New Feature: Optional custom key_attr to that can be used instead of id (pk) in to access model in Django UD mutations (Issue #348)

[thepapermen]

Description

Types of Changes

• [ ] Core
• [ ] Bugfix
• [x] New feature
• [ ] Enhancement/optimization
• [x] Documentation

Issues Fixed or Closed by This PR

• 348

Checklist

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (fe450f3) 87.96% compared to head (49748bc) 87.46%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #387 +/- ## ========================================== - Coverage 87.96% 87.46% -0.50% ========================================== Files 33 35 +2 Lines 2983 3024 +41 ========================================== + Hits 2624 2645 +21 - Misses 359 379 +20 ``` | [Files](https://app.codecov.io/gh/strawberry-graphql/strawberry-graphql-django/pull/387?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=strawberry-graphql) | Coverage Δ | | |---|---|---| | [strawberry\_django/mutations/fields.py](https://app.codecov.io/gh/strawberry-graphql/strawberry-graphql-django/pull/387?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=strawberry-graphql#diff-c3RyYXdiZXJyeV9kamFuZ28vbXV0YXRpb25zL2ZpZWxkcy5weQ==) | `86.25% <100.00%> (+0.08%)` | :arrow_up: | | [strawberry\_django/mutations/mutations.py](https://app.codecov.io/gh/strawberry-graphql/strawberry-graphql-django/pull/387?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=strawberry-graphql#diff-c3RyYXdiZXJyeV9kamFuZ28vbXV0YXRpb25zL211dGF0aW9ucy5weQ==) | `92.85% <ø> (ø)` | | | [strawberry\_django/permissions.py](https://app.codecov.io/gh/strawberry-graphql/strawberry-graphql-django/pull/387?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=strawberry-graphql#diff-c3RyYXdiZXJyeV9kamFuZ28vcGVybWlzc2lvbnMucHk=) | `80.42% <100.00%> (+0.55%)` | :arrow_up: | ... and [3 files with indirect coverage changes](https://app.codecov.io/gh/strawberry-graphql/strawberry-graphql-django/pull/387/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=strawberry-graphql)

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[g-as]

Can this be extended to queries?

https://strawberry-graphql.github.io/strawberry-graphql-django/guide/queries/

[bellini666]

Can this be extended to queries?

https://strawberry-graphql.github.io/strawberry-graphql-django/guide/queries/

Yes, for sure!

Someone started to implement that for queries in this PR, but he will not be working on it anymore.

PRs (either a new one or a continuation of that existing one) are welcomed :)

[g-as]

Copy. I'll see what I can do. Thx