controller

flutter - ScrollController attached to multiple scroll views

匆匆过客 提交于 2020-08-10 22:10:27
问题 I am newbie flutter. I developing ann app and i got below error but i dont know why.. I do not have any controller. Is it about CarouselSlider ? because, i look at error point, that shows "child: CarouselSlider" What can i do ? Please help me. ════════ Exception caught by widgets library ═══════════════════════════════════ ScrollController attached to multiple scroll views. 'package:flutter/src/widgets/scroll_controller.dart': Failed assertion: line 111 pos 12: '_positions.length == 1' The

Validating if request body in HTTP POST request is null in Spring Boot controller

天涯浪子 提交于 2020-08-10 20:15:07
问题 I am replacing manual validation of input to a POST request in a Spring Boot REST-controller. JSR-303 Spring Bean Validation is used for validating the instance variables in the request body and this is working as expected. What is the recommended method to validate that the object in the request body is not null? I have tried: annotating the entire object such as this: @NotNull @Valid @RequestBody Foo foo annotating the entire class with @NotNull I am replacing: @PostMapping... public

@Transactional on controller method not working

余生长醉 提交于 2020-08-09 06:57:44
问题 In my Spring MVC application, I have a method in a controller that needs to save a bunch of objects (built from an uploaded file) to a database. Let us leave aside for the moment the whole question about whether transactions should be done in the controller or service layer -- the point is that it should technically be feasible to do it in the controller, but I am finding problems. If you look at the code below, what I am expecting is that if any of the three calls to saveContact fails with

@Transactional on controller method not working

淺唱寂寞╮ 提交于 2020-08-09 06:55:59
问题 In my Spring MVC application, I have a method in a controller that needs to save a bunch of objects (built from an uploaded file) to a database. Let us leave aside for the moment the whole question about whether transactions should be done in the controller or service layer -- the point is that it should technically be feasible to do it in the controller, but I am finding problems. If you look at the code below, what I am expecting is that if any of the three calls to saveContact fails with