Group by Laravel?

问题

I have the following query:

$orders = Order::where(function ($query) use ($request) {

            // Filter by in process delivery
            if ($request->get("status") && $request->get("status") == "2") {
                $query->where('status', "2");
            }

        })->groupBy('created_at')->get();

When I try to execute this query I get an error:

SQLSTATE[42000]: Syntax error or access violation: 1055 'delivery.order.id' isn't in GROUP BY (SQL: select * from `order` group by `created_at`)

What is problem?

回答1:

In your config/database.php file, change mysql configuration array

from 'strict' => true

to 'strict' => false

For more information about this error read this answer.

回答2:

The problem is the final query select * from `order` group by `created_at`. It's trying to select every column, but its grouping only one. Your database is working in only full group mode which means all selected fields have to be in group by clause (or have to be aggregator functions like SUM, COUNT etc.)

I don't know what you really want to get from this query but you can select columns manually like this:

$orders = Order::where(function ($query) use ($request) {
    if ($request->get("status") && $request->get("status") == "2") {
        $query->where('status', "2");
    }
})->groupBy('created_at')
  //select columns like this
  ->select(\DB::raw('COUNT(*)'), 'created_at')
  ->get();

Another option is to disable full group mode but the result will be unexpected and probably that's not what you want.

来源：https://stackoverflow.com/questions/41199800/group-by-laravel