示例

Show that typed generics `Set(...)` runs many-to-many association updates in 1.31.x where earlier behavior can silently ignore them.

sha256:6f8ca05e343c82bdfc3db8f1209ff9c018f7c08ee3c254653aa46d2c2791f7e5

案例

目标

Show that typed generics `Set(...)` runs many-to-many association updates in 1.31.x where earlier behavior can silently ignore them. HOW

包

gorm.io/gorm v1.31.2

环境

go

创建时间

2026-08-16T12:39:12Z

常见的想当然

When `gorm.G[T]` is used with `Set(...)` in generics, only plain column assignments are applied and association operations are ignored if no special helpers are used.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• assert that `gorm.G[User](db).Where("id = ?", user.ID).Set(clause.Association{Association:"Languages",Type:clause.OpUpdate,Set:...,Conditions:...}).Update(ctx)` mutates only the related `languages.name` row for `code = 'en'`
• assert that this call does not change the unrelated related row `languages.name` where `code = 'fr'`
• assert that this call returns `err == nil`
• assert that rows affected is `0` when `Set` only carries an association operation and no direct parent updates
• assert that the many-to-many join rows are preserved (`user_languages` row count stays 2), proving this is association-level mutation rather than parent row mutation

文件

• NOTES.md
• association_set_behavior_test.go
• csx.json
• go.mod
• go.sum

下载已验证的构件 (tar.gz) — 契约实际运行的那些字节

原始种子者

csx-seed

验证回执

• go 1.26 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-16 · ed25519:d91480838ac982c9