title: Laravel validation required_without_all
body: <p>Call me stupid, but I can't get it :)
  I want to set up validator rule, so it will pass only if one of the two fields is present (adgroup or all_adgroups).  </p>
  
  <p>Here is my controller:</p>
  
  <pre><code> $this-&gt;validate($request,
          [
              'new_target_cpa_value' =&gt; 'required|numeric',
              'adgroups' =&gt; 'exists:google.ad_groups,id|required_without_all:all_agroups',
              'all_agroups' =&gt; 'required_without_all:adgroups'
          ]
      );
      dd($request-&gt;all());
  </code></pre>
  
  <p>Here is dd:</p>
  
  <p><code>"_token" =&gt; "aHjluUXPuZpEbglmVt4UePhriGvRWDOjk3OgfF88"
    "new_target_cpa_value" =&gt; "123"
    "adgroups" =&gt; array:1 [▶]
    "all_agroups" =&gt; "1"</code></p>