CODEWITHSUNDEEP
spring-mvcthymeleaf
Leonardo Andrade
Leonardo Andrade

Reputation: 2618

How to compare two variables of the model with Thymeleaf Standard Expression Syntax?

I'm trying to set the selected option's attribute with thymeleaf + springMVC as shown below:

(item.codItem and defaultCodItem are Long)

<select id="selItems">
<th:block th:each="item : ${myItems}">
    <option value="564" th:value="${item.codItem}" th:selected="(${item.codItem} eq ${defaultCodItem})? 'selected' : '' "
        th:text="${item.codItem} + ' || ' + ${defaultCodItem}">  564 || ?
    </option>
</th:block>
</select>

But the result is...

<select id="selItems">
    <option selected="selected" value="455">11/2014 - 455 || 450</option>
    <option selected="selected" value="450">450 || 450</option>
    <option selected="selected" value="452">452 || 450</option>
    <option selected="selected" value="457">457 || 450</option>
    <option selected="selected" value="453">453 || 450</option>
    <option selected="selected" value="454">454 || 450</option>
    <option selected="selected" value="451">451 || 450</option>
</select>

When I expected this:

<select id="selItems">
    <option selected="" value="455">11/2014 - 455 || 450</option>
    <option selected="selected" value="450">450 || 450</option>
    <option selected="" value="452">452 || 450</option>
    <option selected="" value="457">457 || 450</option>
    <option selected="" value="453">453 || 450</option>
    <option selected="" value="454">454 || 450</option>
    <option selected="" value="451">451 || 450</option>
</select>

So, how should I compare item.codItem with defaultCodItem in the template to set selected attribute correctly?

Upvotes: 2

Views: 8075

Answers (1)

gregdim
gregdim

Reputation: 2071

According to Thymeleaf documentation :

The Standard Dialect includes attributes that allow you to set these attributes by evaluating a condition, so that if evaluated to true, the attribute will be set to its fixed value, and if evaluated to false, the attribute will not be set

selected is one of them . I think you should write the condition simply as :

th:selected="${item.codItem} eq ${defaultCodItem}"

I guess your current line does not work as expected because non null values are evaluated to true (such as your empty string)

Upvotes: 8

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