I have done this to omit the instance completely.
In models.py
class FooModel(models.Model):
@cached_property
def foo(self):
# Do the operation here
raise CustomException
In serializers.py
class FooSerializer(serializers.ModelSerializer):
def to_representation(self, instance):
try:
return super().to_representation(instance)
except CustomException:
return None
Now in the browsable API views I see null for instances which raises
CustomException like this:
{
"count": 5,
"next": null,
"previous": null,
"results": [
null,
null,
null,
null,
null
]
}
The next thing I want is to completely remove these null values from the
response, Looking at code of ListModelMixin, I don't think it will be
straight forward.
On Thursday, July 2, 2020 at 3:21:08 PM UTC+5:30, Gagan Deep wrote:
>
> This is all what I am doing, Dipendra.
>
> I have observed that if an inbuilt exception is raised for an object, that
> field get's omitted in the Browsable API list view. I want to achieve the
> same functionality but for whole object.
>
>
> On Thursday, July 2, 2020 at 2:05:55 AM UTC+5:30, DIPENDRA BHATT wrote:
>>
>> Happy to help,
>> Though if you list your exact requirements and what you done to solve
>> them, we might be able to provide much concise and standard solution
>> instead of writing some hacky code.
>>
>>
>> On Thu, Jul 2, 2020, 1:51 AM Gagan Deep <the.one.a...@gmail.com> wrote:
>>
>>> Thanks for such a prompt response.
>>>
>>> I am catching a custom exception here.
>>>
>>> I don't think filtering the queryset will solve the problem since the
>>> exception is raised after performing some operation on properties of
>>> object. I will explore if it can be done through validation.
>>> Thanks again! 😄
>>>
>>> On Thu, 2 Jul, 2020, 1:43 AM DIPENDRA BHATT, <dipenb...@gmail.com>
>>> wrote:
>>>
>>>> Serializermethodfield is a read only field used to append some custom
>>>> data to the serialization of objects. If you wanna skip this object in
>>>> case
>>>> a exception occurs to fetch the custom field, this probably was a
>>>> validation/filtering issue on the quesryset part which is being supplied
>>>> to
>>>> the serializer class to serialize the queryset. It's better if you do the
>>>> validation/filtering part of the queryset before hand(checkout django
>>>> filters, awesome library) and then when your query set has only those
>>>> objects which you want serialize them.
>>>>
>>>>
>>>> On Thu, Jul 2, 2020, 1:23 AM Brent O'Connor <epic...@gmail.com> wrote:
>>>>
>>>>> What exception is it throwing?
>>>>>
>>>>> On Wednesday, July 1, 2020 at 2:49:46 PM UTC-5, Gagan Deep wrote:
>>>>>>
>>>>>> I have a SerializerMethodField in serializer. I am catching an
>>>>>> exception in the function like below. I want to skip this object in the
>>>>>> ListView entirely if that exception is caught. How can I do this?
>>>>>>
>>>>>> I am using ListApiView from rest_framework.generics
>>>>>>
>>>>>>
>>>>>> classFooSerializer(serializers.ModelSerializer):
>>>>>> foo = serializers.SerializerMethodField()
>>>>>>
>>>>>> get_foo(self, object):
>>>>>> try:
>>>>>> # Do something here
>>>>>> except:
>>>>>> # If an exception is captured than skip this object
>>>>>>
>>>>>>
>>>>>> --
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>>>>>
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>>>>> .
>>>>>
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>>
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