Add Binary data into django rest framework API

Question

model.py

class TblSnapshot(models.Model):
    url = models.CharField(max_length=500)
    snapshot = models.BinaryField()

I want to add Binary Data in API, but it's generating error

TypeError at /api
__str__ returned non-string (type memoryview)

Can you post the full traceback and the code for your serializer? — Will Keeling
– Will Keeling, Commented Jan 9, 2020 at 8:32

Jura Brazdil · Accepted Answer · 2020-01-09 09:46:29Z

1

You'll need to implement a custom field (as per here). This is how your serializer would look for such model

class BinaryField(serializers.Field):
    def to_representation(self, value):
        return value.decode('utf-8')

    def to_internal_value(self, value):
        return value.encode('utf-8')

class TblSnapshotSerializer(serializers.ModelSerializer):
    class Meta:
        model = TblSnapshot
        fields = ('id', 'url', 'snapshot')

    snapshot = BinaryField()

answered Jan 9, 2020 at 9:46

Jura Brazdil

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3 Comments

Umair Lakhani Over a year ago

it's giving error of 'Tblsnapshot' object has no attribute 'decode' @Jura- brazdil

Jura Brazdil Over a year ago

Seems like the serializer gets a whole TblSnapshot objects into its snapshot field. It's tblsnapshot.snapshot that is the binary value and has the decode method. Can you post your view?

Umair Lakhani Over a year ago

actually I am using primary key of Tblsnapshot from another table as a foreign key

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