[PATCH] if the milestone due date is the only given date at all, ALAP scheduling must use it as end date of last successor ticket

[falkb]

related to #9705.

I have several tickets grouped with parent tickets. They all don't have any dates set at all. The only date set is the milestone due date.

ALAP scheduling only works well if I apply this patch:

tracjsganttplugin/0.11/tracjsgantt/tracpm.py

@@ -619 +619 @@
                 if self.isCfg(['pred', 'succ']):
                     pred = []
                     for t in tickets:
-                        if not t['children'] and \
-                                t['milestone'] == row[0] and \
+                        if t['milestone'] == row[0] and \
                                 self.successors(t) == []:
                             if self.isField('succ'):
                                 t[self.fields[self.sources['succ']]] = \

Without this patch, "today" is used as end date of the last successor and the scheduled plan starts in the past, which is completely wrong.

[falkb]

illustrating the scenary, a common one -> milestone2 is the only thing having a date, all tickets just have dependencies, parents and planned hours, milestone3 and 4 do not have a due date, today is 2/Jun, alap mode schedules into the past, that's another story (#9705):