Eloquent pre-loading relationships against DB write connection

问题

I have a Laravel 5.2 project with a DB master-slave setup. When running something like Model::onWriteConnection()->with('relationship')->find($id), only the find() query is run against the write connection; the with() query is still run against a slave.

This particular query must be run against the master connection, since the relevant data may not have been replicated to the slaves yet.

Is there a way to force all parts of the eloquent query to run against the write connection?

回答1:

try this:

Model::onWriteConnection()->with(['relationship'=>function($query){
   $query->useWritePdo();
}])->find($id)

look at Constraining Eager Loads

来源：https://stackoverflow.com/questions/39347718/eloquent-pre-loading-relationships-against-db-write-connection