I have setup multiple database connections

"wc" => [
            "driver" => "mysql",
            "url" => env("DATABASE_URL"),
            "host" => env("DB_HOST", "127.0.0.1"),
            "port" => env("DB_PORT", "3306"),
            "database" => env("DB_DATABASE", "forge"),
            "username" => env("DB_USERNAME", "forge"),
            "password" => env("DB_PASSWORD", ""),
            "unix_socket" => env("DB_SOCKET", ""),
            "charset" => "utf8mb4",
            "collation" => "utf8mb4_unicode_ci",
            "prefix" => "",
            "prefix_indexes" => true,
            "strict" => true,
            "engine" => null,
            "options" => extension_loaded("pdo_mysql")
                ? array_filter([
                    PDO::MYSQL_ATTR_SSL_CA => env("MYSQL_ATTR_SSL_CA"),
                ])
                : [],
        ],

        "ys" => [
            "driver" => "mysql",
            "url" => env("DATABASE_URL"),
            "host" => env("DB_HOST", "127.0.0.1"),
            "port" => env("DB_PORT", "3306"),
            "database" => env("DB_DATABASE", "forge"),
            "username" => env("DB_USERNAME", "forge"),
            "password" => env("DB_PASSWORD", ""),
            "unix_socket" => env("DB_SOCKET", ""),
            "charset" => "utf8mb4",
            "collation" => "utf8mb4_unicode_ci",
            "prefix" => "",
            "prefix_indexes" => true,
            "strict" => true,
            "engine" => null,
            "options" => extension_loaded("pdo_mysql")
                ? array_filter([
                    PDO::MYSQL_ATTR_SSL_CA => env("MYSQL_ATTR_SSL_CA"),
                ])
                : [],
        ],


DB_CONNECTION=wc
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=wc
DB_USERNAME=root
DB_PASSWORD=

DB_CONNECTION=ys
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=ys
DB_USERNAME=root
DB_PASSWORD=

and i would like to choose which conenction to use when running a controller

<?php

namespace App\Http\Controllers\adx_world;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;

use DB;
use App\Http\Requests;

class ApiController extends Controller
{

    public function creator(){
       
     $data=array('name'=>time(),"city"=>time());
     DB::connection('ys')->table('test')->insert($data);
     echo "Record inserted successfully.<br/>";
    
    }
}

This throws an error

SQLSTATE[42S02]: Base table or view not found:

What could be the problem?

>Solution :

Your configuration is incorrect. You are using same env variables for both connections, which means that you’re overwriting it in .env file. So you need unique keys in env files which are used in 2 connections.

Change to this your config and env:

"wc" => [
        "driver" => "mysql",
        "url" => env("DATABASE_URL"),
        "host" => env("DB_HOST", "127.0.0.1"),
        "port" => env("DB_PORT", "3306"),
        "database" => env("DB_DATABASE", "forge"),
        "username" => env("DB_USERNAME", "forge"),
        "password" => env("DB_PASSWORD", ""),
        "unix_socket" => env("DB_SOCKET", ""),
        "charset" => "utf8mb4",
        "collation" => "utf8mb4_unicode_ci",
        "prefix" => "",
        "prefix_indexes" => true,
        "strict" => true,
        "engine" => null,
        "options" => extension_loaded("pdo_mysql")
            ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env("MYSQL_ATTR_SSL_CA"),
            ])
            : [],
    ],

    "ys" => [
        "driver" => "mysql",
        "url" => env("YS_DATABASE_URL"),
        "host" => env("YS_DB_HOST", "127.0.0.1"),
        "port" => env("YS_DB_PORT", "3306"),
        "database" => env("YS_DB_DATABASE", "forge"),
        "username" => env("YS_DB_USERNAME", "forge"),
        "password" => env("YS_DB_PASSWORD", ""),
        "unix_socket" => env("DB_SOCKET", ""),
        "charset" => "utf8mb4",
        "collation" => "utf8mb4_unicode_ci",
        "prefix" => "",
        "prefix_indexes" => true,
        "strict" => true,
        "engine" => null,
        "options" => extension_loaded("pdo_mysql")
            ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env("MYSQL_ATTR_SSL_CA"),
            ])
            : [],
    ],


DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=wc
DB_USERNAME=root
DB_PASSWORD=

YS_DB_CONNECTION=mysql
YS_DB_HOST=127.0.0.1
YS_DB_PORT=3306
YS_DB_DATABASE=ys
YS_DB_USERNAME=root
YS_DB_PASSWORD=