尝试在laravel上发布到redis时，在null上调用成员函数publish（）

Question

I am trying to publish stuff to redis but I get this error:

Call to a member function publish() on null.

Not sure whats going on. This is my code. Works well on the local environment but on the server the above error message shows. I have the following code in a controller. The website is hosted on windows azure appservice. I have also installed the predis/predis dependency.

$redis = Redis::connection(6380)->publish('test-channel', json_encode(['foo' => 'bar']));

Am I not connecting to redis or something?

Answer 1

You should pass the connection name to the connection() method

$redis = Redis::connection('my_connection')->publish('test-channel', json_encode(['foo' => 'bar']));

or just skip it, if you intend to use the default connection.

$redis = Redis::publish('test-channel', json_encode(['foo' => 'bar']));

Redis connections should be defined in your config/database.php file.