metabase / metabase/toucan

No implementation of method: :post-insert of protocol: #'toucan.models/IModel found for class: nil

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#77 2 comments 2 reactions 0 assignees View on GitHub

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Dominant language
Clojure
Stars
576
Forks
48
PR merge metrics
No merged PRs in 30d

Description

  • @camsaul

based on https://github.com/metabase/metabase/issues/6295 and my own experience trying to get Metabase to connect to a pgpool-managed Postgresql cluster, it seems like there is a problem with how Toucan builds SQL queries, which leads to the above error when such queries are executed against pgpool.

Maybe Toucan is trying to leverage a feature of Postgres that pgpool doesn't support?

Or perhaps Toucan is working correctly but Metabase is not implementing it right?

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No source files, tests, or entry points are identified in the issue. Start by reproducing the reported error with Toucan and a pgpool-managed PostgreSQL cluster, then compare it with Metabase issue 6295; done means identifying whether Toucan or Metabase causes the unsupported query behavior and documenting a verified fix.

Written by the indexing model from the issue text.

Assessment

Tech stack
clojure, postgresql
Domain
databases
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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