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<a href=".." >Reverse-routing</a>
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<h1 id="reverse-routing-with-ring">Reverse routing with Ring</h1>
<p>Both the <code>router</code> and the <code>match</code> are injected into Ring Request (as <code>::r/router</code> and <code>::r/match</code>) by the <code>reitit.ring/ring-handler</code> and with that, available to middleware and endpoints. To convert a <code>Match</code> into a path, one can use <code>r/match-&gt;path</code>, which optionally takes a map of query-parameters too.</p>
<p>Below is an example how to do reverse routing from a ring handler:</p>
<pre><code class="lang-clj">(<span class="hljs-name">require</span> &apos;[reitit.core <span class="hljs-symbol">:as</span> r])
(<span class="hljs-name">require</span> &apos;[reitit.ring <span class="hljs-symbol">:as</span> ring])
(<span class="hljs-name"><span class="hljs-builtin-name">def</span></span> app
(<span class="hljs-name">ring/ring-handler</span>
(<span class="hljs-name">ring/router</span>
[[<span class="hljs-string">&quot;/users&quot;</span>
{<span class="hljs-symbol">:get</span> (<span class="hljs-name"><span class="hljs-builtin-name">fn</span></span> [{<span class="hljs-symbol">::r/keys</span> [router]}]
{<span class="hljs-symbol">:status</span> <span class="hljs-number">200</span>
<span class="hljs-symbol">:body</span> (<span class="hljs-name"><span class="hljs-builtin-name">for</span></span> [i (<span class="hljs-name"><span class="hljs-builtin-name">range</span></span> <span class="hljs-number">10</span>)]
{<span class="hljs-symbol">:uri</span> (<span class="hljs-name"><span class="hljs-builtin-name">-&gt;</span></span> router
(<span class="hljs-name">r/match-by-name</span> <span class="hljs-symbol">::user</span> {<span class="hljs-symbol">:id</span> i})
<span class="hljs-comment">;; with extra query-params</span>
(<span class="hljs-name">r/match-&gt;path</span> {<span class="hljs-symbol">:iso</span> <span class="hljs-string">&quot;m&#xF6;ly&quot;</span>}))})})}]
[<span class="hljs-string">&quot;/users/:id&quot;</span>
{<span class="hljs-symbol">:name</span> <span class="hljs-symbol">::user</span>
<span class="hljs-symbol">:get</span> (<span class="hljs-name"><span class="hljs-builtin-name">constantly</span></span> {<span class="hljs-symbol">:status</span> <span class="hljs-number">200</span>, <span class="hljs-symbol">:body</span> <span class="hljs-string">&quot;user...&quot;</span>})}]])))
(<span class="hljs-name">app</span> {<span class="hljs-symbol">:request-method</span> <span class="hljs-symbol">:get</span>, <span class="hljs-symbol">:uri</span> <span class="hljs-string">&quot;/users&quot;</span>})
<span class="hljs-comment">; {:status 200,</span>
<span class="hljs-comment">; :body ({:uri &quot;/users/0?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/1?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/2?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/3?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/4?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/5?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/6?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/7?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/8?iso=m%C3%B6ly&quot;}</span>
<span class="hljs-comment">; {:uri &quot;/users/9?iso=m%C3%B6ly&quot;})}</span>
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