修复新增教师、学生功能编号设定错误的问题

shiyu-coder · Dec 26, 2020 · 6f969a4 · 6f969a4
1 parent 0f3695d
commit 6f969a4
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Showing 3 changed files with 4 additions and 4 deletions.
diff --git a/SIM_System.pro.user b/SIM_System.pro.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.11.0, 2020-12-24T01:30:55. -->
+<!-- Written by QtCreator 4.11.0, 2020-12-26T13:07:37. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

diff --git a/addstuwidget.cpp b/addstuwidget.cpp
@@ -47,7 +47,7 @@ void AddStuWidget::on_ConfirmButton_clicked()
 {
     QStringList info;
     QSqlQuery query;
-    query.exec("select COUNT(Sno) from Student");
+    query.exec("select MAX(Sno) from Student");
     if(query.lastError().type()==QSqlError::NoError){
         if(query.next()){
             int snoIndex=query.value(0).toInt()+1;

diff --git a/addteacherwidget.cpp b/addteacherwidget.cpp
@@ -32,10 +32,10 @@ void AddTeacherWidget::on_QuitButton_clicked()
 void AddTeacherWidget::on_ConfirmButton_clicked()
 {
     QSqlQuery TeaQuery;
-    TeaQuery.exec("select COUNT(Tno) from Teacher");
+    TeaQuery.exec("select MAX(Tno) from Teacher");
     if(TeaQuery.lastError().type()==QSqlError::NoError){
         if(TeaQuery.next()){
-            int tnoIndex=TeaQuery.value(0).toInt();
+            int tnoIndex=TeaQuery.value(0).toInt()+1;
             QString tno=QString::number(tnoIndex);
             while(tno.size()<4){
                 tno="0"+tno;