Thymeleaf aggregation not working - thymeleaf

Question

We've got the following code:
<div th:each="client : ${clients}">
<div th:each="purchase : ${client.purchases}">
<div th:each="product : ${purchase.products}">
<span th:text="${product.price}"></span>
<!-- <span id="2" th:text="${#aggregates.sum(products.{price})}"> </span> -->
<!-- <span id="2" th:text="${#aggregates.sum(products.![price])}"> </span> -->
</div>
</div>
</div>
The output is:
5.25
4.20
If I uncomment the first comment, I get error
Exception evaluating SpringEL expression: "#aggregates.sum(products.{price})" (clients/clients:84)
If I uncomment only the second comment, I get error:
Exception evaluating SpringEL expression: "#aggregates.sum(products.![price])" (clients/clients:85)
I tried to use http://demo-dspace-cris.cineca.it/bitstream/123456789/26/1/usingthymeleaf.pdf
I am using thymeleaf 2.1.4
IT WORKS !
I should use:
<span id="2" th:text="${#aggregates.sum(purchase.products.![price])}"> </span>

Answer 1

I figured it myself after posting here !
<div th:each="client : ${clients}">
<div th:each="purchase : ${client.purchases}">
<span id="2"
th:text="${#aggregates.sum(purchase.products.![price])}"> </span>
<div th:each="product : ${purchase.products}">
<span th:text="${product.price}"></span>
</div>
</div>
</div>
output:
9.45
5.25
4.20
site that helped me a lot: http://forum.thymeleaf.org/aggregates-with-Spring-td3767446.html