Question

I have a model Y with 3 fields. In this model Y, I have 5 entries.

I know that I can use:

from django.core import serializers

def aMethodThatReturnsJson():
    return HttpResponse(serializers.serialize("json", Y.objects.all()))

This returns a proper json response.

But when I change the method to return only 1 row from the model, like below, I get Model Y is not iterable error:

def returnOnlyOneRow():
    return HttpResponse(serializers.serialize("json", Y.objects.get(pk=1)))

Why does this not return a proper json object? What is the correct way to do it?

Thanks.

Answer 1

Here is the way to do it:

from django.core import serializers

def return_only_one_row():
    return HttpResponse(serializers.serialize("json", Y.objects.filter(pk=1)))

Using filter() instead of get() returns the proper JSON response.

Another way to do it would be to use Python lists. You can wrap the query in [ ] to turn the resulting response to a list and then serialize it to JSON. Example follows:

def return_only_one_row():
    return HttpResponse(serializers.serialize("json", [Y.objects.get(pk=1)]))