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【Flutter】Because every version of flutter from sdk depends on・・・version solving failed.バージョンエラーが出たときにやったこと

Last updated at Posted at 2023-12-12

Flutterで新しくライブラリを入れてpub getしたときに以下のエラーが出たので、やったことを解説します

Because every version of flutter from sdk depends on meta 1.8.0 and riverpod >=2.3.10 <3.0.0-dev.0 depends on meta ^1.9.0, flutter from sdk is incompatible with riverpod >=2.3.10 <3.0.0-dev.0.
And because hooks_riverpod >=2.4.9 <3.0.0-dev.0 depends on riverpod 2.4.9, flutter from sdk is incompatible with hooks_riverpod >=2.4.9 <3.0.0-dev.0.
So, because household depends on both flutter from sdk and hooks_riverpod 2.4.9, version solving failed.
pub get failed
command: "/Users/nakayamatakahito/fvm/versions/3.7.1/bin/cache/dart-sdk/bin/dart __deprecated_pub --directory . get --example"
pub env: {
  "FLUTTER_ROOT": "/Users/nakayamatakahito/fvm/versions/3.7.1",
  "PUB_ENVIRONMENT": "flutter_cli:get",
  "PUB_CACHE": "/Users/nakayamatakahito/.pub-cache",
}
exit code: 1

原因

ライブラリのバージョンと現在のSDKのバージョンとの互換性がなくてエラーが出てるのが原因っぽい

dependencies:
  flutter:
    sdk: flutter
  hooks_riverpod: 2.4.9

hooks_riverpodを最新バージョンで入れてたんですが、これが問題のようです

解決策

互換性のあるバージョンに変えるためには、まずバージョンを削除した状態でpub getします

dependencies:
  flutter:
    sdk: flutter
  hooks_riverpod: 

そしてpubspec.lockを見ると、インストール可能なバージョンでインストールされています

pubspec.lock
hooks_riverpod:
    dependency: "direct main"
    description:
      name: hooks_riverpod
      sha256: "117edbe7e5cfc02e31a94f97e2acd4581f54bc37fcda9dce1f606f8ac851ba24"
      url: "https://pub.dev"
    source: hosted
    version: "2.3.7"

この2.3.7をpubspec.yamlに記述して完了です

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