how to call javascript from a rails controller action

Question

I have a form and on the submit, it directs to a 'overlap_check' controller action. In the action, if a condition is met from the params that have been sent, i want to render a modal on the page by calling a javascript function. Is this possible?

I've seen some examples using:

# render :js => "('#testing').modal('show');"

But no luck with this.

thanks

demir · Accepted Answer · 2019-08-14 09:52:39Z

2

1) in controller:

def overlap_check
  respond_to do |format|
    format.js
  end
end

2) create overlap_check.js.erb

3) add js code to overlap_check.js.erb

('#testing').modal('show');

4) add remote: true to form

answered Aug 14, 2019 at 9:52

demir

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2 Comments

Michael Evans Over a year ago

I'm trying to do something similar in Rails 7, it seems like this approach no longer works for Rails 7.

demir Over a year ago

Yes, this approach doesn't work in Rails 7. Turbo stream can be used instead.

kishore cheruku · Accepted Answer · 2019-08-14 10:04:15Z

0

Please mention below format in controller action.

respond_to do |format|
        format.js 
end

And create actioname.js.erb in views. There you can call ('#testing').modal('show'); . If you calling controller action by link then add remote: true

<%= link_to your_link_name, path, :remote => true %>

Or If you calling from action then add remote: true in your form

Then it should be work.

edited Aug 14, 2019 at 10:04

answered Aug 14, 2019 at 9:25

kishore cheruku

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5 Comments

b.herring Over a year ago

thanks, i've done this, however im getting an ActionController::UnknownFormat error?

kishore cheruku Over a year ago

how you calling your controller action, By clicking link? or by form submit?

b.herring Over a year ago

i call the controller with form submit

kishore cheruku Over a year ago

Then add remote: true in your form. still if you have doubt then send me your form once.

kishore cheruku Over a year ago

I hope you got solution :) . Happy coding

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