Detecting Overlapping Events

[switchtower]

Curious if you ever thought of adding a check in the form clean method to check for overlapping occurrences with the rrules being used in the submitted form?

Thanks for the great code!

[kvps]

Is there a way to handle this with current code? I am having the same situation.
Thanks!!!

[rfj001]

Here's what I am doing... I cloned the repo and modified the source directly to add a method to the OccurrenceManager class, but you could just write a function that takes two occurrences, or subclass occurrence.

def occurrence_at_time_exists(self, start, end, occurrence_set=None):
        if not occurrence_set:
            occurrence_set = Occurrence.objects.all()
        occurrence_set.filter(start_time__lte=start, end_time__gte=start)
        overlaps = occurrence_set.filter(
            models.Q(start_time__lte=start, end_time__gt=start) |
            models.Q(start_time__gte=start, start_time__lt=end) |
            models.Q(start_time=start, end_time=end)
        ).exists()
        return overlaps

Note that this implementation returns False if one occurrence begins at the same time that the other ends. For example, if I have an occurrence from 9:00-10:00 and another from 10:00-11:00 this would not interpret them as overlapping.

[kvps]

Thanks. I am working more modifications on swingtime code, this really helps. Thanks again!!!