How to use laravel DB::setDatabaseName? - database

Question

I use DB::setDatabaseName(<database name>) to reset the databasename, then I use DB::table(<table name>)->get() to retrieve data. However laravel does not change to new database.
This is my error message:
Illuminate/Database/QueryException with message 'SQLSTATE[42P01]:
Undefined table: 7 ERROR: relation "t" does not exist LINE 1: select
* from "t" ^ (SQL: select * from "t")'
The table t is in another database. I think when I use DB::setDatabaseName(<database name>) it would work.
Thank you for your help!

Answer 1

I don't know your database of detail information, but this help you to check database have changed.
// current database is 'db_1'
echo DB::getDatabaseName(); // return db_1
// Set database to 'db_2'
DB::setDatabaseName('db_2');
// If success, should return 'db_2' now.
echo DB::getDatabaseName();
// Check database tables.
DB::select('show tables');

Answer 2

I was facing a similar issue.
But changing the database solely might not always work.
You could use config->set() like so
config()->set('database.connections.mysql', $database_name);
But in my case I had to reconnect the database to change it dynamically.
So maybe this one works for the OP.
\DB::disconnect();
config()->set('database.pgsql.database', $database_name); // psgl = Postgress
\DB::reconnect();
You'll find more info here Laravel 6 config()->get('database.connections.mysql') not matching DB:connection()
Hope it helps