rails unable to pass instance variable to partial

Question

I am using Rails 4 for first time. Documentation says you can pass an instance variable to a partial:

<%= render partial: "customer", object: @new_customer %>

So I try to do the same. I am using fullcalendar engine and I render index.html.erb and inside that I render form partial. I pass @record to partial. I know the record is not nil because I added inspect_record helper to inspect that the @record does exist:

<%= render "form", :object => @record  %>
<%= inspect_record @record %>

However, in _form.html.erb partial, the @record is nil, and this condition returns false:

<% unless @record.nil? %>

Note I also tried this:

<%= render 'form', locals: {record: @record} %>

What might I be doing wrong?

instance variables like @this_one defined in the controller's action should be available between the action's view and all partial views used. — MrYoshiji
– MrYoshiji, Commented Aug 21, 2014 at 18:43
Let us see the controller action where you populate @record — JTG
– JTG, Commented Aug 21, 2014 at 18:47
@JTG the issue was that the form was being rendered via an ajax call to a new action, not the index action. — Donato
– Donato, Commented Aug 21, 2014 at 20:12

RAJ · Accepted Answer · 2014-08-21 18:57:45Z

1

If you are using:

<%= render 'form', locals: {record: @record} %>

then, you will need to use variable record instead of @record in your _form.html.erb as:

<% unless record.nil? %>

Description:

locals: {record: @record} means, @record's value will be accessible by using record in the partial being rendered.

edited Aug 21, 2014 at 18:57

answered Aug 21, 2014 at 18:50

RAJ

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5 Comments

Ivan Shamatov Over a year ago

Dan, if this one won't help, thought it should, try adding word partial, <%= render partial: 'form' .... explicitly saying about partial.

RAJ Over a year ago

@IvanShamatov good point, however, the partial is getting called successfully.

Ivan Shamatov Over a year ago

got this issue couple of times, when not adding 'partial' word affected on record, but it might be because of collection partial, or something like that, I cant remember actually.

RAJ Over a year ago

@IvanShamatov totally agree with you... I also have encountered this issue sometimes..

Donato Over a year ago

the issue was that the form was being rendered via an ajax call to a new action, not the index action. The new action does not have an existing @record with an id.

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