yesodweb / yesodweb/persistent

Can't refer to the primary key in a Unique key

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#985 2 comments 2 reactions 0 assignees View on GitHub

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Dominant language
Haskell
Stars
486
Forks
306
PR merge metrics
No merged PRs in 30d

Description

Consider:

Group
  name Text

User
  Id String
  group GroupId

  UniqueUserGroup id group

This fails because the id column is unknown.

Contributor guide

Open the contributing guide

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

Reproduce the schema from the issue and trace how primary-key references are handled when validating a unique key. Add a regression test for the shown Group/User schema, and consider the issue done when the schema accepts id in UniqueUserGroup without reporting the column as unknown.

Written by the indexing model from the issue text.

Assessment

Tech stack
haskell
Domain
databases
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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