getting variable in partial - ruby-on-rails

I've seen the other posts, but can't seem to figure out why this isn't working for me
In my controller I set
#referrer=referrer.name
in my view i have
<%= render 'js', :referrer => #referrer >
then in my partial i put
var type =' <%= referrer >';
I get a response 'undefined local variable or method 'referrer' and it points to the _js file.
from what I can see, this is exactly how it is supposed to be written, what am I doing wrong?

<%= render :partial => "account", :locals => { :referrer => #referrer } %>
Your variables to use in the partial need to be passed via the :locals hash.
Reference: http://api.rubyonrails.org/classes/ActionView/Partials.html
EDIT
The following works perfectly for me:
Controller:
def index
#referrer = "test"
end
index.html.erb
<%= render :partial => "account", :locals => { :referrer => #referrer } %>
_account.html.erb
<%=referrer%>

Turns out the reason was that in the partial, I had to call
var type='<%= #referrer %>'
not sure why all the other documentation i'd seen had it without the # symbol

Related

Getting "Template is missing" error when attempting to render js.erb file

I'm new to Rails, and I'm having an issue where I can't render a .js.erb file. I think the root of the issue is that Rails' internal routing mechanism expects me to name and configure my files just so, but I'm missing one or two pieces, and I'm not sure how to look for what needs to be fixed.
I have an HTML view with a link to a controller action:
<%# snip %>
<div id="holding_issues_list">
<%= link_to "Show issues on hold", {
:action => "show_user_issues",
:controller => "support",
:issue_type => "holding",
:user_id => #user.id },
:remote => true %>
</div>
<%# snip %>
I think (but I'm not sure) that :remote => true causes the link to make an AJAX call.
This is the corresponding controller action in the controller app/controllers/support_controller.rb:
def show_user_issues
#target_div = params[:target_div] || "holding_issues_list"
user = User.find(params[:user_id])
issue_type = params[:issue_type]
#snip - set the value of #issues
end
I want this file, named show_user_issues.js.erb and placed in app/views/support, to be rendered when the controller exits:
$("#<%= #target_div %>").show();
alert('test');
$("#<%= #target_div %>").html(
"<%= escape_javascript render :partial => '_show_user_issues', :locals => {:target_div => #target_div, :issues => #issues} %>");
This is app/views/support/_show_user_issues.html.erb, the partial I want show_user_issues.js.erb to render:
<% for issue in #active_issues %>
<div id="issue_<%= issue.id %>_display">
<%= render :partial => 'show_issue_mini', :locals => {:issue => issue} %>
</div>
<% end %>
When I try clicking the link in my original HTML view, nothing happens. When I open it up in a new tab, I get this error message:
Template is missing
Missing template support/show_user_issues,
application/show_user_issues with {:locale=>[:en],
:handlers=>[:builder, :erb], :formats=>[:html]}. Searched in: *
"/home/<>/app/views" *
"/home/<>/gems/kaminari-0.14.1/app/views"
The alert('test') that I put into show_user_issues.js.erb doesn't show up, so I think that Rails is getting hung up on rendering that file - that is, the routing mechanism can't find it. How can I correct this issue?
P.S. I double-checked that I put in all the file names exactly as they are in the code base.
Change your controller action to handle the type of request.
def show_user_issues
#target_div = params[:target_div] || "holding_issues_list"
user = User.find(params[:user_id])
issue_type = params[:issue_type]
#snip - set the value of #issues
respond_to do |format|
format.js
end
end
This will check the format of the request which is .js in case of :remote => true. So it will handle it by rendering the show_user_issues.js.erb file.
A couple other problems that I ran into after applying Manoj Monga's answer that I suspect other new Rails devs might run into:
In show_user_issues.js.erb, I had
[...].html("<%= escape_javascript render :partial => '_show_user_issues',[...]
The underscore before '_show_user_issues' caused the ERB builder to fail. It should have just been 'show_user_issues'.
In _show_user_issues.html.erb, I had
<% for issue in #active_issues %>
If you look closely at show_user_issues.js.erb, though, I named the variable #issues, not #active_issues:
[...]:locals => {:target_div => #target_div, :issues => #issues}[...]
So I changed the line in the HTML partial to
<% for issue in #issues %>
After these last couple changes, the new functionality I was adding worked as expected.

What's :locals for in render in rails?

Here is the API definition for render:
render(options = {}, locals = {}, &block)
Returns the result of a render that’s dictated by the options hash. The primary options are:
:partial - See ActionView::Partials.
:file - Renders an explicit template file (this used to be the old default), add :locals to pass in those.
:inline - Renders an inline template similar to how it’s done in the controller.
:text - Renders the text passed in out.
There is no explanation about what's the purpose of locals here? What's locals for?
Thanks.
To pass local variables to the partial template, as opposed to controller instance variables.
See Section 3.4.4, Passing Local Variables in the Layouts and Rendering Guide.
For example:
<%= render :partial => "account" %>
This means there is already an instance variable called #account for the partial and you pass it to the partial.
<%= render :partial => "account", :locals => { :account => #buyer } %>
This means you pass a local instance variable called #buyer to the account partial and the variable in the account partial is called #account. I.e., the hash { :account => #buyer } for :locals is just used for passing the local variable to the partial. You can also use the keyword as in the same way:
<%= render :partial => "contract", :as => :agreement
which is the same as:
<%= render :partial => "contract", :locals => { :agreement => #contract }

Issue working with partial in rails

I am using rails 3.1. I have a view products/show.html.erb and I call a partial like this
<%= render 'productrelationships/relatedproduct',:collection => #product.relatedproducts %>
and i access it in this way inside my partial (productrelationship/_relatedproduct)
<% logger.error 'Related Products ' + relatedproduct.inspect %>
The inspect returns a nil. But if I try the same inside my show.html.erb, it is not nil. There is some mistake in passing the value. What am I doing wrong?
Found the answer. It started working when i added :partial while rendering
<%= render :partial => 'productrelationships/relatedproduct',:collection => #product.relatedproducts %>
Need to specify the local variable.
<%= render :partial => 'productrelationships/relatedproduct',
:collection => #product.relatedproducts,
:as => :relatedproduct %>

Partial not rendered via RJS

In my new.html.erb page, i use the following line to render a partial and it works fine.
<%= render :partial => "submissions/player_form", :locals => { :submission => #submission } %>
Now i want to render exactly the same partial via RJS
<p>Player Type: <%= f.select(:PLAYER_TYPE, $playersList, {:prompt => 'Select the Player Type'} %></p>
<%= observe_field("submission_PLAYER_TYPE", :frequency => 1,
:url => { :controller => 'submissions',
:action => :display_player_form },
:with => "'player='+value") %>
display_player_form.rjs:
page.replace_html 'observed_assay_form', :partial => 'submissions/player_form', :locals => {:submission => #submission }
Nothing is displayed!!
Am i missing something??
Thanks for helping me out with this :)
I finally figured it out. So here are my findings:
In the partial, include the form_for tag, just like in the original form--
<% form_for #object do |f| %>
In the action used when observing the field, in my case, 'display_player_form', create a new instance of the object(see below)
#object = Object.new
In your rjs file, enter the following:
page['id of div'].replace_html :partial => 'your_partial_name'
There you go...
Hope this helps
I would rename display_player_form.rjs to display_player_form.js.erb and have its contents look like this:
$("#observed_essay_form").html('<%=
escape_javascript(
render :partial => 'submissions/player_form', :locals => {:submission => #submission }
)
-%>');
$("img[src$='spinner.gif']:visible").hide(); // optional - hide any visible spinner.gif images
I use jQuery, not Prototype, by the way.

Rails partial locals not persisting when sent to another partial as its own local

I render a partial like so:
<%= render :partial => 'widgets/some_partial, :locals => {:foo => 'bar'} %>
So inside of _some_partial.html.erb I render two more partials like so:
<% #foo.nil? #=> false %>
<%= render :partial => 'widgets/another_partial', :locals => {:foo => foo} %>
`<%= render :partial => 'widgets/another_partial_again', :locals => {:foo => foo} %>`
The foo local variable renders fine in some_partial.html.erb and even in another_partial_again.html.erb. However, the foo variable is inaccessible in another_partial.html.erb even though I explicitly passed it in the render call.
What is happening here?
Thanks for the help.
I had the undefined local variable or method error come up for me too when I was rendering a partial with :locals defined.
However, I had a different issue causing my problem, so I thought I would share my solution in case it helps anyone else. (This page was the first result when I googled this error after all)
Basically just make sure you use :partial => 'path/to/partial' in your call to render.
I.e.
<%= render :partial => 'widgets/some_partial', :locals => {:foo => 'bar'} %>
NOT like I was doing:
<%= render 'widgets/some_partial', :locals => {:foo => 'bar'} %>
Easy for a rails/ruby newbie like me to miss.
Solved. Turns out I was also rendering the same partial from the controller without sending the proper local variables. Thanks anyways!!!
Bumped into this very old question cause I faced the same issue.
Turned out that with Rails 4+ if you are not using collections or layout the correct way is:
# Instead of <%= render partial: "account", locals: { account: #buyer } %>
<%= render "account", account: #buyer %>
As documented here.

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