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Better errors when serializer has incorrectly named field.
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@ -274,7 +274,23 @@ class Field(object):
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Given the *outgoing* object instance, return the primitive value
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that should be used for this field.
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"""
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return get_attribute(instance, self.source_attrs)
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try:
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return get_attribute(instance, self.source_attrs)
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except (KeyError, AttributeError) as exc:
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msg = (
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'Got {exc_type} when attempting to get a value for field '
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'`{field}` on serializer `{serializer}`.\nThe serializer '
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'field might be named incorrectly and not match '
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'any attribute or key on the `{instance}` instance.\n'
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'Original exception text was: {exc}.'.format(
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exc_type=type(exc).__name__,
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field=self.field_name,
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serializer=self.parent.__class__.__name__,
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instance=instance.__class__.__name__,
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exc=exc
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)
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)
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raise type(exc)(msg)
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def get_default(self):
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"""
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@ -1,3 +1,4 @@
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from __future__ import unicode_literals
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from rest_framework import serializers
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import pytest
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@ -175,3 +176,23 @@ class TestStarredSource:
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instance = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
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serializer = self.Serializer(instance)
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assert serializer.data == self.data
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class TestIncorrectlyConfigured:
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def test_incorrect_field_name(self):
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class ExampleSerializer(serializers.Serializer):
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incorrect_name = serializers.IntegerField()
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class ExampleObject:
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def __init__(self):
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self.correct_name = 123
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instance = ExampleObject()
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serializer = ExampleSerializer(instance)
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with pytest.raises(AttributeError) as exc_info:
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serializer.data
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assert str(exc_info.value) == (
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"Got AttributeError when attempting to get a value for field `incorrect_name` on serializer `ExampleSerializer`.\n"
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"The serializer field might be named incorrectly and not match any attribute or key on the `ExampleObject` instance.\n"
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"Original exception text was: ExampleObject instance has no attribute 'incorrect_name'."
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)
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