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sgrif's profile
Miss Dada 🏳️‍⚧️
Miss Dada 🏳️‍⚧️
Miss Dada  🏳️‍⚧️
@sgrif

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Miss Dada  🏳️‍⚧️

@sgrif

Co lead of the http://crates.io  team. Creator of @dieselframework. Former host of @_bikeshed and @_yakshave. Former Rails comitter. Enby. they/them

Albuquerque, NM
patreon.com/seantheprogram…
Joined November 2008

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    1. please wear a mask‏ @mountain_ghosts 1 Oct 2019
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      Replying to @mountain_ghosts @samphippen

      my prior experience: - find_or_create does not work - rescuing RecordNotUnique - can deadlock mysql - behaves differently across mysql and postgres transaction semantics so you still need db-specific code e.g. savepoints

      1 reply 0 retweets 2 likes
    2. please wear a mask‏ @mountain_ghosts 1 Oct 2019
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      Replying to @mountain_ghosts @samphippen

      I know they added some alternate form of this, which is just broken in a different way (INSERT and then SELECT on failure), and an actual upsert API

      1 reply 0 retweets 0 likes
    3. Penelope literally has no balls‏ @penelope_zone 1 Oct 2019
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      Replying to @mountain_ghosts

      Hey @sgrif I'm sure you know about these things, would you care to weigh in?

      2 replies 0 retweets 0 likes
    4. Justin Searls‏Verified account @searls 1 Oct 2019
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      Replying to @penelope_zone @samphippen and

      Literally all I want is find_or_create_by to do an `on duplicate update` in postgres.

      1 reply 0 retweets 3 likes
    5. please wear a mask‏ @mountain_ghosts 1 Oct 2019
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      Replying to @searls @samphippen @sgrif

      "find or create" and "create or update" are different operations though

      1 reply 0 retweets 1 like
    6. Penelope literally has no balls‏ @penelope_zone 1 Oct 2019
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      Replying to @mountain_ghosts @searls @sgrif

      There’s also create or find by

      1 reply 0 retweets 0 likes
    7. please wear a mask‏ @mountain_ghosts 1 Oct 2019
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      Replying to @penelope_zone @samphippen and

      yeah I think that's the thing that does INSERT and then SELECT if that fails

      1 reply 0 retweets 0 likes
    8. Penelope literally has no balls‏ @penelope_zone 1 Oct 2019
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      Replying to @mountain_ghosts @searls @sgrif

      yup

      1 reply 0 retweets 0 likes
    9. Andrew White‏ @pixeltrix 1 Oct 2019
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      Replying to @penelope_zone @samphippen and

      That also has a race condition where a DELETE can occur between INSERT and SELECT

      1 reply 0 retweets 0 likes
      Miss Dada  🏳️‍⚧️‏ @sgrif 1 Oct 2019
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      Replying to @jashmatthews @pixeltrix and

      Miss Dada  🏳️‍⚧️ Retweeted Miss Dada  🏳️‍⚧️

      Jinxhttps://twitter.com/sgrif/status/1179025537139740672 …

      Miss Dada  🏳️‍⚧️ added,

      Miss Dada  🏳️‍⚧️ @sgrif
      Replying to @pixeltrix @samphippen and 2 others
      Yup, which is really the best you can do unless you're willing to change your application logic. Repeatable read isolation level (serializable on non-pg) + find_or_create_by is what folks want, but that requires being ready to handle serialization failures
      6:29 AM - 1 Oct 2019
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