Question

我有以下对象。

public class Anonymization {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    @OneToMany(mappedBy = "anonymization")
    private List<Host> hosts;
    @OneToMany(mappedBy = "anonymization")
    private List<Item> items;

对象Host和Item有几个布尔字段。我想显示一个表单，其中所有Host和Item对象都显示为复选框，以便可以编辑布尔字段。我写了一个控制器来显示表格

@RequestMapping("monitoringsystem/{mId}/anonymization")
    public String editAnonymisatzion(Model model, @PathVariable Long mId){
        model.addAttribute("mId", mId);
        model.addAttribute("anonymization", monitoringSystemRepository.findOne(mId).getAnonymization());
        return "monitoringsystem/anonymizationForm";
    }

anonymizationForm应显示for-each-loop

中的复选框

<!-- more code --->
<form class="form-horizontal" th:modelAttribute="anonymization" th:object="${anonymization}" th:action="@{'monitoringsystem/' + ${mId} + '/anonymisatzion/save'}" method="post">
            <input type="hidden" th:field="*{id}"/>
            <fieldset>
                <legend>Set Anonymization</legend>
                <div class="panel panel-default">
                    <div class="panel-heading">Anonymizie Hostnames</div>
                    <div class="panel-body">
                        <div class="form-group" th:each="host : ${anonymization.hosts}">
                            <label class="col-md-4 control-label" for="checkboxes" th:text="${host.name}"></label>
                            <div class="col-md-4">
                                <div class="checkbox">
                                    <label for="checkboxes-0">
                                        <input th:field="${host.anonymizeName}" type="checkbox" /> 
                                        anonymizie
                                    </label>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="panel panel-default">
                    <div class="panel-heading">Anonymizie Items</div>
                    <div class="panel-body">
                        <div class="form-group" th:each="item : ${anonymization.items}">
                            <label class="col-md-4 control-label" for="checkboxes" th:text="${item.name}"></label>
                            <div class="col-md-4">
                                <div class="checkbox">
                                    <label for="checkboxes-0">
                                        <input th:field="${item.anonymizeName}" type="checkbox" /> 
                                        anonymizie name
                                    </label>
                                </div>
                                <div class="checkbox">
                                    <label for="checkboxes-0">
                                        <input th:field="${item.anonymizeData}" type="checkbox" /> 
                                        anonymizie data
                                    </label>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
<!-- more code --->

不幸的是，当我调用View时，我收到以下错误

Caused by: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'host' available as request attribute

我检查我的数据库所有关系都已正确设置。 List<Host>应包含1个和List<Item> 2个条目。

我找不到我的错误。

更新1：

我对传递给表单的匿名化对象进行了调查。它已经完成了。这意味着所有的听力都存在。所以我猜错误与我的观点有关 - 我如何调用该对象。

Answer 1

我找到了myselfe的解决方案。所有的拳头我改变了在表单中调用列表对象的方式

<form class="form-horizontal" th:modelAttribute="anonymization" th:object="${anonymization}" th:action="@{'monitoringsystem/' + ${mId} + '/anonymisatzion/save'}" method="post">
        <input type="hidden" th:field="*{id}"/>
        <fieldset>
            <legend>Set Anonymization</legend>
            <div class="panel panel-default">
                <div class="panel-heading">Anonymizie Hostnames</div>
                <div class="panel-body">
                    <div class="form-group" th:each="host, statHost : *{hosts}">
                        <label class="col-md-4 control-label" for="checkboxes" th:text="*{hosts[__${statHost.index}__].name}"></label>
                        <div class="col-md-4">
                            <div class="checkbox">
                                <label for="checkboxes-0">
                                    <input th:field="*{hosts[__${statHost.index}__].anonymizeName}" type="checkbox" /> 
                                    anonymizie
                                </label>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="panel panel-default">
                <div class="panel-heading">Anonymizie Items</div>
                <div class="panel-body">
                    <div class="form-group" th:each="item, statItem : *{items}">
                        <label class="col-md-4 control-label" for="checkboxes" th:text="*{items[__${statItem.index}__].name}"></label>
                        <div class="col-md-4">
                            <div class="checkbox">
                                <label for="checkboxes-0">
                                    <input th:field="*{items[__${statItem.index}__].anonymizeName}" type="checkbox" /> 
                                    anonymizie name
                                </label>
                            </div>
                            <div class="checkbox">
                                <label for="checkboxes-0">
                                    <input th:field="*{items[__${statItem.index}__].anonymizeData}" type="checkbox" /> 
                                    anonymizie data
                                </label>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="panel panel-default">
                <div class="panel-body">
                    <div class="form-group">
                        <label class="col-md-4 control-label" for="singlebutton"></label>
                        <div class="col-md-4">
                            <a th:href="@{/monitoringsystem}" class="btn btn-default btn-small">Cancel</a> <button id="singlebutton" name="singlebutton" class="btn btn-primary btn-small">Submit</button>
                        </div>
                    </div>
                </div>
            </div>
        </fieldset>
    </form>

此外，getter和setter的命名似乎存在问题。我的就像：

setBoolean(boolean b){
    this.b = b;
}

isBoolean(){
    return b;
}

Spring或thymeleaf（我不知道哪个组件负责）似乎需要以get开头的getter。改变它之后它现在正在工作。

setBoolean(boolean b){
    this.b = b;
}

getBoolean(){
    return b;
}

将列表条目显示为复选框 - BindingResult和plain都不可用

1 个答案: