default to true

contracts/admin.py

@@ -123,7 +123,10 @@ class ContractFileAdmin(
 
 class ParentContractInlineMixin:
     def get_parent_object_is_editable(self, obj):
-        return obj.is_editable_without_approve_permission
+        if hasattr(obj, "is_editable_without_approve_permission"):
+            return obj.is_editable_without_approve_permission
+
+        return False
 
     def has_add_permission(self, request, obj=None):
         if (
@@ -165,7 +168,12 @@ class ContracteeSignatureRepresentativeInline(
         elif hasattr(obj, "is_editable_without_approve_permission"):
             return obj.is_editable_without_approve_permission
 
-        return False
+        # FIXME: We MUST return a True value here, since the admin seemingly
+        # creates the parent ContracteeSignature with empty data, then
+        # validates this inline before actually filling any fields.
+        # Thus, it has no `contract` attribute.
+
+        return True
 
     def get_formset(self, request, obj=None, **kwargs):
         formset = super().get_formset(request, obj, **kwargs)
@@ -193,7 +201,12 @@ class SigneeSignatureRepresentativeInline(
         elif hasattr(obj, "is_editable_without_approve_permission"):
             return obj.is_editable_without_approve_permission
 
-        return False
+        # FIXME: We MUST return a True value here, since the admin seemingly
+        # creates the parent ContracteeSignature with empty data, then
+        # validates this inline before actually filling any fields.
+        # Thus, it has no `contract` attribute.
+
+        return True
 
     model = SigneeSignatureRepresentative
     extra = 0

contracts/models.py

@@ -993,7 +993,10 @@ class ContracteeSignature(models.Model):
     )
 
     def __str__(self) -> str:
-        return f"{str(self.contractee)} - {self.date}"
+        if hasattr(self, "contractee"):
+            return f"{str(self.contractee)} - {self.date}"
+        else:
+            return f"Bez smluvní strany - {self.date}"
 
     class Meta:
         app_label = "contracts"
@@ -1030,7 +1033,10 @@ class SigneeSignature(models.Model):
     )
 
     def __str__(self) -> str:
-        return f"{str(self.signee)} - {self.date}"
+        if hasattr(self, "signee"):
+            return f"{str(self.signee)} - {self.date}"
+        else:
+            return f"Bez smluvní strany - {self.date}"
 
     class Meta:
         app_label = "contracts"