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fix: nullable schemas for arrays/slices #527

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merged 1 commit into from
Jul 29, 2024

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lsdch
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@lsdch lsdch commented Jul 29, 2024

Hi, this is a small fix regarding the schema generation for array/slices.

Since json.Marshal yields null values for empty slices (see #457), this outcome should be explicit in the schema 🙂

Summary by CodeRabbit

  • New Features

    • Enhanced schema generation to allow nullable items within arrays.
    • Updated schema definitions to reflect arrays that can contain null values.
  • Bug Fixes

    • Improved test cases to ensure consistent handling of nullable array types in JSON schema definitions.

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coderabbitai bot commented Jul 29, 2024

Walkthrough

The recent changes enhance the schema generation logic by allowing array types to contain nullable items. This modification impacts how schemas handle data validation and serialization, ensuring that array elements can explicitly be null. Alongside this, the test cases have been updated to reflect the new schema expectations, improving the robustness and flexibility of data structure definitions.

Changes

Files Change Summary
schema.go, schema_test.go The schemaFromType function is updated to set s.Nullable to true for array types, allowing array items to be nullable. Correspondingly, test cases in schema_test.go are modified to reflect this by allowing schemas to accept both "array" and "null" as valid types.

Poem

🐇 In fields of code where bunnies hop,
We made our schemas twist and pop!
Arrays can now hold null with glee,
Flexibility, oh how sweet it’ll be!
So hop along, let data flow,
With every change, our schemas grow! 🌼


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codecov bot commented Jul 29, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.68%. Comparing base (4b6a508) to head (72a101d).

Additional details and impacted files
@@           Coverage Diff           @@
##             main     #527   +/-   ##
=======================================
  Coverage   92.68%   92.68%           
=======================================
  Files          22       22           
  Lines        3843     3844    +1     
=======================================
+ Hits         3562     3563    +1     
  Misses        236      236           
  Partials       45       45           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 4b6a508 and 72a101d.

Files selected for processing (2)
  • schema.go (1 hunks)
  • schema_test.go (10 hunks)
Additional comments not posted (9)
schema.go (1)

749-749: LGTM! But verify the function usage in the codebase.

The code changes are approved.

However, ensure that all function calls to schemaFromType correctly handle the new Nullable property for arrays.

schema_test.go (8)

207-207: LGTM!

The code changes are approved.


212-212: LGTM!

The code changes are approved.


288-288: LGTM!

The code changes are approved.


346-346: LGTM!

The code changes are approved.


436-436: LGTM!

The code changes are approved.


456-456: LGTM!

The code changes are approved.


747-747: LGTM!

The code changes are approved.


765-765: LGTM!

The code changes are approved.

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@danielgtaylor danielgtaylor left a comment

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LGTM, thanks!

Also worth mentioning: golang/go#37711 and the json/v2 effort linked there which would address some of this. For now at least the schema will match the behavior.

@danielgtaylor danielgtaylor merged commit 9eae273 into danielgtaylor:main Jul 29, 2024
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@jzillmann
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Doesn't it depend on the way the slices are initialized ?
Like emptySlice := []string{} will marshal into []...
For me it would be nice if there is a configuration switch with which I can steer this behavior. Having a generated typescript client this change is a big pain in the frontend while I haven't been suffering null slices before.

@lsdch
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lsdch commented Sep 9, 2024

Actually I recently ran into the same issue, also using a client generator. I agree that making this feature optional would be better.
@danielgtaylor I could submit a PR for this, just not sure where this option should belong. What do you think ?

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3 participants