Just display the signature type to conserve UI space.

mayan/apps/document_signatures/apps.py

@@ -82,31 +82,18 @@ class DocumentSignaturesApp(MayanAppConfig):
             source=SignatureBaseModel, label=_('Date'), attribute='date'
         )
         SourceColumn(
-            source=SignatureBaseModel, label=_('Key ID'), attribute='key_id'
+            source=SignatureBaseModel, label=_('Key ID'),
+            attribute='get_key_id'
         )
         SourceColumn(
             source=SignatureBaseModel, label=_('Signature ID'),
             func=lambda context: context['object'].signature_id or _('None')
         )
-        SourceColumn(
-            source=SignatureBaseModel, label=_('Public key fingerprint'),
-            func=lambda context: context['object'].public_key_fingerprint or _('None')
-        )
         SourceColumn(
             source=SignatureBaseModel, label=_('Is embedded?'),
-            func=lambda context: two_state_template(
+            func=lambda context: SignatureBaseModel.objects.get_subclass(
-                SignatureBaseModel.objects.get_subclass(
+                pk=context['object'].pk
-                    pk=context['object'].pk
+            ).get_signature_type_display()
-                ).is_embedded
-            )
-        )
-        SourceColumn(
-            source=SignatureBaseModel, label=_('Is detached?'),
-            func=lambda context: two_state_template(
-                SignatureBaseModel.objects.get_subclass(
-                    pk=context['object'].pk
-                ).is_detached
-            )
         )
 
         app.conf.CELERY_QUEUES.append(

mayan/apps/document_signatures/models.py

@@ -60,6 +60,18 @@ class SignatureBaseModel(models.Model):
             args=(self.pk,)
         )
 
+    def get_key_id(self):
+        if self.public_key_fingerprint:
+            return self.public_key_fingerprint[-16:]
+        else:
+            return self.key_id
+
+    def get_signature_type_display(self):
+        if self.is_detached:
+            return _('Detached')
+        else:
+            return _('Embedded')
+
     @property
     def is_detached(self):
         return hasattr(self, 'signature_file')