Answers.Body: <p>I don't think that there's a <a href="http://buildwithcraft.com/docs/relations" rel="nofollow">"relation"</a> between categories and their sub-categories.
  But that's what you currently have as a parameter on <code>craft.categories</code>.
  Use the <a href="http://buildwithcraft.com/docs/templating/craft.categories#ancestorOf" rel="nofollow"><code>ancestorOf()</code></a> parameter instead to filter your subcategories:</p>
  
  <pre><code>{% set mainCategory = craft.categories.group('section').level(1).slug(secondSeg).first() %}
  {% set secondLevelCategories = craft.categories.ancestorOf(mainCategory).slug(lastSeg) %}
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-08-14T19:46:07.940Z
Answers.LastActivityDate: 2014-08-14T19:46:07.940Z
Answers.UserDisplayName: carlcs
Body: <p>My entry url structure looks like this:</p>
  
  <pre><code>http://site.com/section/category/subcategory/entry_slug
  </code></pre>
  
  <p>I'm trying to drill down to specific entries by using the url structure and I'm currently having trouble getting the following to work:</p>
  
  <pre><code>{% set secondSeg = craft.request.getSegment(2) %}
  {% set subCategories = craft.categories.group('section').level(2) %}
  
  {% for cat in subCategories.relatedTo(secondSeg).slug(lastSeg) %}
      {{category.title}}
  {% endfor %}
  </code></pre>
  
  <p>Currently nothing is returned. If I remove the .relatedTo(secondSeg) parameter in the cat loop, I'm properly getting all of the entries in child category that match the slug. But, the problem is that there is a possibility of certain entries having the same slug under different child categories. I'm not sure if I'm using the relatedTo parameter properly or not.</p>
  
Tags: <categories><filter>
Title: How do I get entries of a child category, related to a parent category, defined in a URL segment?
ThreadText: # How do I get entries of a child category, related to a parent category, defined in a URL segment?
  
  (Asked by: username_0 on 2014-08-14)
  
  My entry url structure looks like this:
  
  ```
  http://site.com/section/category/subcategory/entry_slug
  
  ```
  
  I'm trying to drill down to specific entries by using the url structure and I'm currently having trouble getting the following to work:
  
  ```
  {% set secondSeg = craft.request.getSegment(2) %}
  {% set subCategories = craft.categories.group('section').level(2) %}
  
  {% for cat in subCategories.relatedTo(secondSeg).slug(lastSeg) %}
      {{category.title}}
  {% endfor %}
  
  ```
  
  Currently nothing is returned. If I remove the .relatedTo(secondSeg) parameter in the cat loop, I'm properly getting all of the entries in child category that match the slug. But, the problem is that there is a possibility of certain entries having the same slug under different child categories. I'm not sure if I'm using the relatedTo parameter properly or not.
  
  **Tags:** categories, filter
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2014-08-14. Score: 4 | Accepted answer
  
  I don't think that there's a ["relation"](http://buildwithcraft.com/docs/relations) between categories and their sub-categories.
  But that's what you currently have as a parameter on `craft.categories`.
  Use the [`ancestorOf()`](http://buildwithcraft.com/docs/templating/craft.categories#ancestorOf) parameter instead to filter your subcategories:
  
  ```
  {% set mainCategory = craft.categories.group('section').level(1).slug(secondSeg).first() %}
  {% set secondLevelCategories = craft.categories.ancestorOf(mainCategory).slug(lastSeg) %}
  
  ```
  
  
  ---
  
  