# Can't sign in as admin user (undefined method \`username' for nil:NilClass)

**URL:** https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169
**Category:** Support
**Created:** [Août 16, 2017, 5:55 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169 "2017-08-16T17:55:38Z")
**Posts on this page:** 11
**Page:** 1

<div class="post-metadata">

### Author: ![almone](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/almone/32/120777_2.png) [@almone](https://meta.discourse.org/u/almone)
#### Post date: [Août 16, 2017, 5:55 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/1 "2017-08-16T17:55:38Z")

</div>

I’m having an issue with logging in as admin user.  
I made a clean Vagrant install according to [this guide](https://github.com/discourse/discourse/blob/master/docs/VAGRANT.md).  
Now when I try to log in I’m getting 500 Internal Server Error.

Here are log records:

```
I, [2017-08-16T13:50:13.258735 #14047] INFO -- : Started GET "/" for 10.0.2.2 at 2017-08-16 13:50:13 -0400
D, [2017-08-16T13:50:14.494951 #14047] DEBUG -- : UserAuthToken Load (1.5ms) SELECT "user_auth_tokens".* FROM "user_auth_tokens" WHERE ((auth_token = 'St0sllamsnLV2NjCPEschUDeDzQ=' OR
                          prev_auth_token = 'St0sllamsnLV2NjCPEschUDeDzQ=' OR
                          (auth_token = '4716df97e4a99a37b3d9b8a8f34af626' AND legacy)) AND rotated_at > '2017-06-17 17:50:14.492802') LIMIT 1
D, [2017-08-16T13:50:14.505749 #14047] DEBUG -- : User Load (2.7ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1 [["id", 1]]
I, [2017-08-16T13:50:14.510414 #14047] INFO -- : Processing by ListController#latest as HTML
D, [2017-08-16T13:50:14.527868 #14047] DEBUG -- : UserOption Load (1.0ms) SELECT "user_options".* FROM "user_options" WHERE "user_options"."user_id" = 1 LIMIT 1 [["user_id", 1]]
D, [2017-08-16T13:50:14.534377 #14047] DEBUG -- : UserVisit Load (1.3ms) SELECT "user_visits".* FROM "user_visits" WHERE "user_visits"."user_id" = 1 AND "user_visits"."visited_at" = '2017-08-16' LIMIT 1 [["user_id", 1], ["visited_at", Wed, 16 Aug 2017]]
D, [2017-08-16T13:50:14.553588 #14047] DEBUG -- : SQL (3.5ms) UPDATE "users" SET "last_seen_at" = '2017-08-16 17:50:14.509563' WHERE "users"."id" = 1 [["id", 1]]
D, [2017-08-16T13:50:14.560300 #14047] DEBUG -- : (3.9ms) SELECT categories.id FROM "categories" LEFT OUTER JOIN "uploads" ON "uploads"."id" = "categories"."uploaded_logo_id" LEFT OUTER JOIN "uploads" "uploaded_backgrounds_categories" ON "uploaded_backgrounds_categories"."id" = "categories"."uploaded_background_id" WHERE "categories"."read_restricted" = 't' [["read_restricted", true]]
D, [2017-08-16T13:50:14.569177 #14047] DEBUG -- : Category Load (4.5ms) SELECT categories.*, t.slug topic_slug FROM "categories" LEFT JOIN topics t on t.id = categories.topic_id WHERE (NOT categories.read_restricted OR categories.id IN (2,3,4)) ORDER BY "categories"."position" ASC
D, [2017-08-16T13:50:14.580481 #14047] DEBUG -- : (0.9ms) SELECT "category_users"."category_id", "category_users"."notification_level" FROM "category_users" WHERE "category_users"."user_id" = 1
D, [2017-08-16T13:50:14.585194 #14047] DEBUG -- : (1.4ms) SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM "topics" WHERE ("topics"."deleted_at" IS NULL) LIMIT 16) subquery_for_count
D, [2017-08-16T13:50:14.591761 #14047] DEBUG -- : (1.6ms) SELECT "users"."id" FROM "users" INNER JOIN "user_auth_tokens" ON "user_auth_tokens"."user_id" = "users"."id" WHERE "users"."admin" = 't' AND (users.id > 0) ORDER BY user_auth_tokens.created_at [["admin", true]]
D, [2017-08-16T13:50:14.597011 #14047] DEBUG -- : Topic Load (1.5ms) SELECT "topics".* FROM "topics" WHERE ("topics"."deleted_at" IS NULL) AND "topics"."slug" = 'welcome-to-discourse' ORDER BY "topics"."id" ASC LIMIT 1 [["slug", "welcome-to-discourse"]]
D, [2017-08-16T13:50:14.602911 #14047] DEBUG -- : User Load (1.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = -1 LIMIT 1 [["id", -1]]
D, [2017-08-16T13:50:14.608340 #14047] DEBUG -- : CACHE (0.0ms) SELECT COUNT(count_column) FROM (SELECT 1 AS count_column FROM "topics" WHERE ("topics"."deleted_at" IS NULL) LIMIT 16) subquery_for_count
D, [2017-08-16T13:50:14.613361 #14047] DEBUG -- : (1.8ms) SELECT "users"."id" FROM "users" INNER JOIN "user_auth_tokens" ON "user_auth_tokens"."user_id" = "users"."id" WHERE "users"."admin" = 't' AND (users.id > 0) ORDER BY user_auth_tokens.created_at [["admin", true]]
D, [2017-08-16T13:50:14.616927 #14047] DEBUG -- : CACHE (0.0ms) SELECT "topics".* FROM "topics" WHERE ("topics"."deleted_at" IS NULL) AND "topics"."slug" = 'welcome-to-discourse' ORDER BY "topics"."id" ASC LIMIT 1 [["slug", "welcome-to-discourse"]]
D, [2017-08-16T13:50:14.620538 #14047] DEBUG -- : CACHE (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = -1 LIMIT 1 [["id", -1]]
I, [2017-08-16T13:50:14.624538 #14047] INFO -- : Completed 500 Internal Server Error in 101ms (ActiveRecord: 26.5ms)
I, [2017-08-16T13:50:14.744330 #14047] INFO -- : Rendered /home.rvm/gems/ruby-2.3.1/gems/actionpack-4.2.9/lib/action_dispatch/middleware/templates/rescues/_source.erb (9.6ms)
I, [2017-08-16T13:50:14.755912 #14047] INFO -- : Rendered /home.rvm/gems/ruby-2.3.1/gems/actionpack-4.2.9/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (6.0ms)
I, [2017-08-16T13:50:14.765246 #14047] INFO -- : Rendered /home.rvm/gems/ruby-2.3.1/gems/actionpack-4.2.9/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (2.5ms)
I, [2017-08-16T13:50:14.769481 #14047] INFO -- : Rendered /home.rvm/gems/ruby-2.3.1/gems/actionpack-4.2.9/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (38.0ms)

```

And debug info:

 ![2017-08-16_20-53-57](https://global.discourse-cdn.com/meta/original/3X/b/d/bd031cd6519e810c728922e29bdbc2b44c36b342.jpg)

---

<div class="post-metadata">

### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld)
#### Post date: [Août 16, 2017, 11:14 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/2 "2017-08-16T23:14:07Z")

</div>

Can you try running `rake db:migrate`? The system user is missing on your installation for some reason.

---

<div class="post-metadata">

### Author: ![almone](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/almone/32/120777_2.png) [@almone](https://meta.discourse.org/u/almone)
#### Post date: [Août 17, 2017, 7:19 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/3 "2017-08-17T07:19:27Z")

</div>

This is what I get after running `rake db:migrate`:

```
vagrant@discourse:/vagrant$ rake db:migrateake db:migrate
== Seed from /vagrant/db/fixtures/001_categories.rb
Removing superflous categories columns!
rake aborted!
LoadError: Unable to autoload constant Version, expected /vagrant/lib/version.rb to define it
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:46:in `eval'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/active_support.rb:53:in `block in load_missing_constant'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/active_support.rb:6:in `with_bootsnap_fallback'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/active_support.rb:53:in `load_missing_constant'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:184:in `const_missing'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/inflector/methods.rb:261:in `const_get'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/inflector/methods.rb:261:in `block in constantize'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/inflector/methods.rb:259:in `each'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/inflector/methods.rb:259:in `inject'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/inflector/methods.rb:259:in `constantize'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activesupport-4.2.9/lib/active_support/core_ext/string/inflections.rb:66:in `constantize'
/vagrant/lib/discourse.rb:451:in `block in reset_active_record_cache'
/vagrant/lib/discourse.rb:450:in `each'
/vagrant/lib/discourse.rb:450:in `reset_active_record_cache'
/vagrant/lib/column_dropper.rb:42:in `drop'
(eval):29:in `block (2 levels) in run_file'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:46:in `eval'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:46:in `block (2 levels) in run_file'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:58:in `block in open'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:57:in `open'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:57:in `open'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:36:in `block in run_file'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activerecord-4.2.9/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `block in transaction'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activerecord-4.2.9/lib/active_record/connection_adapters/abstract/transaction.rb:184:in `within_new_transaction'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activerecord-4.2.9/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/activerecord-4.2.9/lib/active_record/transactions.rb:220:in `transaction'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:35:in `run_file'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:26:in `block in run'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:25:in `each'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu/runner.rb:25:in `run'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/seed-fu-2.3.6/lib/seed-fu.rb:29:in `seed'
/vagrant/lib/tasks/db.rake:20:in `block in <main>'
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
/home/vagrant/.rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `eval'
/home/vagrant/.rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

```

I also created admin user with `bundle exec rake admin:create`.

---

<div class="post-metadata">

### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld)
#### Post date: [Août 17, 2017, 7:21 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/4 "2017-08-17T07:21:31Z")

</div>

Hmm it looks like running it in Vagrant is causing some sort of error. I personally don’t use Vagrant myself so I’ll let someone who does chip in.

---

<div class="post-metadata">

### Author: ![almone](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/almone/32/120777_2.png) [@almone](https://meta.discourse.org/u/almone)
#### Post date: [Août 17, 2017, 7:29 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/5 "2017-08-17T07:29:07Z")

</div>

By the way I tried to make clean [Docker based install](https://github.com/discourse/discourse/blob/master/docs/INSTALL.md) on DO – everything is working like a charm there.

---

<div class="post-metadata">

### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld)
#### Post date: [Août 17, 2017, 7:30 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/6 "2017-08-17T07:30:50Z")

</div>

I believe the vagrant guide is meant for development purposes so I wouldn’t recommend running it in production.

---

<div class="post-metadata">

### Author: ![almone](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/almone/32/120777_2.png) [@almone](https://meta.discourse.org/u/almone)
#### Post date: [Août 17, 2017, 7:39 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/7 "2017-08-17T07:39:29Z")

</div>

I’m not going to use it on production. I’m trying to install in on my local dev server. The reason is what I want to make some changes to default template. For example I want best authors (most liked) to be shown on front page. Right now I have no idea how to do this. I think it would be easier to understand how template works on dev environment. But that’s another story…

---

<div class="post-metadata">

### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld)
#### Post date: [Août 17, 2017, 7:47 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/8 "2017-08-17T07:47:16Z")

</div>

Ic. I got confused when mention the Docker based install which I took as you’re trying to get your production Discourse up and running. I’m personally don’t use Vagrant in development so you’ll have to wait for someone else that does.

---

<div class="post-metadata">

### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld)
#### Post date: [Août 17, 2017, 10:29 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/9 "2017-08-17T10:29:18Z")

</div>

It turns out it wasn’t a problem with Vagrant. I was running into the same error in development as well. Fixed in

[https://github.com/discourse/discourse/commit/0e656ff213d11b0d416927763c284fa98f91aa5b](https://github.com/discourse/discourse/commit/0e656ff213d11b0d416927763c284fa98f91aa5b)

though I’m not sure why this wasn’t causing problems previously.

---

<div class="post-metadata">

### Author: ![almone](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/almone/32/120777_2.png) [@almone](https://meta.discourse.org/u/almone)
#### Post date: [Août 17, 2017, 6:45 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/10 "2017-08-17T18:45:08Z")

</div>

Oh, thank you for your support! That works for me as well 👍

---

<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: [Juin 8, 2024, 12:44 UTC](https://meta.discourse.org/t/cant-sign-in-as-admin-user-undefined-method-username-for-nil-nilclass/68169/11 "2024-06-08T12:44:23Z")

</div>

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