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41 lines
1.3 KiB
Markdown
41 lines
1.3 KiB
Markdown
# Migrating to v4.0
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This page covers every breaking change introduced in **v4.0** and the steps required to update your code.
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---
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## Database
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### `lock_tables` now takes a `session_maker` instead of a `session`
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The first argument of `lock_tables` changed from an `AsyncSession` instance to an `async_sessionmaker`.
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The function creates and manages its own **dedicated session** internally, yielding it to the caller.
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=== "Before (`v3`)"
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```python
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from fastapi_toolsets.db import lock_tables, LockMode
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async with lock_tables(session=session, tables=[User, Account]):
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user = await UserCrud.get(session, [User.id == 1])
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user.balance += 100
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# With a custom lock mode
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async with lock_tables(session=session, tables=[Order], mode=LockMode.EXCLUSIVE):
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await process_order(session, order_id)
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```
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=== "Now (`v4`)"
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```python
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from fastapi_toolsets.db import lock_tables, LockMode
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async with lock_tables(session_maker=session_maker, tables=[User, Account]) as session:
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user = await UserCrud.get(session, [User.id == 1])
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user.balance += 100
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# With a custom lock mode
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async with lock_tables(session_maker=session_maker, tables=[Order], mode=LockMode.EXCLUSIVE) as session:
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await process_order(session, order_id)
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```
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