将我的原始 sql 转换为雄辩的代码时出错

Question

各位开发者您好， 我正在尝试将我的查询转换为雄辩的代码，但是当我在其他命令中使用“CASE”命令时，我决定将选择部分插入 DB::raw 但现在我遇到了一些语法错误或访问冲突：1055，这是我的sql：

SELECT pa.id_budget_total,pa.name,CASE WHEN co.budget IS null THEN pa.amount ELSE pa.amount - SUM(co.budget) END AS left 
    FROM budget_total pa LEFT JOIN convening co ON pa.id_budget_total = co.budget_total 
    where pa.status = 1 GROUP BY pa.name

我有点将其转换为 eloquent，但是当我添加 co.budget 时，它告诉我后面的错误代码 co.budget 不是 group by，是的，如果我在 groupBy 中添加它，它不会显示任何错误，但那d 改变整个结果。这是雄辩的代码：

budget_total::select(DB::raw("pa.id_budget_total,pa.name, CASE WHEN co.budget IS null THEN pa.amount ELSE pa.amount - SUM(co.budget) END AS restante"))
->from("budget_total as pa")->leftJoin("convocatoria as co","pa.id_budget_total","=","co.id_budget_total")->where("pa.status", 1)
->groupBy("pa.id_budget_total","pa.name","pa.amount")->get();

Answer 1

一种选择是始终使用ELSE 条件，但随后COALESCE 和NULL 之和为零。

budget_total::select(DB::raw("pa.id_budget_total, pa.name,
    pa.amount - COALESCE(SUM(co.budget), 0) AS restante"))
    ->from("budget_total as pa")
    ->leftJoin("convocatoria as co", "pa.id_budget_total", "=", "co.id_budget_total")
    ->where("pa.status", 1)
    ->groupBy("pa.id_budget_total", "pa.name", "pa.amount")
    ->get();