我使用带百里香叶3的春季靴子
我尝试显示一个bean
在我的控制器中我有
public String getNewCarsTemplate(Model model) {
model.addAttribute("cars", new Cars());
}
我有汽车
@OneToOne
private Cities cities; // field id and name
@OneToMany(mappedBy = "car")
private List<Locations> locations = new ArrayList<>();
我所在的位置
private Integer id;
private String name;
@ManyToOne
private Suppliers supplier;
在我的百里香片中
<form id="carsForm" action="#" th:action="@{/template/new/cars}" th:object="${cars}" th:method="post">
...
<input type="hidden" th:field="*{cities.id}" >
<input id="carsCities" class="form-control js-typeahead" type="search" placeholder="Type partial value" th:field="*{cities.name}" autocomplete="off" >
...
<table id="locationsTable" class="table table-striped table-hover responsive">
<thead>
<tr>
<th th:text="#{name}">Name</th>
<th></th>
</tr>
</thead>
<tbody>
<tr th:each="car, stat : ${cars}">
<td>
<input type="hidden" th:id="${'locationId-'+stat.index}" th:field="*{car.locations[__${stat.index}__].id}" />
<input type="text" class="form-control" th:id="${'locationName-'+stat.index}" th:placeholder="#{name.placeholder}" placeholder="Name" th:field="*{car.locations[__${stat.index}__].name}" />
</td>
<td class="align-middle"> <i class="fas fa-trash-alt"></i></td>
</tr>
</tbody>
</table>
</form>
当我尝试显示这个片段时,我得到了
org.attoparser.ParseException:评估SpringEL的异常 表达:&#34; cities.id&#34;引起: org.springframework.expression.spel.SpelEvaluationException:EL1008E: 财产或字段&#39; id&#39;在类型的对象上找不到 &#39;的java.util.ArrayList&#39; - 可能不公开或无效?
答案 0 :(得分:0)
你能尝试替代
吗?<input type="hidden" th:field="*{cities.id}" >
与
<input type="hidden" th:field="*{cities?.id}" >
让我知道这是否适合你。 &#39;?&#39;运算符将解决新的Cars()对象中的城市为空的问题