Issues with DateTime ISO fields

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#29 opened on Mar 13, 2020 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 45/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: python
Domain: api

Research direction

Start by inspecting gql/renderer_dataclasses.py around lines 153-160, especially how suffix is handled for nullable DateTime fields and when DATETIME_FIELD is selected. Reproduce the gql_run query with a DateTime result and verify that the generated dataclass can deserialize the returned ISO value without the reported TypeError.

Written by the indexing model from the issue text.

Description

when i run gql_run and the renderer_dataclasses.py encounters a DateTime field it generates a field:

var_name: datetime = None

when I run a query that returns a datetime object I get the following error:

File "/Users/jasper/Documents/test/test-graph-python-client/env/lib/python3.7/site-packages/dataclasses_json/core.py", line 220, in _decode_generic
    res = _get_type_cons(type_)(xs)
  File "/Users/jasper/Documents/test/test-graph-python-client/env/lib/python3.7/site-packages/dataclasses_json/core.py", line 260, in <genexpr>
    for x in xs)
  File "/Users/jasper/Documents/test/test-graph-python-client/env/lib/python3.7/site-packages/dataclasses_json/core.py", line 165, in _decode_dataclass
    infer_missing)
  File "/Users/jasper/Documents/test/test-graph-python-client/env/lib/python3.7/site-packages/dataclasses_json/core.py", line 179, in _decode_dataclass
    dt = datetime.fromtimestamp(field_value, tz=tz)
TypeError: an integer is required (got type str)

I think this is because in:
https://github.com/graphql-python/gql-next/blob/5c81e58862c8df3a335b81bb2f77a0fab2c50570/gql/renderer_dataclasses.py#L153-L160

suffix is being overwritten if the field is nullable and DATETIME_FIELD isn't being used.

Dominant language: Python
Stars: 78
Forks: 6
PR merge metrics: No merged PRs in 30d

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