title: How to skip blank rows in maatwebsite-excel 3.1 for model-way import on Laravel
body: <p>I'm working on laravel project with <code>maatwebsite-exvel 3.1</code> to import excel file from file uploding method. This is my <code>StudentsImport</code> class.</p>
  
  <pre><code>public function model(array $row)
  {
      return new Student([
          'school_uuid' =&gt; Auth::user()-&gt;school_uuid,
          'cardid'     =&gt; $row[0],
          'prefix'    =&gt; $row[1], 
          'name'    =&gt; $row[2], 
          'lastname'    =&gt; $row[3], 
          'dob'    =&gt; $row[4], 
          'address'    =&gt; $row[5], 
          'phone'    =&gt; $row[6], 
      ]);
  }
  </code></pre>
  
  <p>And below is controller.</p>
  
  <pre><code> Excel::import(new StudentsImport,  $request-&gt;file('file'));
  </code></pre>
  
  <p>Code work fine. I can import excel's data to database but blank rows also imported. I would like to filter/validate to skip these blanks before put to database. Any advice or guidance on this would be greatly appreciated, Thanks</p>