清空打印队列

business/model/dao/dao_print.go

@@ -25,3 +25,20 @@ func GetPrinters(db *DaoDB, appID int, printNo string) (printers []*model.Printe
 	err = GetRows(db, &printers, sql, sqlParams)
 	return printers, err
 }
+
+func GetPrintMsgs(db *DaoDB, printNo string) (printMsgs []*model.PrintMsg, err error) {
+	sql := `
+		SELECT *
+		  FROM print_msg
+         WHERE 1 = 1 AND deleted_at = ? AND status = ?
+	`
+	sqlParams := []interface{}{
+		utils.DefaultTimeValue, model.PrinterStatusNormal,
+	}
+	if printNo != "" {
+		sql += " AND print_no = ?"
+		sqlParams = append(sqlParams, printNo)
+	}
+	err = GetRows(db, &printMsgs, sql, sqlParams)
+	return printMsgs, err
+}