Mail links

* adds direct object links into mail templates
* refactors transferring app-model identification data from fore- to background (celery) properly

ema/models/ema.py

@@ -19,6 +19,7 @@ from ema.settings import EMA_IDENTIFIER_LENGTH, EMA_IDENTIFIER_TEMPLATE, EMA_LAN
     EMA_LANIS_LAYER_NAME_UNRECORDED
 from ema.utils.quality import EmaQualityChecker
 from konova.models import AbstractDocument, generate_document_file_upload_path, RecordableObjectMixin, ShareableObjectMixin
+from konova.sub_settings.django_settings import BASE_URL
 from konova.utils.message_templates import DATA_UNSHARED_EXPLANATION, DOCUMENT_REMOVED_TEMPLATE
 
 
@@ -46,6 +47,12 @@ class Ema(AbstractCompensation, ShareableObjectMixin, RecordableObjectMixin, Pik
     def __str__(self):
         return "{}".format(self.identifier)
 
+    def get_detail_url(self):
+        return reverse("ema:detail", args=(self.id,))
+
+    def get_detail_url_absolute(self):
+        return BASE_URL + self.get_detail_url()
+
     def save(self, *args, **kwargs):
         if self.identifier is None or len(self.identifier) == 0:
             # Create new identifier