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Merge pull request #786 from jkimbo/deduplicator
Deduplicator
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from collections import Mapping, OrderedDict | ||
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def deflate(node, index=None, path=None): | ||
if index is None: | ||
index = {} | ||
if path is None: | ||
path = [] | ||
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if node and 'id' in node and '__typename' in node: | ||
route = ','.join(path) | ||
cache_key = ':'.join([route, str(node['__typename']), str(node['id'])]) | ||
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if index.get(cache_key) is True: | ||
return { | ||
'__typename': node['__typename'], | ||
'id': node['id'], | ||
} | ||
else: | ||
index[cache_key] = True | ||
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field_names = node.keys() | ||
result = OrderedDict() | ||
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for field_name in field_names: | ||
value = node[field_name] | ||
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new_path = path + [field_name] | ||
if isinstance(value, (list, tuple)): | ||
result[field_name] = [ | ||
deflate(child, index, new_path) for child in value | ||
] | ||
elif isinstance(value, Mapping): | ||
result[field_name] = deflate(value, index, new_path) | ||
else: | ||
result[field_name] = value | ||
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return result |
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import datetime | ||
import graphene | ||
from graphene import relay | ||
from graphene.types.resolver import dict_resolver | ||
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from ..deduplicator import deflate | ||
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def test_does_not_modify_object_without_typename_and_id(): | ||
response = { | ||
'foo': 'bar', | ||
} | ||
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deflated_response = deflate(response) | ||
assert deflated_response == { | ||
'foo': 'bar', | ||
} | ||
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def test_does_not_modify_first_instance_of_an_object(): | ||
response = { | ||
'data': [ | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
}, | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
} | ||
] | ||
} | ||
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deflated_response = deflate(response) | ||
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assert deflated_response == { | ||
'data': [ | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
}, | ||
{ | ||
'__typename': 'foo', | ||
'id': 1 | ||
} | ||
] | ||
} | ||
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def test_does_not_modify_first_instance_of_an_object_nested(): | ||
response = { | ||
'data': [ | ||
{ | ||
'__typename': 'foo', | ||
'bar1': { | ||
'__typename': 'bar', | ||
'id': 1, | ||
'name': 'bar' | ||
}, | ||
'bar2': { | ||
'__typename': 'bar', | ||
'id': 1, | ||
'name': 'bar' | ||
}, | ||
'id': 1 | ||
}, | ||
{ | ||
'__typename': 'foo', | ||
'bar1': { | ||
'__typename': 'bar', | ||
'id': 1, | ||
'name': 'bar' | ||
}, | ||
'bar2': { | ||
'__typename': 'bar', | ||
'id': 1, | ||
'name': 'bar' | ||
}, | ||
'id': 2 | ||
} | ||
] | ||
} | ||
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deflated_response = deflate(response) | ||
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assert deflated_response == { | ||
'data': [ | ||
{ | ||
'__typename': 'foo', | ||
'bar1': { | ||
'__typename': 'bar', | ||
'id': 1, | ||
'name': 'bar' | ||
}, | ||
'bar2': { | ||
'__typename': 'bar', | ||
'id': 1, | ||
'name': 'bar' | ||
}, | ||
'id': 1 | ||
}, | ||
{ | ||
'__typename': 'foo', | ||
'bar1': { | ||
'__typename': 'bar', | ||
'id': 1 | ||
}, | ||
'bar2': { | ||
'__typename': 'bar', | ||
'id': 1 | ||
}, | ||
'id': 2 | ||
} | ||
] | ||
} | ||
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def test_does_not_modify_input(): | ||
response = { | ||
'data': [ | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
}, | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
} | ||
] | ||
} | ||
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deflate(response) | ||
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assert response == { | ||
'data': [ | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
}, | ||
{ | ||
'__typename': 'foo', | ||
'id': 1, | ||
'name': 'foo' | ||
} | ||
] | ||
} | ||
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TEST_DATA = { | ||
'events': [ | ||
{ | ||
'id': '568', | ||
'date': datetime.date(2017, 5, 19), | ||
'movie': '1198359', | ||
}, | ||
{ | ||
'id': '234', | ||
'date': datetime.date(2017, 5, 20), | ||
'movie': '1198359', | ||
}, | ||
], | ||
'movies': { | ||
'1198359': { | ||
'name': 'King Arthur: Legend of the Sword', | ||
'synopsis': ( | ||
"When the child Arthur's father is murdered, Vortigern, " | ||
"Arthur's uncle, seizes the crown. Robbed of his birthright and " | ||
"with no idea who he truly is..." | ||
), | ||
}, | ||
}, | ||
} | ||
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def test_example_end_to_end(): | ||
class Movie(graphene.ObjectType): | ||
class Meta: | ||
interfaces = (relay.Node,) | ||
default_resolver = dict_resolver | ||
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name = graphene.String(required=True) | ||
synopsis = graphene.String(required=True) | ||
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class Event(graphene.ObjectType): | ||
class Meta: | ||
interfaces = (relay.Node,) | ||
default_resolver = dict_resolver | ||
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movie = graphene.Field(Movie, required=True) | ||
date = graphene.types.datetime.Date(required=True) | ||
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def resolve_movie(event, info): | ||
return TEST_DATA['movies'][event['movie']] | ||
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class Query(graphene.ObjectType): | ||
events = graphene.List( | ||
graphene.NonNull(Event), | ||
required=True | ||
) | ||
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def resolve_events(_, info): | ||
return TEST_DATA['events'] | ||
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schema = graphene.Schema(query=Query) | ||
query = """\ | ||
{ | ||
events { | ||
__typename | ||
id | ||
date | ||
movie { | ||
__typename | ||
id | ||
name | ||
synopsis | ||
} | ||
} | ||
} | ||
""" | ||
result = schema.execute(query) | ||
assert not result.errors | ||
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result.data = deflate(result.data) | ||
assert result.data == { | ||
'events': [ | ||
{ | ||
'__typename': 'Event', | ||
'id': 'RXZlbnQ6NTY4', | ||
'date': '2017-05-19', | ||
'movie': { | ||
'__typename': 'Movie', | ||
'id': 'TW92aWU6Tm9uZQ==', | ||
'name': 'King Arthur: Legend of the Sword', | ||
'synopsis': ( | ||
"When the child Arthur's father is murdered, Vortigern, " | ||
"Arthur's uncle, seizes the crown. Robbed of his birthright and " | ||
"with no idea who he truly is..." | ||
), | ||
}, | ||
}, | ||
{ | ||
'__typename': 'Event', | ||
'id': 'RXZlbnQ6MjM0', | ||
'date': '2017-05-20', | ||
'movie': { | ||
'__typename': 'Movie', | ||
'id': 'TW92aWU6Tm9uZQ==', | ||
}, | ||
}, | ||
], | ||
} |