fix: let view subclass more easily inject kwargs for make_batch()

src/wuttaweb/views/batch.py

@@ -203,12 +203,15 @@ class BatchMasterView(MasterView):
             f.set_node('executed_by', UserRef(self.request))
             f.set_readonly('executed_by')
 
-    def objectify(self, form):
+    def objectify(self, form, **kwargs):
         """
         We override the default logic here, to invoke
         :meth:`~wuttjamaican:wuttjamaican.batch.BatchHandler.make_batch()`
         on the batch handler - when creating.  Parent/default logic is
         used when updating.
+
+        :param \**kwargs: Additional kwargs will be passed as-is to
+           the ``make_batch()`` call.
         """
         if self.creating:
 
@@ -219,15 +222,18 @@ class BatchMasterView(MasterView):
             batch = schema.objectify(form.validated, context=form.model_instance)
 
             # then we collect attributes from the new batch
-            kwargs = dict([(key, getattr(batch, key))
+            kw = dict([(key, getattr(batch, key))
                        for key in form.validated
                        if hasattr(batch, key)])
 
             # and set attribute for user creating the batch
-            kwargs['created_by'] = self.request.user
+            kw['created_by'] = self.request.user
+
+            # plus caller can override anything
+            kw.update(kwargs)
 
             # finally let batch handler make the "real" batch
-            return self.batch_handler.make_batch(self.Session(), **kwargs)
+            return self.batch_handler.make_batch(self.Session(), **kw)
 
         # when not creating, normal logic is fine
         return super().objectify(form)