Render html partial in JSON JBuilder

Question

I am rendering JSON of some students using JBuilder in Rails 4. I want each student to have a "html" attribute that contains the HTML partial for a given student:

[
  { html: "<b>I was rendered from a partial</b>" }
]

I have tried the following:

json.array! @students do |student|
  json.html render partial: 'students/_student', locals: { student: student }
end

But this gives me:

Missing partial students/_student with {:locale=>[:en], :formats=>[:json], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee, :haml]}.

render partial: '/students/student' may not have worked because of that leading /. Try: render partial: 'students/student' — chris, Dec 11 '13 at 16:19

score 25 · Accepted Answer · answered Sep 30 '13 at 19:32

25

You have to specify the partial format as Rails will look for partial with current format (json) by default. For example:

render partial: 'students/student.html.erb'

answered Sep 30 '13 at 19:32

mechanicalfish

12,696
3
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41

I tried `render partial: 'students/student.html.haml'` but got `Missing partial students/stundent.html.haml with {:locale=>[:en], :formats=>[:json], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee, :haml]}.` – Kyle Decot Sep 30 '13 at 19:34
stundent? seems like a typo. If you copied from my answer, I had the same typo there. – mechanicalfish Sep 30 '13 at 19:37

score 7 · Answer 2 · edited Sep 19 '21 at 21:19

7

You need to specify the partial format:

json.array! @students do |student|
  json.html render(student, formats: [:html])
end

edited Sep 19 '21 at 21:19

Dorian

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answered Feb 25 '14 at 20:31

uberllama

18,752
2
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8

json.array! @students do |student| json.html render('student', formats: [:html]) end – territorial Sep 14 '16 at 14:31
thanks, it work fine. ```` json.array! @students do |student| json.html render(student, formats: [:html]) end ```` – territorial Sep 14 '16 at 14:32

score 1 · Answer 3 · answered Jan 16 '18 at 09:53

1

Here's what worked for me:

# students/index.json.jbuilder
json.array! @students do |student|
  json.html render partial: 'student.html.erb', locals: { student: student }
end

# students/_student.html.erb
<h4><%= student.name %></h4>

answered Jan 16 '18 at 09:53

coisnepe

480
8
18

score 0 · Answer 4 · answered Dec 11 '13 at 16:17

0

Rails partials use an underscore in the filename but not in the code when referenced as a string (depending on how you are loading them of course). Usually a partial called posts/_post.html.haml will be referenced in code as render :partial => 'posts/post'

answered Dec 11 '13 at 16:17

chris

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54

the path the partial points to usually refers to a relative path from the app/views folder. – chris Dec 11 '13 at 16:19

Render html partial in JSON JBuilder

4 Answers4