In [51]: class TestDecimal(serializers.Serializer):
 ...: something = serializers.DecimalField(decimal_places=4, max_digits=4)
 ...: 
In [52]: TestDecimal({"something": "0.100123"}).data # i know that there should be an object - added dict only to shorten the code
Out[52]: {'something': '0.1001'}
In [53]: TestDecimal({"something": "1.000"}).data
---------------------------------------------------------------------------
InvalidOperation Traceback (most recent call last)
Cell In[53], line 1
----> 1 TestDecimal({"something": "1.000"}).data
File /usr/local/lib/python3.10/site-packages/rest_framework/serializers.py:555, in Serializer.data(self)
 553 @property
 554 def data(self):
--> 555 ret = super().data
 556 return ReturnDict(ret, serializer=self)
File /usr/local/lib/python3.10/site-packages/rest_framework/serializers.py:253, in BaseSerializer.data(self)
 251 if not hasattr(self, '_data'):
 252 if self.instance is not None and not getattr(self, '_errors', None):
--> 253 self._data = self.to_representation(self.instance)
 254 elif hasattr(self, '_validated_data') and not getattr(self, '_errors', None):
 255 self._data = self.to_representation(self.validated_data)
File /usr/local/lib/python3.10/site-packages/rest_framework/serializers.py:522, in Serializer.to_representation(self, instance)
 520 ret[field.field_name] = None
 521 else:
--> 522 ret[field.field_name] = field.to_representation(attribute)
 524 return ret
File /usr/local/lib/python3.10/site-packages/rest_framework/fields.py:1081, in DecimalField.to_representation(self, value)
 1078 if not isinstance(value, decimal.Decimal):
 1079 value = decimal.Decimal(str(value).strip())
-> 1081 quantized = self.quantize(value)
 1083 if not coerce_to_string:
 1084 return quantized
File /usr/local/lib/python3.10/site-packages/rest_framework/fields.py:1100, in DecimalField.quantize(self, value)
 1098 if self.max_digits is not None:
 1099 context.prec = self.max_digits
-> 1100 return value.quantize(
 1101 decimal.Decimal('.1') ** self.decimal_places,
 1102 rounding=self.rounding,
 1103 context=context
 1104 )
InvalidOperation: [<class 'decimal.InvalidOperation'>]