I use spring boot with thymeleaf 3
I try to display a bean
In my controller I have
public String getNewCarsTemplate(Model model) {
model.addAttribute("cars", new Cars());
}
In cars I have
@OneToOne
private Cities cities; // field id and name
@OneToMany(mappedBy = "car")
private List<Locations> locations = new ArrayList<>();
In location I have
private Integer id;
private String name;
@ManyToOne
private Suppliers supplier;
In my thymeleaf fragment
<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>
When I try to display this fragment I get
org.attoparser.ParseException: Exception evaluating SpringEL expression: "cities.id" Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'id' cannot be found on object of type 'java.util.ArrayList' - maybe not public or not valid?
