Multiple databases in Laravel PHP [duplicate] - php

Question

This question already has answers here:
How to use multiple databases in Laravel
(7 answers)
Closed 5 years ago.
We are building a multi-tenant application. Through the admin interface, we will add new tenant as and when required. This application needs to work with 1+n database.
1 Main DB with about 5 tables.
n DBs for each tenant that we create. The tenant specific database may reside on the separate db server altogether.
Question:
What is the best way to achieve this ?
Where do we store the the db connection information for each tenant ?
Sometime, we may have to fire join queries on tables in tenant and main db.
How would this work?
Thanks in advance for reading and any possible solution please.

Answer 1

Google is your friend, so is the documentation:
https://laravel.com/docs/5.4/database#using-multiple-database-connections
config/database.php
And add a new connection for each database-connection you want to use.
To switch connections:
$users = DB::connection('foo')->select(...);

Answer 2

We can set the DB connection in config/database.php in connections part:
'connections' => [
//Our primary DB
'mysql' => [
'driver' => 'mysql',
'host' => env('DB_HOST', 'localhost'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'forge'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
'strict' => false,
'engine' => null,
],
//Secondary DB
'mysql2' => [
'driver' => 'mysql',
'host' => env('DB_HOST', 'localhost'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB2_DATABASE', 'secondary'),
'username' => env('DB2_USERNAME', 'forge'),
'password' => env('DB2_PASSWORD', ''),
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
'strict' => false,
'engine' => null,
],
],
And for Model we can add
class User2 extends Model
{
protected $connection = 'mysql2';
}
And in migration we can use connection method.
Schema::connection('mysql2')->create('table')
And if you use Eloquent ORM we can use setConnection('mysql2') on it.
$user = new User2;
$user->setConnection('mysql2');
This answer based on this question

Answer 3

In my case a wont use multi-tenant
store child db configurations in main database
set child db params in middleware
use $connection = 'child' in needed models
join is not possible, because may be different servers, but huge part of relations is work propertly (not whereExists, withCount.. etc)
Hope it`s help