Partial not accessing local variable - ruby-on-rails-3

I am rendering a partial like so:
<% #pages.each do |page| %>
<%= render 'layouts/pagewithchildren', :locals => { :page => page } %>
<% end %>
But when i try to access a variable in page i am getting the error:
undefined local variable or method `page'
I am accessing the variable like:
<%= page.title %>
So what else do I need to do?

i'm not 100% sure but isn't it either
<%= render 'layouts/pagewithchildren', :page => page %>
or
<%= render :partial => 'layouts/pagewithchildren', :locals => { :page => page } %>
?

You have to explicitly specify partial, otherwise, Rails will treat locals as a params hash, you can access locals[:page] but not page variable directly in your partial.
Change your code to:
<%= render partial:'layouts/pagewithchildren', locals: {page: page} %>

Related

undefined method `model_name' in a partial rendered by different controller

I'm trying to render this form:
<form class="form-inline">
<%= simple_form_for #prospect,
:url => url_for(:action => 'create', :controller => 'prospects'),
:method => 'post' do |f| %>
<%= f.error_notification %>
<%= f.input :name, placeholder: 'Name', label: false %>
<%= f.input :email, placeholder: 'Email', label: false %>
<%= f.input :interests, placeholder: 'Tell us what you were searching for', label: false, value: params[:search] %>
<%= f.error :base %>
<%= f.button :submit, "Submit", :class=> "btn" %>
<% end %>
Using this partial:
<%= render partial: 'prospects/novideo_capture' %>
The partial is in a view controlled by Videos#index controller, and I keep getting this error: 'undefined method `model_name' for NilClass:Class'
This is my prospects controller:
class ProspectsController < ApplicationController
def index
#prospects = Prospect.all
end
def new
#prospect = Prospect.new
end
def create
#prospect = Prospect.new(params[:prospect])
if #prospect.save
render "thanks_for_interest"
else
render "novideo_capture"
end
end
I'm not sure what I'm going wrong, although I'm pretty sure it's a simple solution. I've seen a lot of similar questions around SO and tried all their answers, but none of them seem to work for this situation.
Thanks for any help...
EDIT: Adding
#prospect = Prospect.new
to the videos index controller stops the error occurring, but I don't feel it's the right way to do this. It also doesn't actually make the form use the prospects controller.
EDIT2: I now have the partial rendering correctly (I think), and my videos#index calls the partial like this:
<%= render partial: 'prospects/novideo_capture', :prospect => #prospect %>
Then simple_form in the partial looks like this:
<form class="form-inline">
<%= simple_form_for :prospect,
:url => url_for(:action => 'create', :controller => 'prospects'),
:method => 'post' do |f| %>
...
<% end %>
However it's not actually submitting the form with the prospects controller. Any ideas why?
Check your markup. You're wrapping a simple_form inside another form. Since the first form tag has no action associated with it (<form class="form-inline">), that form will submit against the current URL, which is the video#index.
You're going to want something like this:
<%= simple_form_for :prospect, :url => etc, :method => 'post', :class => "form-inline" do |f|
...
<% end %>
Losing the leading (redundant) form-inline form tag and you'll be fine.

can't pass locals to parital Rails

I have a partial _new_user_form.html.erb
<%= form_for(#user, :remote => true, :html => {:id => 'new_user_form'}) do |f|%>
<strong><%= :form_text %></strong>
<%= f.text_field :email, :placeholder => get_placeholder_text(#board), :size => "30" %>
<%= hidden_field_tag :role, role %>
<%=f.submit "SAVE", :class => "button-small" %>
<% end %>
In the show.rb I want to use it and pass in some partial variables as follows:
<%= render 'users/new_user_form', :locals=> {:role => "Celebrant" } %>
However I get this error:
undefined local variable or method `role' for #<#<Class:0x00000103d5e8b0>:0x00000103d5b930>
I read the documents about passing in locals and this seems correct. What am I doing wrong?
You're combining the short and long forms. Either of these are correct (identical):
render 'my_partial', :foo => 'bar'
render :partial => 'my_partial', :locals => { :foo => 'bar' }
I think you're calling render incorrectly. From the fine manual:
If no options hash is passed or :update specified, the default is to render a partial and use the second parameter as the locals hash.
So you end up going down this branch in the source:
view_renderer.render_partial(self, :partial => options, :locals => locals)
and that makes your call the same as this:
render :partial => 'users/new_user_form', :locals => { :locals => { :role => 'Celebrant } }
Note the extra level of nesting for :locals. Try this:
render 'users/new_user_form', { :role => 'Celebrant' }
I'm looking at (and using) 3.1 so your version might be a little different.

Question about accessing variables inside partials

I want to iterate through an array of objects
<% #users.each do |user| %>
<%= render "member_list" %>
<% end %>
My question is how do I pass the user object to the partial, and how do I reference it in the partial. I know how to do it if it's just a single object, but I don't know how to pass the single object from the array to it.
I tried passing user to it and reference user in the partial, but it doesn't recognize user in the partial.
You might do it without loop - pass it as a :collection parameter. To use a custom local variable name within the partial, specify the :as option in the call to the partial:
<%= render :partial => "member_list", :collection => #users, :as => :member %>
With this change, you can access an instance of the #users collection as the member local variable within the partial.
<% for user in #users %>
<%= render "member_list" , locals => {:user => user}%>
<% end %>
in partial:
Hello. I'm <%= user.name %>

Rendering the Devise edit Password Form

I'm trying to render the Devise edit password form within another view because I don't want to duplicate the edit pw logic.
I've tried the following (after generating the Devise views):
<%= render 'devise/passwords/edit' %>
<%= render 'devise/passwords/form' %>
And a number of other variations on render that all seem to give me the same error:
"ActionView::MissingTemplate in foo#foo
Missing partial devise/passwords/edit..."
This variation:
<%= render :file => 'devise/passwords/edit.html.erb' %>
Gave me some hope but the following error:
"undefined local variable or method `resource' for #<#:0x47ef0e0>"
around this line:
<%= form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { :method => :put }) do |f| %>
That makes me think I'm close (as that is code from the form that I want) but shouldn't that template be using the correct logic from the hidden Devise controller? Or do I need to do something in the routes file to get this to work?
Am I way off?
Try this:
<%= render :template => 'devise/passwords/edit',
:locals => {
:resource => my_user_model_variable,
:resource_name => my_user_model_name } %>
Where:
my_user_model_variable could be current_user
my_user_model_name could be "User"

Rails3 nested layout and partials passing parameters

Hey,
I'm working on a page having a nested layout. first I have the applicationlayout with my "mainmenu" now I want to add a second menu only on this page. I got this working via
<% render :partial => "mypartial", :layout => 'navigation' %>
this adds my second navigation to the form and renders a partial.
At this point I try to distinguish between two different partials. so my file looks like this
<% if :passed_text == "page1" %>
<%= render :partial => "mypartial1", :layout => 'navigation' %>
<% else %>
<%= render :partial => "mypartial2", :layout => 'navigation' %>
<% end %>
my navigation is as follows:
<%= link_to "Mypartial1", partial_path, :passed_text => :page1 %>
<%= link_to "Mypartial2", partial_path, :passed_text => :page2 %>
<%= yield %>
but it ignores my parameters. I guess I'm missing something basic, but all this is new to me.
thanks for your help
okay I found an answer:
first I have to check for:
params[:passed_text]
instead of :passed_text
secondly passing the parameters has to be in brackets
partial_path( :passed_text => :page1)
this works fine