title: Rails - Get records of a specific id and store it in an Array
body: <p>How do I get records from a table with a specific ID and store these records in an Array?</p>
  
  <p>For better understanding I try to explain it to you more clear:</p>
  
  <p>Imagine a table with the following columns: <strong>(ID,FIX_ID,AMOUNT)</strong></p>
  
  <p>where <strong>ID</strong> is an unique ID which always will auto_incremented by 1.</p>
  
  <p><strong>FIX_ID</strong> is an ID which can appear multiple times in the table.</p>
  
  <p>And <strong>AMOUNT</strong> is just a simple type which represents the amount of some "things".</p>
  
  <hr>
  
  <p>So all I want to get now is every record from the table which have the <strong>FIX_ID</strong> that I am looking for.
  Remember: The <strong>FIX_ID</strong> is not unique => it can appear multiple times.</p>
  
  <p>And that's it. So imagine that I want to get all records with the <strong>FIX_ID</strong> of 10. All these records which I will get should be stored in an Array.</p>
  
  <p>My question to you: Is it possible to realize this "request" to the database with ActiveRecord?
  If so, then how?</p>