title: hasMany relationship with conditions
body: <p>The subject may be a common question but I have a bit more deeper problem. I am a freshman in CakePhp and already googled the issue. Unfortunately I could not find my exact solution.</p>
  
  <p>My database structure is below with two tables and I used cakePhp naming conventions:</p>
  
  <pre><code>- news (id, news_title, news_text, is_active, created, modified)
  
  - news_images (id, news_id, image_src, is_default, created, modified)
  </code></pre>
  
  <blockquote>
    <p>Each news has many images. But one image is being selected as default
    to-be used as a thumbnail in homepage.</p>
  </blockquote>
  
  <p>In news listing pages, I want to list all news with a thumbnail. <strong>Thumbnail means, news_images.is_default=true</strong></p>
  
  <p>So I have to make a hasMany relationship but filtering with is_default=true</p>
  
  <p>If I simply fetched data after hasMany and belongsTo relationship without using any conditions, it's retrieving all images. And I could not succeeded bingModal or container while I am too new to cakePhp.</p>
  
  <p>I would like to request your help.
  Thanks in advance.</p>