What is the equivalent of <% debug @variable %> for Haml?

Question

I have an annoying view problem that I'm trying to debug and no where on the Haml Documentation Haml Docs does it specify how to debug view code. This is very annoying and all I need is to debug a variable. Can someone please help me with this? Thank you.

I knew it had to be simple! I kept trying - debug @variable. Thanks...... I feel sheepish now. — Dan Rubio, Jan 21 '15 at 17:06

Andrey Deineko · Accepted Answer · 2016-05-29T21:27:15.233

9

In Haml, to print a result on the page, you use = sign, so in your case it is:

= @variable.inspect

To write a conditional statement, for instance if else, you would use -:

-if condition
  # logic
-else
  #logic

Note, there is no end.

edited May 29 '16 at 21:27

answered Jan 21 '15 at 17:15

Andrey Deineko

51,333
10
112
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Thanks Andrey for distinguishing the difference. Much appreciated. – Dan Rubio Jan 21 '15 at 17:49

score 0 · Answer 2 · answered Jul 03 '19 at 15:34

0

I found it best to put

`= debug(params)`

in your layouts/application.html.haml

answered Jul 03 '19 at 15:34

Aaron Moreno

31
5

score 0 · Answer 3 · answered Apr 21 '21 at 13:25

I just put debugger as below:

= f.input :hardware_configuration, collection: ['screen', 'screen_and_printer', 'printer_only']
= debugger

and it was there:

6:     = f.input :hardware_configuration, collection: ['screen', 'screen_and_printer', 'printer_only']  
7:     = debugger  
(byebug) n

Here you can check whatever variable is there directly(of course which you have declared and assigned in controller).

Note: I have byebug gem installed.

What is the equivalent of <% debug @variable %> for Haml?

3 Answers3