I need to iterate through the date entries and want compare them to other dates, but I get only one value, what am I doing wrong ?

    @property
    def mathe2(self):
        for i in self.lehrertabelle_set.all():
            return i.from_date

CodePudding user response：

return statement returns value and exits the method so no more values will be checked.

If you want to iterate through all of them and check something then use:

for i in self.lehrertabelle_set.all():
    if i.from_date == something:
        # do something

If you want to get a list of lehrertabelle in a given range then filter queryset using gte (greater then or equal) and lte (less then or equal):

qs_in_range = self.lehrertabelle_set.filter(from_date__gte=start_date, from_date__lte=end_date)

you can read more here: https://docs.djangoproject.com/en/4.1/ref/models/querysets/#field-lookups

CodePudding user response：

You can do something like this:

@property
def mathe2(self):
    date_list = []
    now = datetime.now()
    for i in self.lehrertabelle_set.all():
        if i.date == now:
            date_list.append(i)
    return date_list