选题编译功能bug修正

工具v3/database_tools_2.py

@@ -1235,9 +1235,13 @@ def generateLaTeXBodyContentfromMariaDB(cursor,id,misc): #根据id,读取的json
         for id_raw in ret_list:
             obj_id = id_raw[0]
             sql = "SELECT obj_content FROM lessonobj WHERE objid = %s;"
-            objval = (obj_id,)
-            cursor.execute(sql,objval)
-            obj_list.append(f"{obj_id}\t{cursor.fetchall()[0][0]}")
+            if not obj_id.upper() == "KNONE":
+                objval = (obj_id,)
+                cursor.execute(sql,objval)
+                obj_list.append(f"{obj_id}\t{cursor.fetchall()[0][0]}")
+            else: 
+                cursor.fetchall()
+                obj_list.append(f"{obj_id}\t暂无目标对应")
         sql = "SELECT tagname FROM tagcorresp WHERE ID = %s;"
         cursor.execute(sql,val)
         tag_list = [t[0] for t in cursor.fetchall()]