<!--
{
  "availability" : [
    "iOS: 17.0.0 -",
    "iPadOS: 17.0.0 -",
    "macCatalyst: 17.0.0 -",
    "macOS: 14.0.0 -",
    "swift: 5.9.0 -",
    "tvOS: 17.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 10.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "SwiftData",
  "identifier" : "/documentation/SwiftData/MigrationStage/lightweight(fromVersion:toVersion:)",
  "metadataVersion" : "0.1.0",
  "role" : "Case",
  "symbol" : {
    "kind" : "Case",
    "modules" : [
      "SwiftData"
    ],
    "preciseIdentifier" : "s:9SwiftData14MigrationStageO11lightweightyAcA15VersionedSchema_pXp_AaE_pXptcACmF"
  },
  "title" : "MigrationStage.lightweight(fromVersion:toVersion:)"
}
-->

# MigrationStage.lightweight(fromVersion:toVersion:)

```
case lightweight(fromVersion: any VersionedSchema.Type, toVersion: any VersionedSchema.Type)
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)