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feat(client): add transaction isolation level #878

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@jonathanblade jonathanblade commented Jan 23, 2024

Change Summary

Add support for interactive transactions with an isolation level.

Closes #463.

Checklist

  • Unit tests for the changes exist
  • Tests pass without significant drop in coverage
  • Documentation reflects changes where applicable
  • Test snapshots have been updated if applicable

Agreement

By submitting this pull request, I confirm that you can use, modify, copy and redistribute this contribution, under the terms of your choice.

Comment on lines 255 to 280
# TODO: remove after issue will be resolved
@pytest.mark.skipif(CURRENT_DATABASE in ['mysql', 'mariadb'], reason='https://github.com/prisma/prisma/issues/22890')
async def test_isolation_level(
client: Prisma, raw_queries: RawQueries, input_level: prisma.TransactionIsolationLevel, expected_level: str
) -> None:
"""A transaction isolation level is set correctly"""
async with client.tx(isolation_level=input_level) as tx:
results = await tx.query_raw(raw_queries.select_tx_isolation)

assert len(results) == 1

row = results[0]
assert any(row)

level = next(iter(row.values()))
# The result can depends on the database, so we do upper() and replace()
level = str(level).upper().replace(' ', '_').replace('-', '_')
assert level == expected_level
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@RobertCraigie I updated the tests and found here a bug in Prisma 😅

P.S. Look please at mypy (3.11) step why it doesn't pass.

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Oh wow, thanks for reporting that!

The mypy failure is unrelated to your PR, I'll look into fixing it.

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If you rebase against main, the mypy job should pass now.

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I'll update docs, then wait for a response from the Prisma team, and if bug will be confirmed, then PR will be ready to final review 🎉

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I'll update docs, then wait for a response from the Prisma team, and if bug will be confirmed, then PR will be ready to final review 🎉

Answer: prisma/prisma#22890 (comment)

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of course mysql doesn't even have a way to query that 🤦

I think it would be fine to just skip the tests for mysql if you haven't already.

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Sorry, I didn't know that...

It marked with skipif.

RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
This will be helpful for transaction isolation levels support

#878
RobertCraigie added a commit that referenced this pull request Feb 24, 2024
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Add support for interactive transactions with an isolation level
2 participants