Get a value of object field inside fields_for loop

Question

In the following scenario, I need to check the value of the object property in the fields_for loop.

<%= f.semantic_fields_for :review_details do |rd| %>
  <%= rd.input :review_criteria_id, :as=>:hidden %>
<% end %>

As in the loop, :review_criteria_id is rendered as hidden field, but I have a scenario, where I have to print some more information if it is a specific criteria. How can I get the value of review_criteria_id in the loop. I used:

rd.review_criteria_id

But since rd is the formtastic object, so I couldn't get the value of :review_crieteria_id.

score 74 · Accepted Answer · answered Dec 26 '10 at 20:32

74

Formtastic adds additional features to the Rails code, but doesn't take away existing functionality so the following should work for you:

rd.object.review_criteria_id

'object' can be used in plain Rails form helpers to access the underlying bound object, and Formtastic honours this convention.

answered Dec 26 '10 at 20:32

Scott

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I'd add that you can find this by debugging the view. Adding a debug statement (in this case byebug) `<% byebug %>` inside the `fields_for` block gives a person access to the builder object itself. You can then call `methods` on said class and start investigating. – Tass Jul 06 '16 at 21:49

score 12 · Answer 2 · edited Sep 08 '16 at 19:19

12

I got it, I can use

rd.object.review_criteria_id

object is the default wrapper object for the fields_for loop.

edited Sep 08 '16 at 19:19

Arslan Ali

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answered Dec 26 '10 at 20:35

Nazar Hussain

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Get a value of object field inside fields_for loop

2 Answers2

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