Biest 1780

Closes #1780

Merge request !1162

app/views/oer/market/_materials.php

 <? foreach ($materialien as $material) : ?>
-    <?= $this->render_partial("oer/market/_material_short.php", compact("material", "plugin")) ?>
+    <?= $this->render_partial('oer/market/_material_short.php', compact('material')) ?>
 <? endforeach ?>

app/views/oer/market/index.php

@@ -35,11 +35,11 @@ if (!empty($materialien)) {
 </form>
 
 
-<? if ($new_ones) : ?>
+<? if (!empty($new_ones)) : ?>
     <div id="new_ones">
         <h2><?= _('Neuste Materialien') ?></h2>
         <ul class="oer_material_overview">
-            <?= $this->render_partial("oer/market/_materials.php", ['materialien' => $new_ones]) ?>
+            <?= $this->render_partial('oer/market/_materials.php', ['materialien' => $new_ones]) ?>
         </ul>
     </div>
 <? endif ?>

app/views/oer/market/search.php

-<? if ($materialien) : ?>
+<? if (!empty($materialien)) : ?>
     <ul class="oer_material_overview mainlist">
-        <?= $this->render_partial("oer/market/_materials.php", compact("material", "plugin")) ?>
+        <?= $this->render_partial('oer/market/_materials.php', compact('materialien')) ?>
     </ul>
 <? else : ?>
     <?= MessageBox::info(_('Keine Materialien gefunden')) ?>

app/views/oer/market/type.php

-<? if ($materialien) : ?>
+<? if (!empty($materialien)) : ?>
     <ul class="oer_material_overview mainlist">
-        <?= $this->render_partial("oer/market/_materials.php", compact("material", "plugin")) ?>
+        <?= $this->render_partial('oer/market/_materials.php', compact('materialien')) ?>
     </ul>
 <? else : ?>
     <?= MessageBox::info(_('Keine Materialien gefunden')) ?>