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migrations: Map non-existant external users to Ghost

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When performing migrations, and need to remap external users to local
ones, when no local mapping is possible, map the external user to Ghost,
rather than the user who initiated the migration.

Mapping the external user to the migration initiator has the potential
of breaking assumptions elsewhere, like only having one review per pull
request per user. Mapping these migrated, locally unavailable users to
Ghost makes sure these - often hidden - assumptions do not break.

Fixes #3860.

Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
This commit is contained in:
Gergely Nagy 2024-05-28 12:40:11 +02:00
parent 95ccbb5995
commit ade7304eea
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3 changed files with 8 additions and 7 deletions
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1
release-notes/8.0.0/fix/3935.md Normal file
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@ -0,0 +1 @@
- Fixed an issue where migrated activities (such as reviews) were mapped to the user who initiated the migration rather than the Ghost user, if the external user could not be mapped to a local one. This mapping mismatch led to internal server errors in some cases (forgejo/forgejo#3860).

2
services/migrations/gitea_uploader.go
View file

@ -996,7 +996,7 @@ func (g *GiteaLocalUploader) remapUser(source user_model.ExternalUserMigrated, t
if userID > 0 {
return target.RemapExternalUser("", 0, userID)
}
return target.RemapExternalUser(source.GetExternalName(), source.GetExternalID(), g.doer.ID)
return target.RemapExternalUser(source.GetExternalName(), source.GetExternalID(), user_model.GhostUserID)
}
func (g *GiteaLocalUploader) remapLocalUser(source user_model.ExternalUserMigrated) (int64, error) {

12
services/migrations/gitea_uploader_test.go
View file

@ -145,24 +145,24 @@ func TestGiteaUploadRemapLocalUser(t *testing.T) {
//
// The externalID does not match any existing user, everything
// belongs to the doer
// belongs to the Ghost user
//
target := repo_model.Release{}
uploader.userMap = make(map[int64]int64)
err := uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, doer.ID, target.GetUserID())
assert.EqualValues(t, user_model.GhostUserID, target.GetUserID())
//
// The externalID matches a known user but the name does not match,
// everything belongs to the doer
// everything belongs to the Ghost user
//
source.PublisherID = user.ID
target = repo_model.Release{}
uploader.userMap = make(map[int64]int64)
err = uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, doer.ID, target.GetUserID())
assert.EqualValues(t, user_model.GhostUserID, target.GetUserID())
//
// The externalID and externalName match an existing user, everything
@ -195,13 +195,13 @@ func TestGiteaUploadRemapExternalUser(t *testing.T) {
//
// When there is no user linked to the external ID, the migrated data is authored
// by the doer
// by the Ghost user
//
uploader.userMap = make(map[int64]int64)
target := repo_model.Release{}
err := uploader.remapUser(&source, &target)
assert.NoError(t, err)
assert.EqualValues(t, doer.ID, target.GetUserID())
assert.EqualValues(t, user_model.GhostUserID, target.GetUserID())
//
// Link the external ID to an existing user