# Reactions plugin: 500 Internal Server Error

**URL:** https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746
**Category:** Bug
**Tags:** reactions
**Created:** [October 24, 2022, 5:11am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746 "2022-10-24T05:11:41Z")
**Posts on this page:** 10
**Page:** 1

<div class="post-metadata">

### Author: ![OrkoGrayskull](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/orkograyskull/32/275883_2.png) [@OrkoGrayskull](https://meta.discourse.org/u/OrkoGrayskull)
#### Post date: [October 24, 2022, 5:11am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/1 "2022-10-24T05:11:41Z")

</div>

Good morning community,

when someone clicks on their profile and there clicks activity → reactions, this throws a HTTP 500 Error:

> Server error  
> while loading /discourse-reactions/posts/reactions.json  
> Error code: 500 Internal Server Error

I am using a Discourse Standard installation (2.9.0.beta10/ [c752d68737](https://github.com/discourse/discourse/commits/c752d687377740b3fba07f3f0a1a03101582c816)) with the following plugins:

- [GitHub - discourse/docker\_manager: Plugin for use with discourse docker image · GitHub](https://github.com/discourse/docker_manager)
- [GitHub - discourse/discourse-solved: Allow accepted answers on topics · GitHub](https://github.com/discourse/discourse-solved)
- [GitHub - discourse/discourse-reactions: Moved to https://github.com/discourse/discourse/tree/main/plugins/discourse-reactions · GitHub](https://github.com/discourse/discourse-reactions)
- [GitHub - discourse/discourse-assign: Plugin for assigning users to a topic · GitHub](https://github.com/discourse/discourse-assign)
- [GitHub - discourse/discourse-no-bump: A plugin to prevent users from bumping their own topics · GitHub](https://github.com/discourse/discourse-no-bump)

There seems to be a bug.

---

<div class="post-metadata">

### Author: ![RGJ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/rgj/32/523185_2.png) [@RGJ](https://meta.discourse.org/u/RGJ)
#### Post date: [October 24, 2022, 6:13am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/2 "2022-10-24T06:13:07Z")

</div>

Cannot repro, can you please check `/logs` and post any details about the error here?

---

<div class="post-metadata">

### Author: ![OrkoGrayskull](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/orkograyskull/32/275883_2.png) [@OrkoGrayskull](https://meta.discourse.org/u/OrkoGrayskull)
#### Post date: [October 24, 2022, 6:23am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/3 "2022-10-24T06:23:31Z")

</div>

I can only find one error in /logs:

> NoMethodError (undefined method `title' for nil:NilClass) app/serializers/group_post_serializer.rb:21:in `title’ (eval):7:in `_fast_attributes' lib/freedom_patches/ams_include_without_root.rb:57:in `i

```plaintext
app/serializers/group_post_serializer.rb:21:in `title'
(eval):7:in `_fast_attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:468:in `rescue in attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:455:in `attributes'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:480:in `_serializable_hash'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:359:in `serializable_hash'
active_model_serializers (0.8.4) lib/active_model/serializer/associations.rb:200:in `serialize'
lib/freedom_patches/ams_include_without_root.rb:57:in `include!'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:368:in `block in include_associations!'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:367:in `each_key'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:367:in `include_associations!'
active_model_serializers (0.8.4) lib/active_model/serializer.rb:362:in `serializable_hash'
active_model_serializers (0.8.4) lib/active_model/array_serializer.rb:89:in `block in _serializable_array'
active_model_serializers (0.8.4) lib/active_model/array_serializer.rb:79:in `map'
active_model_serializers (0.8.4) lib/active_model/array_serializer.rb:79:in `_serializable_array'
active_model_serializers (0.8.4) lib/active_model/array_serializer.rb:73:in `serializable_array'
active_model_serializers (0.8.4) lib/active_model/array_serializer.rb:53:in `as_json'
app/controllers/application_controller.rb:519:in `serialize_data'
app/controllers/application_controller.rb:530:in `render_serialized'
plugins/discourse-reactions/app/controllers/discourse_reactions/custom_reactions_controller.rb:54:in `reactions_given'
actionpack (7.0.3.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (7.0.3.1) lib/abstract_controller/base.rb:215:in `process_action'
actionpack (7.0.3.1) lib/action_controller/metal/rendering.rb:53:in `process_action'
actionpack (7.0.3.1) lib/abstract_controller/callbacks.rb:234:in `block in process_action'
activesupport (7.0.3.1) lib/active_support/callbacks.rb:118:in `block in run_callbacks'
app/controllers/application_controller.rb:413:in `block in with_resolved_locale'
i18n (1.12.0) lib/i18n.rb:322:in `with_locale'
app/controllers/application_controller.rb:413:in `with_resolved_locale'
activesupport (7.0.3.1) lib/active_support/callbacks.rb:127:in `block in run_callbacks'
activesupport (7.0.3.1) lib/active_support/callbacks.rb:138:in `run_callbacks'
actionpack (7.0.3.1) lib/abstract_controller/callbacks.rb:233:in `process_action'
actionpack (7.0.3.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (7.0.3.1) lib/action_controller/metal/instrumentation.rb:67:in `block in process_action'
activesupport (7.0.3.1) lib/active_support/notifications.rb:206:in `block in instrument'
activesupport (7.0.3.1) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (7.0.3.1) lib/active_support/notifications.rb:206:in `instrument'
actionpack (7.0.3.1) lib/action_controller/metal/instrumentation.rb:66:in `process_action'
actionpack (7.0.3.1) lib/action_controller/metal/params_wrapper.rb:259:in `process_action'
activerecord (7.0.3.1) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (7.0.3.1) lib/abstract_controller/base.rb:151:in `process'
actionview (7.0.3.1) lib/action_view/rendering.rb:39:in `process'
rack-mini-profiler (3.0.0) lib/mini_profiler/profiling_methods.rb:111:in `block in profile_method'

actionpack (7.0.3.1) lib/action_controller/metal.rb:188:in `dispatch'
actionpack (7.0.3.1) lib/action_controller/metal.rb:251:in `dispatch'
actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:49:in `dispatch'
actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:32:in `serve'
actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:50:in `block in serve'
actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:852:in `call'
railties (7.0.3.1) lib/rails/engine.rb:530:in `call'
railties (7.0.3.1) lib/rails/railtie.rb:226:in `public_send'
railties (7.0.3.1) lib/rails/railtie.rb:226:in `method_missing'
actionpack (7.0.3.1) lib/action_dispatch/routing/mapper.rb:19:in `block in <class:Constraints>'
actionpack (7.0.3.1) lib/action_dispatch/routing/mapper.rb:48:in `serve'
actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:50:in `block in serve'
actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:852:in `call'
lib/middleware/omniauth_bypass_middleware.rb:71:in `call'
rack (2.2.4) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.4) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.4) lib/rack/head.rb:12:in `call'
actionpack (7.0.3.1) lib/action_dispatch/http/permissions_policy.rb:38:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:368:in `call'
rack (2.2.4) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.4) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/cookies.rb:697:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (7.0.3.1) lib/active_support/callbacks.rb:99:in `run_callbacks'
actionpack (7.0.3.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/debug_exceptions.rb:28:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/show_exceptions.rb:26:in `call'
logster (2.11.3) lib/logster/middleware/reporter.rb:43:in `call'
railties (7.0.3.1) lib/rails/rack/logger.rb:40:in `call_app'
railties (7.0.3.1) lib/rails/rack/logger.rb:27:in `call'
config/initializers/100-quiet_logger.rb:23:in `call'
config/initializers/100-silence_logger.rb:31:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/remote_ip.rb:93:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/request_id.rb:26:in `call'
lib/middleware/enforce_hostname.rb:23:in `call'
rack (2.2.4) lib/rack/method_override.rb:24:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
rack (2.2.4) lib/rack/sendfile.rb:110:in `call'
actionpack (7.0.3.1) lib/action_dispatch/middleware/host_authorization.rb:131:in `call'
rack-mini-profiler (3.0.0) lib/mini_profiler/profiler.rb:393:in `call'

message_bus (4.2.0) lib/message_bus/rack/middleware.rb:60:in `call'
lib/middleware/request_tracker.rb:202:in `call'
railties (7.0.3.1) lib/rails/engine.rb:530:in `call'
railties (7.0.3.1) lib/rails/railtie.rb:226:in `public_send'
railties (7.0.3.1) lib/rails/railtie.rb:226:in `method_missing'
rack (2.2.4) lib/rack/urlmap.rb:74:in `block in call'
rack (2.2.4) lib/rack/urlmap.rb:58:in `each'
rack (2.2.4) lib/rack/urlmap.rb:58:in `call'
unicorn (6.1.0) lib/unicorn/http_server.rb:634:in `process_client'
unicorn (6.1.0) lib/unicorn/http_server.rb:739:in `worker_loop'
unicorn (6.1.0) lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
unicorn (6.1.0) lib/unicorn/http_server.rb:143:in `start'
unicorn (6.1.0) bin/unicorn:128:in `<top (required)>'
vendor/bundle/ruby/2.7.0/bin/unicorn:25:in `load'
vendor/bundle/ruby/2.7.0/bin/unicorn:25:in `<main>'

```

The rest are just warnings that have nothing to do with the 500 error. In any case, I have not found anything that indicates this.

---

<div class="post-metadata">

### Author: ![Don](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/don/32/228726_2.png) [@Don](https://meta.discourse.org/u/Don)
#### Post date: [October 24, 2022, 6:58am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/4 "2022-10-24T06:58:14Z")

</div>

Hello,

I can repro this but don’t know yet what cause it exactly. On my test site, it works on some users but others not.

Console errors:

 ![Screenshot 2022-10-24 at 8.56.28](https://global.discourse-cdn.com/meta/original/4X/5/d/b/5db2b8835e12a4fb2398f9f52d80830fe04806ae.png)

---

<div class="post-metadata">

### Author: ![OrkoGrayskull](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/orkograyskull/32/275883_2.png) [@OrkoGrayskull](https://meta.discourse.org/u/OrkoGrayskull)
#### Post date: [October 24, 2022, 7:56am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/5 "2022-10-24T07:56:49Z")

</div>

Yeah, true. For some users it works, for others not.

---

<div class="post-metadata">

### Author: ![JammyDodger](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/jammydodger/32/254611_2.png) [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [October 24, 2022, 7:59am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/6 "2022-10-24T07:59:05Z")

</div>

I can’t replicate this so far. Is there anything special about those users or their reactions? Or any semi-related admin settings that may have been tweaked?

---

<div class="post-metadata">

### Author: ![Don](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/don/32/228726_2.png) [@Don](https://meta.discourse.org/u/Don)
#### Post date: [October 24, 2022, 9:24am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/7 "2022-10-24T09:24:43Z")

</div>

Ok finally I think I have a clean repro for this: I think this is happens when the user has reaction in one of the not deleted post in a deleted topic (OP).

Repro:

1. Add reaction to OP and the second post.  

2. Check the **Test1** user `activity/reactions` page it works now as expected  

3. Delete only the topic OP with delete topic button so the second post not deleted.  

4. Check the **Test1** user `activity/reactions` page again drop a 500 error because I think the route is broken.  

5. Un-Delete the topic or delete the post too will recover the `activity/reactions` page.

* * *

It also happens with deleted category if the About the … category topic has reactions. I think because the actual post not deleted.

1. Add a reaction with **Test1** user in the **Test Subcategory** category.  

2. Check the **Test1** user `activity/reactions` page works as expexted  

3. Delete **Test Subcategory** category.

4. Check the **Test1** user `activity/reactions` page again will drop a 500 error because the reaction left on the OP and the route is broken.

---

<div class="post-metadata">

### Author: ![j.jaffeux](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/j.jaffeux/32/60297_2.png) [@j.jaffeux](https://meta.discourse.org/u/j.jaffeux)
#### Post date: [October 24, 2022, 10:35am UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/9 "2022-10-24T10:35:34Z")

</div>

Thanks for report 👍

I have a fix under review for this, will let you know when merged.

---

<div class="post-metadata">

### Author: ![j.jaffeux](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/j.jaffeux/32/60297_2.png) [@j.jaffeux](https://meta.discourse.org/u/j.jaffeux)
#### Post date: [October 25, 2022, 1:02pm UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/10 "2022-10-25T13:02:05Z")

</div>

That should fix it: [FIX: deleted topic should exclude it from reactions given by jjaffeux · Pull Request #191 · discourse/discourse-reactions · GitHub](https://github.com/discourse/discourse-reactions/pull/191)

Let me know how it goes for you please.

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<div class="post-metadata">

### Author: ![j.jaffeux](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/j.jaffeux/32/60297_2.png) [@j.jaffeux](https://meta.discourse.org/u/j.jaffeux)
#### Post date: [October 28, 2022, 1:02pm UTC](https://meta.discourse.org/t/reactions-plugin-500-internal-server-error/242746/11 "2022-10-28T13:02:34Z")

</div>

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