wcs: let category/form link cells be rendered with alternate templates (#18917)

combo/apps/wcs/models.py

@@ -33,6 +33,8 @@ from .utils import get_wcs_json, is_wcs_enabled, get_wcs_services
 
 @register_cell_class
 class WcsFormCell(CellBase):
+    template_name = 'combo/wcs/form.html'
+
     formdef_reference = models.CharField(_('Form'), max_length=150)
 
     cached_title = models.CharField(_('Title'), max_length=150)
@@ -64,8 +66,8 @@ class WcsFormCell(CellBase):
                     self.cached_json = form
         return super(WcsFormCell, self).save(*args, **kwargs)
 
-    def render(self, context):
-        formdef_template = template.loader.get_template('combo/wcs/form.html')
+    def get_cell_extra_context(self, context):
+        context = super(WcsFormCell, self).get_cell_extra_context(context)
         context['slug'] = self.formdef_reference.split(':')[-1]
         context['title'] = self.cached_title
         context['url'] = self.cached_url
@@ -73,7 +75,7 @@ class WcsFormCell(CellBase):
             for attribute in self.cached_json:
                 if not attribute in context:
                     context[attribute] = self.cached_json.get(attribute)
-        return formdef_template.render(context)
+        return context
 
     def get_additional_label(self):
         if not self.cached_title:
@@ -113,6 +115,7 @@ class WcsCommonCategoryCell(CellBase):
 
 @register_cell_class
 class WcsCategoryCell(WcsCommonCategoryCell):
+    template_name = 'combo/wcs/category.html'
 
     class Meta:
         verbose_name = _('Category Link')
@@ -121,15 +124,15 @@ class WcsCategoryCell(WcsCommonCategoryCell):
         from .forms import WcsCategoryCellForm
         return WcsCategoryCellForm
 
-    def render(self, context):
+    def get_cell_extra_context(self, context):
+        context = super(WcsCategoryCell, self).get_cell_extra_context(context)
         if not self.category_reference:
-            return ''
-        category_template = template.loader.get_template('combo/wcs/category.html')
+            return context
         context['slug'] = self.category_reference.split(':')[-1]
         context['title'] = self.cached_title
         context['description'] = self.cached_description
         context['url'] = self.cached_url
-        return category_template.render(context)
+        return context
 
 
 class WcsBlurpMixin(object):