Symfony2 / Twig-错误消息：注意：试图获取非对象的属性

Question

I am trying render an array on my page with Twig, but always I get the following error code:

An exception has been thrown during the rendering of a template ("Notice: Trying to get property of non-object in C:\\xampp\\htdocs\\JPP\\app\\cache\\dev\\classes.php line 10098") in ProfileBundle:Profile:profile.html.twig at line 228.

When I look at profile.html.twig i see the following for-loop:

                    `{% for Educations in Education|sortByDate %}
                    <div id="education{{loop.index0}}">                               
                            <tr>
                                <td class="border">{{ Educations.fromDate|date('d-m-Y') }}</td>
                                <td>&nbsp;</td>
                                <td class="border">{{ Educations.toDate|date('d-m-Y') }}</td>
                                <td>&nbsp;</td>                                    
                                <td class="border">{{ Educations.company }}</td>
                                <td>&nbsp;</td>
                                <td class="border" id="jobsChar{{loop.index0}}">{{ Educations.jobs }}</td>
                                <td>&nbsp;</td>
                                <td class="border"><input type="button" title="Show Details" class="showDetails"  id="details_show{{loop.index0}}"/><input type="button" title="Edit" class="editJob" id="education_edit{{loop.index0}}" /><form style="display:inline" action="../deleteJob" id="deleteJob"><input type="button" title="Delete Job" class="deleteJob" id="job_delete{{loop.index0}}" /></form></td>
                            </tr></div>{% endfor %}` 

In the following you can see the array which should be processed by the for-loop of TWIG, but without success...

array(5) { [0]=> array(9) { ["id"]=> int(80) ["userId"]=> int(3) ["company"]=> string(24) "Solothurner Spitäler AG" ["jobArea"]=> int(0) ["subJobsArea"]=> int(0) ["jobs"]=> int(2) ["jobLabel"]=> string(8) "Förster" ["fromDate"]=> object(DateTime)#437 (3) { ["date"]=> string(19) "2010-01-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } ["toDate"]=> object(DateTime)#436 (3) { ["date"]=> string(19) "2011-02-09 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } } [1]=> array(9) { ["id"]=> int(87) ["userId"]=> int(3) ["company"]=> string(6) "TOP IT" ["jobArea"]=> int(0) ["subJobsArea"]=> int(0) ["jobs"]=> int(3) ["jobLabel"]=> string(20) "Dipl. Pflegefachfrau" ["fromDate"]=> object(DateTime)#433 (3) { ["date"]=> string(19) "2008-05-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } ["toDate"]=> object(DateTime)#432 (3) { ["date"]=> string(19) "2009-05-22 00:00:00" ["timezone_type"]=> int(3) [ "timezone"]=> string(13) "Europe/Berlin" } } [2]=> array(9) { ["id"]=> int(103) ["userId"]=> int(3) ["company"]=> string(10) "Helsana AG" ["jobArea"]=> int(0) ["subJobsArea"]=> int(0) ["jobs"]=> int(1) ["jobLabel"]=> string(11) "Holffäller" ["fromDate"]=> object(DateTime)#430 (3) { ["date"]=> string(19) "2012-10-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } ["toDate"]=> object(DateTime)#429 (3) { ["date"]=> string(19) "2013-05-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } } [3]=> array(9) { ["id"]=> int(104) ["userId"]=> int(3) ["company"]=> string(8) "ALPIQ AG" ["jobArea"]=> int(0) ["subJobsArea"]=> int(0) ["jobs"]=> int(2) ["jobLabel"]=> string(8) "Förster" ["fromDate"]=> object(DateTime)#427 (3) { ["date"]=> string(19) "2013-05-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } ["toDate"]=> object(DateTime)#426 (3) { ["date"]=> string(19) "2013-05-09 00:00:00" ["timezone_ty pe"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } } [4]=> array(9) { ["id"]=> int(130) ["userId"]=> int(3) ["company"]=> string(8) "ALPIQ AG" ["jobArea"]=> int(0) ["subJobsArea"]=> int(0) ["jobs"]=> int(2) ["jobLabel"]=> string(8) "Förster" ["fromDate"]=> object(DateTime)#424 (3) { ["date"]=> string(19) "2013-05-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } ["toDate"]=> object(DateTime)#439 (3) { ["date"]=> string(19) "2013-05-09 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } } }

Please can you help me? Thank you very much.

Cheers Roger

Answer 1

By default, Twig will try to escape returned data from filters. It's possible that Twig doesn't expect the return result to be an array and break it. Try setting "is_safe" to true when defining your Twig filter.

If that doesn't work, I doubt you can use a filter like that. Filters are generally used for text manipulation, not complex data. You could try definining a function instead of a filter, or in worst case process your data where you should => the controller.

Answer 2

Your problem isn't in twig, add a line in the beginning {{ dump(Educations) }} and I'm sure it will return null. The problem is in the controller, you said you dump it and it worked, but I'm assuming you dumped it in the controller, can you please add the action code or the last few lines of it so see how exactly you are passing the variable to the template.

Answer 3

您可以尝试删除“ | sortByDate”吗？