Java 用spring、thymeleaf和mongo填充html选择

我正在尝试使用Spring和Thymeleaf使用Mongo集合中的数据填充HTML select。我试着按照这些问题的建议来做：，和，但我没有任何运气

当我在HTML中使用这种语法时

<div class="form-group">
        <label for="commoditiesSelect"> Commodities: </label>
        <select multiple="Commodities" id="commoditiesSelect" class="form-control" th:field="*{commodities}">
           <option th:each="commodity : ${possibleCommoditiesList}"
                   th:text="${possibleCommodities}"
                   th:value="${possibleCommodities}"
           />
        </select>
    </div>

PossibleCommodities存储库类：

package com.sensus.analytics.welcomemat.core.repository;

import com.sensus.analytics.welcomemat.core.model.PossibleCommodities;
import org.springframework.data.mongodb.repository.MongoRepository;
import java.util.List;

public interface PossibleCommoditiesRepository extends MongoRepository<PossibleCommodities, String>  {
public List<PossibleCommodities> findAll();
}

package com.sensus.analytics.welcomemat.core.repository；
导入com.sensus.analytics.welcomemat.core.model.possibleCommondities；
导入org.springframework.data.mongodb.repository.MongoRepository；
导入java.util.List；
公共接口可能Commodities存储库扩展MongoRepository{
公共列表findAll（）；
}

编辑：我也尝试过HTML的这种常见语法：

<div class="form-group">
        <label for="commoditiesSelect"> Commodities: </label>
        <select multiple="Commodities" id="commoditiesSelect" class="form-control" th:field="*{commodities}">
           <option th:each="commodity : ${possibleCommoditiesList}"
                   th:text="${possibleCommodities.commodityName}"
                   th:value="${possibleCommodities.commodityName}"
           />

        </select>
    </div>

商品：

---

但它给了我这个错误：

EL1007E:（位置0）：在null上找不到属性或字段“commodityName”

在这样的行中，您必须知道变量的定义位置：

<option th:each="commodity : ${possibleCommoditiesList}" th:text="${possibleCommodities}" th:value="${possibleCommodities}" />

package com.sensus.analytics.welcomemat.core.repository;

import com.sensus.analytics.welcomemat.core.model.PossibleCommodities;
import org.springframework.data.mongodb.repository.MongoRepository;
import java.util.List;

public interface PossibleCommoditiesRepository extends MongoRepository<PossibleCommodities, String>  {
public List<PossibleCommodities> findAll();
}

<div class="form-group">
        <label for="commoditiesSelect"> Commodities: </label>
        <select multiple="Commodities" id="commoditiesSelect" class="form-control" th:field="*{commodities}">
           <option th:each="commodity : ${possibleCommoditiesList}"
                   th:text="${possibleCommodities.commodityName}"
                   th:value="${possibleCommodities.commodityName}"
           />

        </select>
    </div>

<option th:each="commodity : ${possibleCommoditiesList}" th:text="${possibleCommodities}" th:value="${possibleCommodities}" />

<option th:each="commodity : ${possibleCommoditiesList}" th:text="${commodity.commodityName}" th:value="${commodity.commodityName}" />