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dynamodb2 was evaluating ProjectionExpression on the wrong local result set

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This commit is contained in:
Eric Reinecke 2017-11-10 21:57:16 -08:00
parent 06492026c3
commit 64fb0207e2
2 changed files with 4 additions and 1 deletions
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3
moto/dynamodb2/models.py
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@ -493,7 +493,8 @@ class Table(BaseModel):
if projection_expression:
expressions = [x.strip() for x in projection_expression.split(',')]
for result in copy.deepcopy(possible_results):
results = copy.deepcopy(results)
for result in results:
for attr in list(result.attrs):
if attr not in expressions:
result.attrs.pop(attr)

2
tests/test_dynamodb2/test_dynamodb.py
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@ -367,8 +367,10 @@ def test_basic_projection_expressions():
)
assert 'body' in results['Items'][0]
assert 'subject' not in results['Items'][0]
assert results['Items'][0]['body'] == 'some test message'
assert 'body' in results['Items'][1]
assert 'subject' not in results['Items'][1]
assert results['Items'][1]['body'] == 'yet another test message'
# The projection expression should not remove data from storage