Thymeleaf URL Syntax is is confusing

Question

So I'm trying to generate (dynamic) links through Thymeleaf.

Now the first url I want to link to is /resource/id so I have the following:

<a th:href="|/resource/${resource.id}|" href="#" class="btn btn-default">Edit...</a>

Which works great, and does exactly what you would expect.

So the next url I want to link to is /resource/id/child/id so I try the following:

<a th:href="|/resource/${resource.id}/child/${child.id}|" href="#" class="btn btn-default">Edit...</a>

Which I thought would give me what I wanted. Instead I get:

/resource/3/child%7D?id=4

Which is weird and confusing. I'm not really sure why this happens or how to get what I want which is:

/resource/3/child/4

Any help greatly appreciated. I'm using spring-boot/spring-mvc if it makes any difference.

Update: Okay, so after re-reading (and comprehending) the documentation, it turns out the the more correct syntax is:

<a th:href="@{/resource/{rid}/child/{cid}(rid=${resource.id} cid=${child.id})}" href="#" class="btn btn-default">Edit...</a>

Now I get the url:

/resource/3/child?id=4

Which while very close is still slightly wrong and confusing.

Does Thymeleaf not support more than one path variable?

lgd · Accepted Answer · 2015-03-02 07:38:35Z

2

I think a comma is missing. Try like this :

th:href="@{/resource/{rid}/child/{cid}(rid=${resource.id},cid=${child.id})}"

Each key/value should be separate with a comma in order to correctly build an URL with multiple path variables.

answered Mar 2, 2015 at 7:38

lgd

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gregdim · Accepted Answer · 2015-03-01 20:37:19Z

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When working with urls you should better use the url syntax @{...} instead of literal substitution. For example in your case:

    <a th:href="@{/resource/{resource.id}/child/{child.id}}" 
          href="#" class="btn btn-default">Edit...</a>

(note the absence of the dollar sign in rest resource placeholders)

answered Mar 1, 2015 at 20:37

gregdim

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2 Comments

Mikkel Løkke Over a year ago

I tried this originally, but that just gives me a URL that says /resource/%7Bresource,id%7D, and the second url is /resource/%7Bresource.id%7D/child?id=4, which is even more wrong. :(

gregdim Over a year ago

see answer by heRoy. I forgot about the parameters mapping

niels · Accepted Answer · 2015-03-02 18:39:41Z

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Have you check the value of child.id? I used it very often like @{|/resource/${resource.id}/child/${child.id}|}. You can evaluate the syntax wit <a th:with="child_id='4'" th:href="@{|/resource/${resource.id}/child/${child_id}|}" and put a <span th:text="${child.id}"></span> to your html to see what value child.id has.

answered Mar 2, 2015 at 18:39

niels

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