I’m looking for a way to implement a category as a simple marketplace where users can purchase an ad (read post). It looks like the subscriptions plugin will allow a paid addition to a group, and then when the subscription is cancelled, either manually or programmatically, it removes the user. What I’m trying to accomplish is a subscription that will allow a post in a category and then remove them from the group allowed to post. Can this be accomplished either just with the subscriptions plugin, or maybe between subscriptions and automation? Said more simply, I want to sell individual posts. Replies to posts would be free.

I believe this set of permissions would allow what I’m asking given that ‘marketplace’ is the subscription group. [marketplace]

I think you’d need a plugin that would remove them from the group when creating a topic in the ad category. I don’t the the automation plugin will remove users from groups.

Well, I can’t code myself, and since this would be a proof of concept before I could get my boss to support it I don’t have a way to offer any monetary support at this time. Anyone else think something like this would be good for the community? One other consideration, is there any communication between Discourse and the subscriptions plugin that could keep track of how many subs a user has? Would be helpful to allow someone to buy multiple posts at once rather than buy one, then post, then buy another then post again.

[תמונה] tknospdr: this would be a proof of concept before I could get my boss to support it I don’t have a way to offer any monetary support at this time. You’d just have to tell him to use his imagination for the proof of concept. You could likely do it with webhooks and one of those webhook tools like zapier. [תמונה] tknospdr: Would be helpful to allow someone to buy multiple posts at once rather than buy one, then post, then buy another then post again. It would make the plugin more complicated.

[תמונה] pfaffman: It would make the plugin more complicated. For sure, but would be cool to have. Anyway, it looks like this would do the job as long as you hard code the category ID and group name. Can any real coders expand on this so that you can set those variables from the plunin’s settings page? # name: discourse-auto-remove-group # version: 0.1 # authors: tknospdr # url: https://github.com/tknospdr/discourse-auto-remove-group enabled_site_setting :auto_remove_group_enabled # Site setting to enable/disable the plugin register_site_setting :auto_remove_group_enabled, type: :boolean, default: false register_site_setting :auto_remove_group_category_id, type: :integer, default: 0 register_site_setting :auto_remove_group_name, type: :string, default: "" after_initialize do # Listen for post creation events DiscourseEvent.on(:post_created) do |post| next unless SiteSetting.auto_remove_group_enabled next unless post&.user # Ensure post has a user next unless post&.topic&.category_id # Ensure post is in a category target_category_id = SiteSetting.auto_remove_group_category_id group_name = SiteSetting.auto_remove_group_name # Check if the post is in the configured category if post.topic.category_id == target_category_id begin group = Group.find_by(name: group_name) unless group Rails.logger.error("AutoRemoveGroup: Group '#{group_name}' not found") next end user = post.user if group.users.include?(user) group.remove(user) Rails.logger.info("AutoRemoveGroup: Removed user #{user.username} from group #{group_name} after posting in category #{target_category_id}") else Rails.logger.info("AutoRemoveGroup: User #{user.username} is not in group #{group_name}, no action taken") end rescue StandardError => e Rails.logger.error("AutoRemoveGroup: Error removing user from group: #{e.message}") end end end end

That could work! Start with the Discourse-plugin-skeleton, make that your plugin.rb and maybe see what Ask.discourse.com can do to help. And use add_model_callback instead of Discourse.event. You can look in the all_the_plugins repo for some examples.

Both grok and ask.discourse.com say to install the plugin @ /var/discouse/plugins/. Problem is that I don’t have that path, either inside or out of the container. The closest I can find is inside the container I have /var/www/discourse/plugins/. When I try to install it there and rebuild, it disappears. Okay, so the bot says that’s normal for a self hosted install. I don’t know how to set up a proper git repository in order to get the plugin installed the normal way. Can someone help me out with that?

Think I got git going, installed the plugin and got some errors. This is honestly where I’m lost. /var/www/discourse/plugins/discourse-auto-remove-group/plugin.rb:9:in `activate!': undefined method `register_site_setting' for an instance of Plugin::Instance (NoMethodError) You are unable to start Discourse due to errors in the plugin at /var/www/discourse/plugins/discourse-auto-remove-group Please try removing this plugin and rebuilding again! I, [2025-05-20T16:17:10.306025 #1] INFO -- : I, [2025-05-20T16:17:10.347496 #1] INFO -- : Terminating async processes I, [2025-05-20T16:17:10.350251 #1] INFO -- : Sending INT to HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/15/bin/postmaster -D /etc/postgresql/15/main pid: 42 I, [2025-05-20T16:17:10.351238 #1] INFO -- : Sending TERM to exec chpst -u redis -U redis /usr/bin/redis-server /etc/redis/redis.conf pid: 109 2025-05-20 16:17:10.351 UTC [42] LOG: received fast shutdown request 109:signal-handler (1747757830) Received SIGTERM scheduling shutdown... 109:M 20 May 2025 16:17:10.368 # User requested shutdown... 109:M 20 May 2025 16:17:10.369 * Saving the final RDB snapshot before exiting. 2025-05-20 16:17:10.412 UTC [42] LOG: aborting any active transactions 2025-05-20 16:17:10.438 UTC [42] LOG: background worker "logical replication launcher" (PID 56) exited with exit code 1 2025-05-20 16:17:10.438 UTC [51] LOG: shutting down 2025-05-20 16:17:10.447 UTC [51] LOG: checkpoint starting: shutdown immediate 2025-05-20 16:17:10.526 UTC [51] LOG: checkpoint complete: wrote 0 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.001 s, sync=0.001 s, total=0.088 s; sync files=0, longest=0.000 s, average=0.000 s; distance=0 kB, estimate=4 kB 2025-05-20 16:17:10.540 UTC [42] LOG: database system is shut down 109:M 20 May 2025 16:17:10.947 * DB saved on disk 109:M 20 May 2025 16:17:10.947 # Redis is now ready to exit, bye bye... FAILED -------------------- Pups::ExecError: cd /var/www/discourse && su discourse -c 'bundle exec rake db:migrate' failed with return # Location of failure: /usr/local/lib/ruby/gems/3.3.0/gems/pups-1.2.1/lib/pups/exec_command.rb:132:in `spawn' exec failed with the params {"cd"=>"$home", "tag"=>"migrate", "hook"=>"db_migrate", "cmd"=>["su discourse -c 'bundle exec rake db:migrate'"]} bootstrap failed with exit code 1 ** FAILED TO BOOTSTRAP ** please scroll up and look for earlier error messages, there may be more than one. ./discourse-doctor may help diagnose the problem. 9fed9596b10ffb4628947e678585b813813ae27a4de746feba16e89f2b9cdc51

Holy crap! After several more conversations with Ask Discourse and Grok. The plugin is now working. I guess AI really IS useful sometimes. It’s ugly, but confirmed to be working. [The listing under Admin>Plugins] [Crude but workable settings.]

Do you have a development instance set up?

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תמיכה

pfaffman (Jay Pfaffman) 19 במאי,‏ 2025,‏ 11:46pm 5

אני חושב שתצטרך תוסף שיסיר אותם מהקבוצה כשיצרת נושא בקטגוריית הפרסום.

אני לא בטוח שהתוסף האוטומציה יסיר משתמשים מקבוצות.

נושא		תגובות	צפיות
Is it possible to use the subscription plugin to limit creating topics in a category to subscribers? Product Support subscriptions	1	148	18 בפברואר,‏ 2026
Addding a paid group who can reply to topics but not create them Product Support subscriptions	6	470	19 במאי,‏ 2025
Plugin for paid posts Marketplace	3	2021	18 ביולי,‏ 2017
Subscriber group automation (Remove and Add users to specific group with subscription) Feature	1	162	8 באפריל,‏ 2026
Restrict posting in a category until they "like" a topic Product Support automation	13	579	27 בפברואר,‏ 2026

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