[英]Laravel groupBy Database query Builder not working
I have this problem in a query using laravel groupBy, it simply return a groupBy error. 我在使用laravel groupBy的查询中遇到此问题,它只是返回了groupBy错误。 I have read the documentation about this but can't really figure it out.
我已经阅读了有关此文档,但无法真正解决。 I also read the same problem pointing that it is because of postgreSQL that I need to include all the columns in grouBy clause.
我还读了同样的问题,指出是由于postgreSQL,我需要在grouBy子句中包括所有列。 I tried it but still it doesn't return the distinct values.
我试过了,但仍然没有返回不同的值。 Please help me with this.
请帮我解决一下这个。 Below is my code.
下面是我的代码。 Thanks a lot.
非常感谢。
Controller function 控制器功能
public function index(){
$purchases = Purchase::groupBy('purchase_order_id')->get();
return view('purchases/purchases_crud', ['allPurchases' => $purchases]);
}
Error 错误
QueryException in Connection.php line 680:
SQLSTATE[42803]: Grouping error: 7 ERROR: column "purchases.id" must appear
in the GROUP BY clause or be used in an aggregate function
LINE 1: select * from "purchases" group by "purchase_order_id"
^ (SQL: select * from "purchases" group by "purchase_order_id")
There you have it add group by "purchases.id" or restrict the select to only the operates that are needed. 在那里,您可以按“ purchases.id”添加组,或者将选择限制为仅需要的操作。
->select("purchase_order_id","purchases.id")
->groupBy("purchases.id") // add if possible
Agreggates for your case should mean something like ->select("sum(po_total)")
针对您的案例的Agreggates应该表示类似
->select("sum(po_total)")
If we group by id, we get all results as id is unique, my mistake. 如果我们按ID分组,我们会得到所有结果,因为ID是唯一的,这是我的错。 You want something like this
你想要这样的东西
DB::table("purchases")->select("purchase_order_id", DB:raw("sum(po_total)"))->groupBy("purchase_order_id")->get();
Rule of thumb is you either select a field with Sum() or have it on the group by 经验法则是您要么使用Sum()选择一个字段,要么将其放在分组依据
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