feat: unscoped association (#5899)

[black-06]

• Do only one thing
• Non breaking API changes
• Tested

What did this pull request do?

delete old records when Replace, Delete, Clear associations in Unscoped model.
Of course, permanent or soft deletion depends on DB.Unscoped.

See #5899

User Case Description

// Remove all reference between source & association, won’t delete those associations, set ForeignKey to nil
tx.Model(&item).Association("Contents").Clear()

// Soft delete
// UPDATE `item_contents` SET `deleted_at`= ...
tx.Model(&item).Association("Contents").Unscoped().Clear()

// Delete permanently
// DELETE FROM `item_contents` WHERE ...
tx.Unscoped().Model(&item).Association("Contents").Unscoped().Clear()

[black-06]

Did I do something wrong? The test failed.

SQLite: /home/runner/work/gorm/gorm/tests/associations_belongs_to_test.go:140 FOREIGN KEY constraint failed

MySQL: /home/runner/work/gorm/gorm/tests/associations_belongs_to_test.go:140 Error 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`gorm`.`users`, CONSTRAINT `fk_users_company` FOREIGN KEY (`company_id`) REFERENCES `companies` (`id`))

[a631807682]

I searched by --- FAIL keyword, did not see the error you said in CI.
sqlite related to go-gorm/sqlite#133

--- FAIL: TestSerializerZeroValue (0.01s)
    serializer_test.go:143: failed to query data, got error unsupported Scan, storing driver.Value type string into type *time.Time

mysql seems to be related to this PR, or an existing bug has been tested. If it is confirmed that it has nothing to do with PR, you can notify me to review.

--- FAIL: TestAssociationUnscoped (0.02s)
    associations_test.go:423: failed to create items, got error: Error 13[66](https://github.com/go-gorm/gorm/actions/runs/4731373972/jobs/8396215932?pr=6246#step:6:67) (HY000): Incorrect string value: '\xD8\xA7\xD9\x84\xD8\xA7...' for column 'name' at row 2

[black-06]

I searched by --- FAIL keyword, did not see the error you said in CI. sqlite related to go-gorm/sqlite#133

--- FAIL: TestSerializerZeroValue (0.01s)
    serializer_test.go:143: failed to query data, got error unsupported Scan, storing driver.Value type string into type *time.Time

mysql seems to be related to this PR, or an existing bug has been tested.

--- FAIL: TestAssociationUnscoped (0.02s)
    associations_test.go:423: failed to create items, got error: Error 13[66](https://github.com/go-gorm/gorm/actions/runs/4731373972/jobs/8396215932?pr=6246#step:6:67) (HY000): Incorrect string value: '\xD8\xA7\xD9\x84\xD8\xA7...' for column 'name' at row 2

Got it.

[black-06]

Before this pr, we need to merge #6250 first (for SQLite test)

And #6127 (comment) (for MySQL test)
(Do I modify it directly in #6250? Or another pr?)

[black-06]

By the way, how should I notify you @a631807682 .

Assignees
No one assigned

I don't use GitHub very well.

[a631807682]

Both ok, because it's all about fixing unit tests.
Comment or update the code on an issue or PR I've commented on and I'll be notified, or just @ me