Thymeleaf + Spring: get rid of the default element id - spring

Question

Is there any way to suppress auto-generating ID attribute for elements while using th:field in Thymeleaf (2.1.4.RELEASE)? For example, given code:
<input type="text" th:field="*{year}" />
will produce the following HTML:
<input type="text" id="year" name="year" value="" />
What I want to achieve is (no id attribute):
<input type="text" name="year" value="" />
In JSP it was as easy as setting empty id:
<form:input path="year" id="" />
but Thymeleaf just replaces this empty attribute with the default-generated one.

Answer 1

Ok, I have looked inside the source code of Thymeleaf (2.1.4.RELEASE) and the method responsible for setting element id in Spring dialect is org.thymeleaf.spring4.processor.attr.SpringInputGeneralFieldAttrProcessor.doProcess(...) (source on Github) that calls org.thymeleaf.spring4.processor.attr.AbstractSpringFieldAttrProcessor.computeId(...) (source on Github). If you look at computeId(...), you will see that there is no simple way to set empty id.
So we need to do it in not a simple way :) Here it is:
I created a custom dialect and defined a custom attribute noid. The markup looks like this:
<input type="text" th:field="*{year}" thex:noid="true" />
There is a great tutorial explaining how to create and use custom dialects in Thymeleaf and below is the most important part: attribute processor responsible for removing id attribute from given element.
Important things to note:
high precedence value (9999) guarantees that this processor will be executed as the last one (so no other processors will modify id after this one is executed)
modification type is set to substitution so we are completely replacing value of id element
removeAttributeIfEmpty(...) returns true, rather self-explanatory, remove attribute if empty
getModifiedAttributeValues(...) sets id to empty value and because above-mentioned method returns true, id attribute is removed
Code:
public class NoIdAttrProcessor extends AbstractAttributeModifierAttrProcessor {
public NoIdAttrProcessor() {
super("noid");
}
#Override
public int getPrecedence() {
return 9999;
}
#Override
protected ModificationType getModificationType(Arguments arguments, Element element, String attributeName, String newAttributeName) {
return ModificationType.SUBSTITUTION;
}
#Override
protected boolean removeAttributeIfEmpty(Arguments arguments, Element element, String attributeName, String newAttributeName) {
return true;
}
#Override
protected boolean recomputeProcessorsAfterExecution(Arguments arguments, Element element, String attributeName) {
return false;
}
#Override
protected Map<String, String> getModifiedAttributeValues(Arguments arguments, Element element, String attributeName) {
Map<String, String> values = new HashMap<>(1);
values.put("id", "");
return values;
}
}

Answer 2

If you dont want to use this in id of you input field just assign the value to only the th:name field,
<input type="text" th:name="*{year}" />
will give you output like,
<input type="text" name="2015" />
Or You can use a string at the end to make the id generate different from the name attribute like this
<input type="text" th:name="*{year}" th:id="*{year} + '-year' " />
will give you the output,
<input type="text" name="2015" id="2015-year"/>