feat: Add preview link to Alias AliasContent Manager versioning actio…

…ns (#89)

CHANGELOG.rst

@@ -4,7 +4,8 @@ Changelog
 
 Unreleased
 ==========
-* Add versioning actions to Alias AliasContent Manager
+* feat: Add preview link to Alias AliasContent Manager versioning actions
+* feat: Add versioning actions to Alias AliasContent Manager
 * feat: Github Actions integration
 * Python 3.8, 3.9 support added
 * Django 3.0, 3.1 and 3.2 support added

djangocms_alias/admin.py

@@ -1,4 +1,5 @@
 from django.contrib import admin
+from django.template.loader import render_to_string
 from django.utils.translation import gettext_lazy as _
 
 from cms.utils.permissions import get_model_permission_codename
@@ -124,3 +125,37 @@ def delete_model(self, request, obj):
         # Versioning emits it's own signals for changes
         if not is_versioning_enabled():
             emit_content_delete([obj], sender=self.model)
+
+    def get_list_actions(self):
+        """
+        Collect rendered actions from implemented methods and return as list
+        """
+        return [
+            self._get_preview_link,
+            self._get_manage_versions_link,
+        ]
+
+    def _get_preview_link(self, obj, request, disabled=False):
+        """
+        Return a user friendly button for previewing the content model
+        :param obj: Instance of versioned content model
+        :param request: The request to admin menu
+        :param disabled: Should the link be marked disabled?
+        :return: Preview icon template
+        """
+        preview_url = obj.get_absolute_url()
+        if not preview_url:
+            disabled = True
+
+        return render_to_string(
+            "djangocms_versioning/admin/icons/preview.html",
+            {"url": preview_url, "disabled": disabled},
+        )
+
+    def change_view(self, request, object_id, form_url='', extra_context=None):
+        extra_context = extra_context or {}
+        # Provide additional context to the changeform
+        extra_context['is_versioning_enabled'] = is_versioning_enabled()
+        return super().change_view(
+            request, object_id, form_url, extra_context=extra_context,
+        )

tests/test_admin.py

@@ -98,6 +98,10 @@ def test_alias_content_manager_rendering_without_versioning_actions(self):
             expected_en_content.name,
             response_content_decoded,
         )
+        self.assertNotIn(
+            expected_en_content.get_absolute_url(),
+            response_content_decoded,
+        )
 
     @skipUnless(is_versioning_enabled(), 'Test only relevant for versioning')
     def test_alias_content_manager_rendering_with_versioning_actions(self):
@@ -171,3 +175,7 @@ def test_alias_content_manager_rendering_with_versioning_actions(self):
             localize(localtime(latest_alias_content_version.modified)),
             response_content_decoded,
         )
+        self.assertIn(
+            expected_en_content.get_absolute_url(),
+            response_content_decoded,
+        )