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Pessimistic locking: select for update #932

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Abdelhadi92 opened this issue Feb 25, 2024 · 3 comments · Fixed by #1085
Closed

Pessimistic locking: select for update #932

Abdelhadi92 opened this issue Feb 25, 2024 · 3 comments · Fixed by #1085

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@Abdelhadi92
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I need to lock an object in the database in order to prevent other transactions from modifying the same record. Within the Postgres such a lock should be done using the SELECT FOR UPDATE query.

How I can do this using Piccolo?

you can find it out in Django here and in Pony here

@Abdelhadi92 Abdelhadi92 changed the title Pessimistic locking Pessimistic locking: select for update Feb 25, 2024
@dantownsend
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It's not currently possible, but I think it would be pretty simple to add.

We could add something like a lock_strength argument to the select method.

https://www.postgresql.org/docs/current/sql-select.html#SQL-FOR-UPDATE-SHARE

await MyTable.select(lock_strength='UPDATE')

I'm not certain on the best API for it yet, but something like that should work.

@deliro
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deliro commented May 20, 2024

I guess this one is an absolute must have. Any updates on it?

@dantownsend
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Implemented by #1085

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3 participants