Thymeleaf绑定对象列表

Question

这是我从数据库中检索到的对象:

@RequestMapping("/category/edit/{id}")
@org.springframework.transaction.annotation.Transactional
public ModelAndView displayCategoryList(@PathVariable("id")Integer id){
    ModelAndView mav = new ModelAndView("category-form");
    List<CatFeatGroup> catFeatGroupList = catFeatGroupService.findGroupsForCategory(id);
    mav.addObject("catFeatGroupList",catFeatGroupList);
    return  mav;
}

这是我的表格.

<form class="form-horizontal">
    <div th:each="catFeatGroup,status : ${catFeatGroupList}" class="form-group">
        <label>Position</label><input th:field="catFeatGroupList[${status.index}].position"  th:value="${catFeatGroup.position}" />
        <label>Name</label> <input name="catGroupList[${status.index}].name" th:value="${catFeatGroup.name}" />
    </div>
    <button type="submit" class="btn btn-default">Submit</button>
</form>

我需要用来th:field绑定该对象,但是这个错误出现了:

无法解析为表达式:"catFeatGroupList [$ {status.index}].position"

Answer 1

添加像这样的"__"表示法

<form class="form-horizontal">
    <div th:each="catFeatGroup,status : ${catFeatGroupList}" class="form-group">
        <label>Position</label><input th:field="*{catFeatGroupList[__${status.index}__].position}"  th:value="${catFeatGroup.position}" />
        <label>Name</label> <input data-th-name="*{catFeatGroupList[__${status.index}__].name}" th:value="${catFeatGroup.name}" />
    </div>
    <button type="submit" class="btn btn-default">Submit</button>
</form>