_field and render partial, but i have
a problem, when past to the second page, the application give me an
error. about ID

thx for your helps!

3

*** controller **
def filtro
if !params[:filtro][:campo].nil?
tipo_filtro = params[:filtro][:campo]
@inmobiliaria = Inmobiliaria.find(params[:id])
proyecto = @inmobiliaria.proyectos_inmobiliarios.find(:all,
:conditions => [‘tipo_propiedad_id = ?’,tipo_filtro])
end
@proyectos = proyecto.paginate :page => params[:page], :per_page =>
10
@numero_proyectos = proyecto.size
render :partial => “resultado_inmobiliaria”, :layout => false,
:object => @proyectos
end

*** show **
<% form_for ‘filtro’, :url => {:action => :filtro, :id => params[:id]}
do |f| %>
<%= f.select :campo,
@tipos_propiedades.collect {|p| [ p.descripcion, p.id ] },{
:prompt => ‘Seleccione Filtro’}, {:onchange => “submit();”} %>
<%= f.submit “asd”%>

<% end %>

<%= render :action => "resultado_inmobiliaria" %>
** show **

thx

4

ups the error

You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]

5

try:

if params[:filtro] && !params[:filtro][:campo].nil?
…

or

if (params[:filtro][:campo] rescue false)

if there’s no params[:filtro], the chained call to [:campo] will cause
that error.

On Aug 27, 5:48 pm, David navarrete David <rails-mailing-l…@andreas-