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Resolves AppVersion context-level conflict after migrating from Core Data model v10

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This commit is contained in:
Riley Testut
2022-09-13 15:31:14 -07:00
committed by Joseph Mattello
parent a64435f155
commit 8ad7be474d
1 changed files with 12 additions and 0 deletions
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12
AltStoreCore/Model/MergePolicy.swift
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@@ -39,6 +39,18 @@ open class MergePolicy: RSTRelationshipPreservingMergePolicy
}
}
case is AppVersion where conflict.conflictingObjects.count == 2:
// Occurs first time fetching sources after migrating from pre-AppVersion database model.
let conflictingAppVersions = conflict.conflictingObjects.lazy.compactMap { $0 as? AppVersion }
// Primary AppVersion == AppVersion whose latestVersionApp.latestVersion points back to itself.
if let primaryAppVersion = conflictingAppVersions.first(where: { $0.latestVersionApp?.latestVersion == $0 }),
let secondaryAppVersion = conflictingAppVersions.first(where: { $0 != primaryAppVersion })
{
secondaryAppVersion.managedObjectContext?.delete(secondaryAppVersion)
print("[ALTLog] Resolving AppVersion context-level conflict. Most likely due to migrating from pre-AppVersion model version.", primaryAppVersion)
}
default:
// Unknown context-level conflict.
assertionFailure("MergePolicy is only intended to work with database-level conflicts.")