NoMethodError Undefined Method `formats` for `modify`:String

Question

I have a method named "modify" inside my PurchaseOrdersController, it also has its template (modify.slim) inside the view directory.

Let say, I'm on this path http://localhost:3000/purchase_orders/modify?prid=1

The problem is when I'm going to click the anchor tag ('/po/1.pdf') which opens newtab, the:

NoMethodError (undefined method formats for "modify":String Did you mean? form_tag):

occurs when I hit refresh the page http://localhost:3000/purchase_orders/modify?prid=1.

Does anyone has the idea how to fix this? I'm using Rails 5.2.1.

Thanks.

UPDATE: please see Rails Logs, Code: Controller, View

Not enough information to debug it, can you show controller and view code for corresponding action. — Anand, Mar 22 '19 at 05:17
Can you provide the full stacktrace for the exception? And the Rails server logs showing where the request was routed before the exception was throw. — Scott Bartell, Mar 22 '19 at 05:18
@Charlie From the stacktrace, what is line 21 in `purchase_orders_controller.rb`? `app/controllers/purchase_orders_controller.rb:21` — Scott Bartell, Mar 22 '19 at 06:02
@ScottBartell, It's `@po = @pr.purchase_orders.first`. You may see it on the link I just added recently, the `def modify` part. — Charlie, Mar 22 '19 at 06:12
Not sure but can you please check replacing the last line in the method with `respond_to do |format| format.html end` — Deepak Mahakale, Mar 22 '19 at 06:15
Are you including any modules inside of a class? https://stackoverflow.com/a/23472072/1298944 — Scott Bartell, Mar 22 '19 at 06:25
@ScottBartell, Yes! `class PurchaseOrderReportPdf < Prawn::Document...end` before that line there is `include ActionView::Helpers`. I removed it and now the error is Gone! Thank you so much!!! :D — Charlie, Mar 22 '19 at 06:32

score 1 · Accepted Answer · answered Mar 22 '19 at 06:36

1

In order for Rails to properly load files, make sure any modules you have included are done so inside the respective class. For example:

class MyClass
  include ActionView::Helpers
end

answered Mar 22 '19 at 06:36

Scott Bartell

1 Answers1