1

business/model/dao/print_bill.go

@@ -1,7 +1,21 @@
 package dao
 
+import (
+	"errors"
+	"git.rosy.net.cn/jx-callback/business/model"
+)
+
 // DeductionPrintBalance 扣除打印机账号余额
 func DeductionPrintBalance(db *DaoDB, printNo string) error {
-	_, err := ExecuteSQL(db, `UPDATE print_bill SET print_balance = print_balance -1 WHERE print_no = ?`, []interface{}{printNo}...)
+	var data *model.PrintBill
+	if err := GetRow(db, &data, `SELECT * FROM print_bill WHERE print_no = ?`, []interface{}{printNo}...); err != nil {
+		return err
+	}
+
+	if data == nil {
+		return errors.New("数据异常")
+	}
+
+	_, err := UpdateEntity(db, data, "print_balance")
 	return err
 }