Adding a form to a plugin

Dev
1

I’m trying to create a simple plugin that

  • adds a form above the topic timeline
  • POSTs email address that user enters to a controller

The form is rendered above the timeline, but when I enter an email and click the submit button, I get this error in the browser console:

DEBUG: -------------------------------
vendor.js:49192 DEBUG: Ember  : 3.15.0
vendor.js:49192 DEBUG: jQuery : 3.6.0
vendor.js:49192 DEBUG: -------------------------------
vendor.js:4180 [Violation] 'setTimeout' handler took 489ms
[Violation] Forced reflow while executing JavaScript took 35ms
vendor.js:49192 DEBUG: For more advanced debugging, install the Ember Inspector from https://chrome.google.com/webstore/detail/ember-inspector/bmdblncegkenkacieihfhpjfppoconhi
user-presence.js:77 [Violation] 'setInterval' handler took 51ms
vendor.js:49170 Uncaught Error: Assertion Failed: <@ember/component:ember716> had no action handler for: lonerWatch
    at assert (vendor.js:49170)
    at Class.send (vendor.js:44642)
    at Class.superWrapper [as send] (vendor.js:43919)
    at Class.send (plugin-connector.js:75)
    at Class.superWrapper [as send] (vendor.js:43919)
    at vendor.js:22103
    at instrument (vendor.js:50635)
    at vendor.js:22102
    at Backburner._run (vendor.js:67048)
    at Backburner._join (vendor.js:67024)

The (currently incomplete) code is:

/assets/javascripts/discourse/templates/connectors/topic-navigation/loner-watch-topic-form.hbs

<form {{ action 'lonerWatch' content on='submit' }}>    
    <p>Enter your email address to watch this topic for updates</p>
    <input name="email" placeholder="Your email"/>
    <button>Watch</button>
</form>

/assets/javascripts/discourse/controllers/loner-watch-topic-form.js.es6

export default Ember.Controller.extend({
    actions: {
      lonerWatch(content) {
        console.log(content);
      }
    }
  });

/controllers/loners_controller.rb

class LonersController < ApplicationController
   [...]
    # Watch topic as a staged user
    def watch
      user = ensure_user
      topic = Topic.find(params[:topic_id].to_i)
      TopicUser.change(user, topic.id, notification_level: params[:notification_level].to_i)
    end
  end

I’m sure I’m missing something simple here, but I’m just not seeing it. Any help is appreciated.

1 Like
2

I just noticed that /assets/javascripts/discourse/controllers should be /assets/javascripts/discourse/components. Unfortunately I still get the same error.

I’m stumped. Does anyone have any ideas what I’m doing wrong here?

3

The connector template and JS file need to be in the same directory and have the same name. So

/assets/javascripts/discourse/connectors/topic-navigation/loner-watch-topic-form.hbs

<form {{ action 'lonerWatch' content on='submit' }}>    
    <p>Enter your email address to watch this topic for updates</p>
    <input name="email" placeholder="Your email"/>
    <button>Watch</button>
</form>

and

/assets/javascripts/discourse/connectors/topic-navigation/loner-watch-topic-form.js

export default {
  actions: {
    lonerWatch(content) {
      console.log(content);
    },
  },
};

Your action should then work. You can read a bit more here if you’re interested.

5 Likes
4

Thanks for the reply. It’s working now. It looks like I had several things wrong, but the worst was erroneously using Ember.Controller.extend when it wasn’t needed.

2 Likes