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ruby on rails - PUT method form_for

I am using the following to try and set a PUT method on the form but it is still doing a post. I have referred to the docs and it seems like im doing this right.

form_for @firm, html: {autocomplete: "off"}, url: firm_path, method: :put do |f|
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It does this because browsers don't support PUT/DELETE very well. You can read more about this in the Rails Guides:

However, most browsers don’t support methods other than “GET” and “POST” when it comes to submitting forms.

Rails works around this issue by emulating other methods over POST with a hidden input named "_method", which is set to reflect the desired method.


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