更正 ViewNum 为空bug

ruoyi-api-patform/src/main/java/com/ruoyi/interfaces/controller/PtServiceController.java

@@ -51,6 +51,9 @@ public class PtServiceController extends BaseController {
     @ApiOperation("添加数据")
     @PostMapping(value = "/save")
     public AjaxResult save(@RequestBody PtService ptService) {
+        if(ptService.getViewNum() == null){  //viewNum不能为空
+            ptService.setViewNum(0);
+        }
         return AjaxResult.success(ptServiceService.save(ptService));
     }