Fix tests

Author: fsbraun

djangocms_rest/serializers/plugins.py

@@ -133,7 +133,7 @@ def to_representation(self, instance: CMSPlugin):
                         if field.is_cached(instance)
                         else None,
                     )
-            elif isinstance(field, JSON_FIELDS):
+            elif isinstance(field, JSON_FIELDS) and ret.get(field.name):
                 # If the field is a subclass of JSONField, serialize its value directly
                 ret[field.name] = serialize_soft_refs(request, ret[field.name])
         return ret

tests/endpoints/test_placeholders.py

@@ -221,4 +221,7 @@ def test_serialize_page_fk(self):
         rendered_plugin = response.json()["content"][-1]
         self.assertIn("page", rendered_plugin)
         self.assertIsInstance(rendered_plugin["page"], str)
-        self.assertEqual(rendered_plugin["page"], self.page.get_api_endpoint("en"))
+        self.assertEqual(
+            rendered_plugin["page"],
+            f'http://testserver{self.page.get_api_endpoint("en")}',
+        )

tests/test_edit_endpoint.py

@@ -153,13 +153,13 @@ def test_edit_endpoint(self):
         # Test link plugin resolves link to page API endpoint
         self.assertContains(
             response,
-            '<span class="key">"page"</span>: <span class="str">"/api/en/pages-root/"</span>',
+            '<span class="key">"page"</span>: <span class="str">"http://testserver/api/en/pages-root/"</span>',
         )
 
         # Test image plugin resolves image URL
         self.assertContains(
             response,
-            f'"filer_image"</span>: <span class="str">"<span class="ellipsis">{self.image_plugin.filer_image.url}</span>"</span>',
+            f'"filer_image"</span>: <span class="str">"<span class="ellipsis">http://testserver{self.image_plugin.filer_image.url}</span>"</span>',
         )
 
         # Test for rendering of numbers