98đź‘Ť
You can use exclude() in place of filter():
Entry.objects.exclude(name__contains="SomeString")
(“give me all entries EXCEPT those with names containing “SomeString”)
And when dealing with Q object you can use “~” symbol before Q object to represent negation. For example the following statement means “give me all Entries with names containing “Elephant”, but NOT containing “SomeString”:
Entry.objects.filter(Q(name__contains="Elephant") & ~Q(name__contains="SomeString"))
In some cases you may want to use both methods:
Entry.objects.exclude(Q(name__contains="Elephant") & ~Q(name__contains="SomeString"))
(“give me all entries, EXCEPT those with names containing “Elephant”, but NOT containing “SomeString”)
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3đź‘Ť
Either use exclude as Hank suggests or, for the particular contains case, use Q(name__regex=r’!(SomeString)’) if you really really need to use the filter. Be warned though that regex is not database-agnostic, check what syntax your db supports first.
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