Database [] not configured Laravel 5 - laravel

Question

I create new db in phpmyadmin and new tables.
Then i do
public function next(Request $request){
$langs = DB::connection('mydb')->select('select * from lang');
}
and get
Database [compgen] not configured.
in my .env
DB_HOST=localhost
DB_DATABASE=test
DB_USERNAME=root
DB_PASSWORD=123
in my config/database.php
'mysql' => [
'driver' => 'mysql',
'host' => env('DB_HOST', 'localhost'),
'database' => env('DB_DATABASE', 'test'),
'username' => env('DB_USERNAME', 'root'),
'password' => env('DB_PASSWORD', '123'),
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => 'test_',
'strict' => false,
],

Answer 1

In my case I used 2 db connections and the second added was not cached, the command call:
php artisan config:cache
did the trick.
To see what's going on it was sufficient to output the $connections variable in DatabaseManager->configure method.

Answer 2

You're using single connection, so you don't need to specify it:
$langs = DB::table('lang')->get();
You should use connection() method only when you're working with multiple DB connections.

Answer 3

For me the connection worked in development but not in the production environment, so after a lot of searching, I had to rebuild the configuration cache and It has worked. I ran the following command in the laravel root directory:
php artisan config:cache

Answer 4

Anyone stumbling upon this - if you are using Laravel 5.4 or newer, you can setup a new database connection in config/database.php
'mysql_test' => [
'driver' => 'mysql',
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE_TEST', 'forge'),
'username' => env('DB_USERNAME_TEST', 'forge'),
'password' => env('DB_PASSWORD_TEST', ''),
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'strict' => false,
'modes' => [
'ONLY_FULL_GROUP_BY',
'STRICT_TRANS_TABLES',
'NO_ZERO_IN_DATE',
'NO_ZERO_DATE',
'ERROR_FOR_DIVISION_BY_ZERO',
'NO_AUTO_CREATE_USER',
'NO_ENGINE_SUBSTITUTION',
],
'engine' => null,
],
I created 3 new env variables DB_USERNAME_TEST, DB_PASSWORD_TEST, DB_DATABASE_TEST
Edit .env with something like
DB_DATABASE_TEST=test_db
DB_USERNAME_TEST=local
DB_PASSWORD_TEST=localpassword
Make sure config is refreshed: php artisan config:cache
You should be able to run a database migrate on your new test database, like so:
php artisan migrate:refresh --database=mysql_test

Answer 5

In my case it was a bad database username. I had it set in my config/database.php as well as the .env file and one of them was different than the other. Found this thread when searching, thought this might help someone.

Answer 6

I struggled with this error for a few hours and found out solution that works for me. If you can not delete cache with php artisan config:cache because it throws error after you run it:
[InvalidArgumentException]
Database [] not configured
And if you are sure that your connections parameters are good then try manually delete bootstrap cache config files which are placed in app/bootstrap/cache folder.
Hope it helps someone.

Answer 7

make sure the parameters
DB_CONNECTION=mysql
DB_HOST=localhost
DB_PORT=3306
DB_DATABASE=dbname
DB_USERNAME=dbuser
DB_PASSWORD="password"
and then issue,
php artisan optimize:clear

Answer 8

I had the same issue but when i added
'default' => env('DB_CONNECTION', 'mysql'),
to database.php.It seems to have solved the problem

Answer 9

if this error shows when you use the validation so it is simple :) just check all the validation rules and messages are written >
correctly
for me i faced this error and i solve it by replace only point by comma in the validation rules.