Fixes #16624: Set allow_null=True on method fields that can return None #16627
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Fixes: #16624
Noticed that Device.parent_device was not marked as nullable in the swagger api docs. Went through all uses of
SerializerMethodField
and addedallow_null=True
if the method could returnNone
.I opted to add it to the
@extend_schema_field
decorator where possible because that's howallow_null
was set on other methods that could returnNone
.