yesodweb/persistent

Support `constraint=` syntax on postgresql and sqlite backends

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#939 opened on Aug 5, 2019

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PostgresSqliteenhancementgood first issue

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Description

#937 introduced constraint= syntax to the persistent quasiquoter and added support for persistent-mysql. This should also be added to persistent-postgresql and persistent-sqlite.

Contributor guide

Research direction
Study the implementation of `constraint=` in persistent mysql, then replicate the same support in persistent postgresql and persistent sqlite, including parser changes and backend specific SQL generation.
Tech stack
haskell
Domain
backenddatabase
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
HaskellGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50