Rails form_for method not responding to html options

Question

I have an active model model that I would like to use form_for with.

form_for(@item, url: (params[:action] == 'edit' ? api_item_path(datasheet_id: params[:datasheet_id], item_id: params[:item_id]) : api_items_path), html: {method: (params[:action] == 'edit' ? 'patch' : 'post')}) do |f|

I am choosing the url this way because the named paths have 'api_' prepended. (There is probably a nice way around this, but I hope that this is not part of my problem).

The problem is that the html option with the method key is not affecting the method of the form (which is always 'post').

The model respond_to? :persisted?, so ActionView is correctly naming the form (id="edit_item_xxx", class="edit_item"), but despite that the method remains post.

I hope there is something obvious that I am missing.

Here are the sources that I've used for info: https://github.com/rails/rails/blob/master/actionview/lib/action_view/helpers/form_helper.rb http://guides.rubyonrails.org/form_helpers.html

There's no "patch" method. HTML forms support just `GET` and `POST`. Rails simulates the rest only after the form is submitted via these options. — Jiří Pospíšil, Jan 20 '15 at 16:56

score 4 · Accepted Answer · answered Jan 20 '15 at 16:54

The method parameter should be outside of the html options hash:

form_for(@item, url: (...), method: (...), html: {}) do |f|

I would encourage you to write a helper or a custom form builder object. There is a lot going on for the view here, and it's easy to make mistakes, difficult to test.

Rails form_for method not responding to html options

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