{"id":3522,"date":"2024-05-28T23:49:24","date_gmt":"2024-05-28T20:49:24","guid":{"rendered":"https:\/\/demensdeum.com\/blog\/?p=3522"},"modified":"2024-12-16T22:32:13","modified_gmt":"2024-12-16T19:32:13","slug":"crud-repository","status":"publish","type":"post","link":"https:\/\/demensdeum.com\/blog\/ja\/2024\/05\/28\/crud-repository\/","title":{"rendered":"CRUD\u30ea\u30dd\u30b8\u30c8\u30ea"},"content":{"rendered":"

\u3053\u306e\u30ce\u30fc\u30c8\u3067\u306f\u3001\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u308b\u53e4\u5178\u7684\u306a CRUD \u30d1\u30bf\u30fc\u30f3\u3001Swift \u8a00\u8a9e\u3067\u306e\u5b9f\u88c5\u306e\u57fa\u672c\u539f\u5247\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 Swift \u306f\u3001Windows\u3001Linux\u3001macOS\u3001iOS\u3001Android \u3067\u5229\u7528\u3067\u304d\u308b\u30aa\u30fc\u30d7\u30f3\u306a\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u8a00\u8a9e\u3067\u3059\u3002<\/p>\n

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1 \u5e74\u5f8c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f BueMS \u3067\u66f8\u304d\u76f4\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u7a81\u7136\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u958b\u767a\u8005\u304c\u6709\u6599\u5316\u3092\u6c7a\u5b9a\u3057\u307e\u3057\u305f\u3002\u30c1\u30fc\u30e0\u306f\u540c\u3058\u7f60\u306b 2 \u5ea6\u9665\u3063\u305f\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u30022 \u5ea6\u76ee\u304b\u3089\u629c\u3051\u51fa\u305b\u308b\u304b\u3069\u3046\u304b\u306f\u307e\u3063\u305f\u304f\u5225\u306e\u8a71\u3067\u3059\u3002<\/p>\n

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\u7c21\u7565\u5316\u3055\u308c\u305f UML CRUD \u56f3\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\"\"<\/p>\n

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\"\"<\/p>\n

\u5b9f\u969b\u306e SQLite \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f8b:<\/p>\n

\"\"<\/p>\n

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UserDefaults \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u76f4\u63a5\u64cd\u4f5c\u3059\u308b\u3001Book \u69cb\u9020\u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u975e\u5e38\u306b\u5178\u578b\u7684\u306a Swift \u30b3\u30fc\u30c9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\n
\n
\nstruct Book: Codable {\n\tlet title: String\n\tlet author: String\n}\n\nclass BookRepository {\n\tfunc save(book: Book) {\n    \t\tlet record = try! JSONEncoder().encode(book)\n    \t\tUserDefaults.standard.set(record, forKey: book.title)\n\t}\n    \n\tfunc get(bookWithTitle title: String) -> Book? {\n    \t\tguard let data = UserDefaults.standard.data(forKey: title) else { return nil }\n    \t\tlet book = try! JSONDecoder().decode(Book.self, from: data)\n    \t\treturn book\n\t}\n    \n\tfunc delete(book: Book) {\n    \t\tUserDefaults.standard.removeObject(forKey: book.title)\n\t}\n}\n\nlet book = Book(title: \"Fear and Loathing in COBOL\", author: \"Sir Edsger ZX Spectrum\")\nlet repository = BookRepository()\nrepository.save(book: book)\nprint(repository.get(bookWithTitle: book.title)!)\nrepository.delete(book: book)\nguard repository.get(bookWithTitle: book.title) == nil else {\n\tprint(\"Error: can't delete Book from repository!\")\n\texit(1)\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306f\u5358\u7d14\u306b\u898b\u3048\u307e\u3059\u304c\u3001DRY (Do notrepeat Yourself) \u539f\u5247\u306e\u9055\u53cd\u306e\u6570\u3068\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u3092\u6570\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002
UserDefaults \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u63a5\u7d9a
JSON \u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u304a\u3088\u3073\u30c7\u30b3\u30fc\u30c0\u30fc\u3068\u306e\u63a5\u7d9a – #8211; JSON\u30a8\u30f3\u30b3\u30fc\u30c0\u3001JSON\u30c7\u30b3\u30fc\u30c0
Book \u69cb\u9020\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u69cb\u9020\u3054\u3068\u306b\u30ea\u30dd\u30b8\u30c8\u30ea \u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u306a\u3044\u3088\u3046\u306b\u62bd\u8c61\u30ea\u30dd\u30b8\u30c8\u30ea\u304c\u5fc5\u8981\u3067\u3059 (DRY \u9055\u53cd)<\/p>\n
\u3053\u306e\u7a2e\u306e CRUD \u30ea\u30dd\u30b8\u30c8\u30ea \u30b3\u30fc\u30c9\u306f\u3088\u304f\u898b\u304b\u3051\u307e\u3059\u3002\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u30b3\u30fc\u30c9\u306e\u9ad8\u5ea6\u306a\u7d50\u5408\u3068\u91cd\u8907\u306b\u3088\u308a\u3001\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u305d\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u975e\u5e38\u306b\u8907\u96d1\u306b\u306a\u308b\u3068\u3044\u3046\u4e8b\u5b9f\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5225\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5207\u308a\u66ff\u3048\u3088\u3046\u3068\u3059\u308b\u5834\u5408\u3001\u307e\u305f\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f5c\u6210\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u64cd\u4f5c\u3059\u308b\u5185\u90e8\u30ed\u30b8\u30c3\u30af\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u306b\u7279\u306b\u9855\u8457\u306b\u306a\u308a\u307e\u3059\u3002
\u30b3\u30fc\u30c9\u3092\u8907\u88fd\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u30ab\u30c3\u30d7\u30ea\u30f3\u30b0\u3092\u9ad8\u304f\u4fdd\u3061\u307e\u3059\u3002 CRUD \u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f5c\u6210\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 \u30d3\u30b8\u30cd\u30b9 \u30ed\u30b8\u30c3\u30af\u3092\u62bd\u8c61\u5316\u3057\u3001DRY \u3092\u5c0a\u91cd\u3057\u3001\u4f4e\u7d50\u5408\u3092\u5b9f\u88c5\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
\n
    typealias Item = Codable\n    typealias ItemIdentifier = String\n    \n    func create<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws\n    func read<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier) async throws -> T\n    func update<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws\n    func delete(id: CRUDRepository.ItemIdentifier) async throws\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
CRUDRepository \u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u7279\u5b9a\u306e CRUD \u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u3055\u3089\u306b\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3068\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\u6b21\u306b\u3001UserDefaults \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u7279\u5b9a\u306e\u5b9f\u88c5\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
\n
\n
    private typealias RecordIdentifier = String\n    \n    let tableName: String\n    let dataTransformer: DataTransformer\n    \n    init(\n   \t tableName: String = \"\",\n   \t dataTransformer: DataTransformer = JSONDataTransformer()\n    ) {\n   \t self.tableName = tableName\n   \t self.dataTransformer = dataTransformer\n    }\n    \n    private func key(id: CRUDRepository.ItemIdentifier) -> RecordIdentifier {\n   \t \"database_\\(tableName)_item_\\(id)\"\n    }\n   \t \n    private func isExists(id: CRUDRepository.ItemIdentifier) async throws -> Bool {\n   \t UserDefaults.standard.data(forKey: key(id: id)) != nil\n    }\n    \n    func create<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws {\n   \t let data = try await dataTransformer.encode(item)\n   \t UserDefaults.standard.set(data, forKey: key(id: id))\n   \t UserDefaults.standard.synchronize()\n    }\n    \n    func read<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier) async throws -> T {\n   \t guard let data = UserDefaults.standard.data(forKey: key(id: id)) else {\n   \t\t throw CRUDRepositoryError.recordNotFound(id: id)\n   \t }\n   \t let item: T = try await dataTransformer.decode(data: data)\n   \t return item\n    }\n    \n    func update<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws {\n   \t guard try await isExists(id: id) else {\n   \t\t throw CRUDRepositoryError.recordNotFound(id: id)\n   \t }\n   \t let data = try await dataTransformer.encode(item)\n   \t UserDefaults.standard.set(data, forKey: key(id: id))\n   \t UserDefaults.standard.synchronize()\n    }\n    \n    func delete(id: CRUDRepository.ItemIdentifier) async throws {\n   \t guard try await isExists(id: id) else {\n   \t\t throw CRUDRepositoryError.recordNotFound(id: id)\n   \t }\n   \t UserDefaults.standard.removeObject(forKey: key(id: id))\n   \t UserDefaults.standard.synchronize()\n    }\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u30b3\u30fc\u30c9\u306f\u9577\u304f\u898b\u3048\u307e\u3059\u304c\u3001\u758e\u7d50\u5408\u3092\u542b\u3080 CRUD \u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u5b8c\u5168\u306a\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u8a73\u7d30\u306f\u4ee5\u4e0b\u3067\u8aac\u660e\u3057\u307e\u3059\u3002
\u30b3\u30fc\u30c9\u306e\u81ea\u5df1\u6587\u66f8\u5316\u306e\u305f\u3081\u306b typealias \u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002
\u5f31\u3044\u7d50\u5408\u3068\u5f37\u3044\u7d50\u5408
 \u306b\u3064\u3044\u3066\u3002\u7279\u5b9a\u306e\u69cb\u9020 (struct) \u304b\u3089\u306e\u5207\u308a\u96e2\u3057\u306f\u3001\u6c4e\u7528 T \u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001Codable \u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 Codable \u3067\u306f\u3001TopLevelEncoder \u304a\u3088\u3073 TopLevelDecoder \u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u30af\u30e9\u30b9 (JSONEncoder \u3084 JSONDecoder \u306a\u3069) \u3092\u4f7f\u7528\u3057\u3066\u69cb\u9020\u3092\u5909\u63db\u3067\u304d\u307e\u3059\u3002\u57fa\u672c\u578b (Int\u3001String\u3001Float \u306a\u3069) \u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u69cb\u9020\u3092\u5909\u63db\u3059\u308b\u305f\u3081\u306b\u8ffd\u52a0\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002 p><\/p>\n
\u7279\u5b9a\u306e\u30a8\u30f3\u30b3\u30fc\u30c0\u3068\u30c7\u30b3\u30fc\u30c0\u304b\u3089\u306e\u5206\u96e2\u306f\u3001DataTransformer \u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u62bd\u8c61\u5316\u3092\u4f7f\u7528\u3057\u3066\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n
\n
\n
\tfunc encode<T: Encodable>(_ object: T) async throws -> Data\n\tfunc decode<T: Decodable>(data: Data) async throws -> T\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u30c7\u30fc\u30bf \u30c8\u30e9\u30f3\u30b9\u30d5\u30a9\u30fc\u30de\u30fc\u306e\u5b9f\u88c5\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3068\u30c7\u30b3\u30fc\u30c0\u30fc\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u62bd\u8c61\u5316\u3092\u5b9f\u88c5\u3057\u3001\u3055\u307e\u3056\u307e\u306a\u30bf\u30a4\u30d7\u306e\u30c7\u30fc\u30bf\u5f62\u5f0f\u3067\u78ba\u5b9f\u306b\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u758e\u7d50\u5408\u3092\u5b9f\u88c5\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u4ee5\u4e0b\u306f\u3001\u7279\u5b9a\u306e DataTransformer\u3001\u3064\u307e\u308a JSON \u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n
\n
\n
\tfunc encode<T>(_ object: T) async throws -> Data where T : Encodable {\n    \t\tlet data = try JSONEncoder().encode(object)\n    \t\treturn data\n\t}\n    \n\tfunc decode<T>(data: Data) async throws -> T where T : Decodable {\n    \t\tlet item: T = try JSONDecoder().decode(T.self, from: data)\n    \t\treturn item\n\t}\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u305d\u308c\u306f\u53ef\u80fd\u3067\u3057\u305f\u304b\uff1f<\/p>\n
\u4f55\u304c\u5909\u308f\u308a\u307e\u3057\u305f\u304b?\u4eca\u5f8c\u306f\u3001Codable \u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u69cb\u9020\u3092\u64cd\u4f5c\u3067\u304d\u308b\u3088\u3046\u306b\u7279\u5b9a\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u521d\u671f\u5316\u3059\u308b\u3060\u3051\u3067\u5341\u5206\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30b3\u30fc\u30c9\u3092\u8907\u88fd\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u758e\u7d50\u5408\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u7279\u5b9a\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u4f7f\u7528\u3057\u305f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 CRUD \u306e\u4f8b\u3002UserDefaults \u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001JSON \u30c7\u30fc\u30bf\u5f62\u5f0f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u69cb\u9020\u3067\u3042\u308a\u3001\u914d\u5217\u306e\u66f8\u304d\u8fbc\u307f\u3068\u8aad\u307f\u53d6\u308a\u306e\u4f8b\u3067\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
\n
\n
\nprint(\"One item access example\")\n\ndo {\n\tlet clientRecordIdentifier = \"client\"\n\tlet clientOne = Client(name: \"Chill Client\")\n\tlet repository = UserDefaultsRepository(\n    \ttableName: \"Clients Database\",\n    \tdataTransformer: JSONDataTransformer()\n\t)\n\ttry await repository.create(id: clientRecordIdentifier, item: clientOne)\n\tvar clientRecord: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(\"Client Name: \\(clientRecord.name)\")\n\tclientRecord.name = \"Busy Client\"\n\ttry await repository.update(id: clientRecordIdentifier, item: clientRecord)\n\tlet updatedClient: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(\"Updated Client Name: \\(updatedClient.name)\")\n\ttry await repository.delete(id: clientRecordIdentifier)\n\tlet removedClientRecord: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(removedClientRecord)\n}\ncatch {\n\tprint(error.localizedDescription)\n}\n\nprint(\"Array access example\")\n\nlet clientArrayRecordIdentifier = \"clientArray\"\nlet clientOne = Client(name: \"Chill Client\")\nlet repository = UserDefaultsRepository(\n\ttableName: \"Clients Database\",\n\tdataTransformer: JSONDataTransformer()\n)\nlet array = [clientOne]\ntry await repository.create(id: clientArrayRecordIdentifier, item: array)\nlet savedArray: [Client] = try await repository.read(id: clientArrayRecordIdentifier)\nprint(savedArray.first!)\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u6700\u521d\u306e CRUD \u30c1\u30a7\u30c3\u30af\u4e2d\u306b\u4f8b\u5916\u51e6\u7406\u304c\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u30ea\u30e2\u30fc\u30c8 \u30a2\u30a4\u30c6\u30e0\u306e\u8aad\u307f\u53d6\u308a\u306f\u5229\u7528\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5207\u308a\u66ff\u3048<\/p>\n
\u6b21\u306b\u3001\u73fe\u5728\u306e\u30b3\u30fc\u30c9\u3092\u5225\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u8ee2\u9001\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001ChatGPT \u304c\u751f\u6210\u3057\u305f SQLite \u30ea\u30dd\u30b8\u30c8\u30ea \u30b3\u30fc\u30c9\u3092\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002<\/p>\n
\n
\n
\nclass SQLiteRepository: CRUDRepository {\n    private typealias RecordIdentifier = String\n    \n    let tableName: String\n    let dataTransformer: DataTransformer\n    private var db: OpaquePointer?\n\n    init(\n   \t tableName: String,\n   \t dataTransformer: DataTransformer = JSONDataTransformer()\n    ) {\n   \t self.tableName = tableName\n   \t self.dataTransformer = dataTransformer\n   \t self.db = openDatabase()\n   \t createTableIfNeeded()\n    }\n    \n    private func openDatabase() -> OpaquePointer? {\n   \t var db: OpaquePointer? = nil\n   \t let fileURL = try! FileManager.default\n   \t\t .url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)\n   \t\t .appendingPathComponent(\"\\(tableName).sqlite\")\n   \t if sqlite3_open(fileURL.path, &db) != SQLITE_OK {\n   \t\t print(\"error opening database\")\n   \t\t return nil\n   \t }\n   \t return db\n    }\n    \n    private func createTableIfNeeded() {\n   \t let createTableString = \"\"\"\n   \t CREATE TABLE IF NOT EXISTS \\(tableName) (\n   \t id TEXT PRIMARY KEY NOT NULL,\n   \t data BLOB NOT NULL\n   \t );\n   \t \"\"\"\n   \t var createTableStatement: OpaquePointer? = nil\n   \t if sqlite3_prepare_v2(db, createTableString, -1, &createTableStatement, nil) == SQLITE_OK {\n   \t\t if sqlite3_step(createTableStatement) == SQLITE_DONE {\n       \t\t print(\"\\(tableName) table created.\")\n   \t\t } else {\n       \t\t print(\"\\(tableName) table could not be created.\")\n   \t\t }\n   \t } else {\n   \t\t print(\"CREATE TABLE statement could not be prepared.\")\n   \t }\n   \t sqlite3_finalize(createTableStatement)\n    }\n    \n    private func isExists(id: CRUDRepository.ItemIdentifier) async throws -> Bool {\n   \t let queryStatementString = \"SELECT data FROM \\(tableName) WHERE id = ?;\"\n   \t var queryStatement: OpaquePointer? = nil\n   \t if sqlite3_prepare_v2(db, queryStatementString, -1, &queryStatement, nil) == SQLITE_OK {\n   \t\t sqlite3_bind_text(queryStatement, 1, id, -1, nil)\n   \t\t if sqlite3_step(queryStatement) == SQLITE_ROW {\n       \t\t sqlite3_finalize(queryStatement)\n       \t\t return true\n   \t\t } else {\n       \t\t sqlite3_finalize(queryStatement)\n       \t\t return false\n   \t\t }\n   \t } else {\n   \t\t print(\"SELECT statement could not be prepared.\")\n   \t\t throw CRUDRepositoryError.databaseError\n   \t }\n    }\n    \n    func create<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws {\n   \t let insertStatementString = \"INSERT INTO \\(tableName) (id, data) VALUES (?, ?);\"\n   \t var insertStatement: OpaquePointer? = nil\n   \t if sqlite3_prepare_v2(db, insertStatementString, -1, &insertStatement, nil) == SQLITE_OK {\n   \t\t let data = try await dataTransformer.encode(item)\n   \t\t sqlite3_bind_text(insertStatement, 1, id, -1, nil)\n   \t\t sqlite3_bind_blob(insertStatement, 2, (data as NSData).bytes, Int32(data.count), nil)\n   \t\t if sqlite3_step(insertStatement) == SQLITE_DONE {\n       \t\t print(\"Successfully inserted row.\")\n   \t\t } else {\n       \t\t print(\"Could not insert row.\")\n       \t\t throw CRUDRepositoryError.databaseError\n   \t\t }\n   \t } else {\n   \t\t print(\"INSERT statement could not be prepared.\")\n   \t\t throw CRUDRepositoryError.databaseError\n   \t }\n   \t sqlite3_finalize(insertStatement)\n    }\n    \n    func read<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier) async throws -> T {\n   \t let queryStatementString = \"SELECT data FROM \\(tableName) WHERE id = ?;\"\n   \t var queryStatement: OpaquePointer? = nil\n   \t var item: T?\n   \t if sqlite3_prepare_v2(db, queryStatementString, -1, &queryStatement, nil) == SQLITE_OK {\n   \t\t sqlite3_bind_text(queryStatement, 1, id, -1, nil)\n   \t\t if sqlite3_step(queryStatement) == SQLITE_ROW {\n       \t\t let queryResultCol1 = sqlite3_column_blob(queryStatement, 0)\n       \t\t let queryResultCol1Length = sqlite3_column_bytes(queryStatement, 0)\n       \t\t let data = Data(bytes: queryResultCol1, count: Int(queryResultCol1Length))\n       \t\t item = try await dataTransformer.decode(data: data)\n   \t\t } else {\n       \t\t throw CRUDRepositoryError.recordNotFound(id: id)\n   \t\t }\n   \t } else {\n   \t\t print(\"SELECT statement could not be prepared\")\n   \t\t throw CRUDRepositoryError.databaseError\n   \t }\n   \t sqlite3_finalize(queryStatement)\n   \t return item!\n    }\n    \n    func update<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws {\n   \t guard try await isExists(id: id) else {\n   \t\t throw CRUDRepositoryError.recordNotFound(id: id)\n   \t }\n   \t let updateStatementString = \"UPDATE \\(tableName) SET data = ? WHERE id = ?;\"\n   \t var updateStatement: OpaquePointer? = nil\n   \t if sqlite3_prepare_v2(db, updateStatementString, -1, &updateStatement, nil) == SQLITE_OK {\n   \t\t let data = try await dataTransformer.encode(item)\n   \t\t sqlite3_bind_blob(updateStatement, 1, (data as NSData).bytes, Int32(data.count), nil)\n   \t\t sqlite3_bind_text(updateStatement, 2, id, -1, nil)\n   \t\t if sqlite3_step(updateStatement) == SQLITE_DONE {\n       \t\t print(\"Successfully updated row.\")\n   \t\t } else {\n       \t\t print(\"Could not update row.\")\n       \t\t throw CRUDRepositoryError.databaseError\n   \t\t }\n   \t } else {\n   \t\t print(\"UPDATE statement could not be prepared.\")\n   \t\t throw CRUDRepositoryError.databaseError\n   \t }\n   \t sqlite3_finalize(updateStatement)\n    }\n    \n    func delete(id: CRUDRepository.ItemIdentifier) async throws {\n   \t guard try await isExists(id: id) else {\n   \t\t throw CRUDRepositoryError.recordNotFound(id: id)\n   \t }\n   \t let deleteStatementString = \"DELETE FROM \\(tableName) WHERE id = ?;\"\n   \t var deleteStatement: OpaquePointer? = nil\n   \t if sqlite3_prepare_v2(db, deleteStatementString, -1, &deleteStatement, nil) == SQLITE_OK {\n   \t\t sqlite3_bind_text(deleteStatement, 1, id, -1, nil)\n   \t\t if sqlite3_step(deleteStatement) == SQLITE_DONE {\n       \t\t print(\"Successfully deleted row.\")\n   \t\t } else {\n       \t\t print(\"Could not delete row.\")\n       \t\t throw CRUDRepositoryError.databaseError\n   \t\t }\n   \t } else {\n   \t\t print(\"DELETE statement could not be prepared.\")\n   \t\t throw CRUDRepositoryError.databaseError\n   \t }\n   \t sqlite3_finalize(deleteStatement)\n    }\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u307e\u305f\u306f\u3001\u540c\u3058\u304f ChatGPT \u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u305f\u3001\u30d5\u30a1\u30a4\u30eb \u30b7\u30b9\u30c6\u30e0\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u306e CRUD \u30b3\u30fc\u30c9:<\/p>\n
\n
\n
\nclass FileSystemRepository: CRUDRepository {\n\tprivate typealias RecordIdentifier = String\n    \n\tlet directoryName: String\n\tlet dataTransformer: DataTransformer\n\tprivate let fileManager = FileManager.default\n\tprivate var directoryURL: URL\n    \n\tinit(\n    \tdirectoryName: String = \"Database\",\n    \tdataTransformer: DataTransformer = JSONDataTransformer()\n\t) {\n    \tself.directoryName = directoryName\n    \tself.dataTransformer = dataTransformer\n   \t \n    \tlet paths = fileManager.urls(for: .documentDirectory, in: .userDomainMask)\n    \tdirectoryURL = paths.first!.appendingPathComponent(directoryName)\n   \t \n    \tif !fileManager.fileExists(atPath: directoryURL.path) {\n        \ttry? fileManager.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)\n    \t}\n\t}\n    \n\tprivate func fileURL(id: CRUDRepository.ItemIdentifier) -> URL {\n    \treturn directoryURL.appendingPathComponent(\"item_\\(id).json\")\n\t}\n    \n\tprivate func isExists(id: CRUDRepository.ItemIdentifier) async throws -> Bool {\n    \treturn fileManager.fileExists(atPath: fileURL(id: id).path)\n\t}\n    \n\tfunc create<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws {\n    \tlet data = try await dataTransformer.encode(item)\n    \tlet url = fileURL(id: id)\n    \ttry data.write(to: url)\n\t}\n    \n\tfunc read<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier) async throws -> T {\n    \tlet url = fileURL(id: id)\n    \tguard let data = fileManager.contents(atPath: url.path) else {\n        \tthrow CRUDRepositoryError.recordNotFound(id: id)\n    \t}\n    \tlet item: T = try await dataTransformer.decode(data: data)\n    \treturn item\n\t}\n    \n\tfunc update<T: CRUDRepository.Item>(id: CRUDRepository.ItemIdentifier, item: T) async throws {\n    \tguard try await isExists(id: id) else {\n        \tthrow CRUDRepositoryError.recordNotFound(id: id)\n    \t}\n    \tlet data = try await dataTransformer.encode(item)\n    \tlet url = fileURL(id: id)\n    \ttry data.write(to: url)\n\t}\n    \n\tfunc delete(id: CRUDRepository.ItemIdentifier) async throws {\n    \tguard try await isExists(id: id) else {\n        \tthrow CRUDRepositoryError.recordNotFound(id: id)\n    \t}\n    \tlet url = fileURL(id: id)\n    \ttry fileManager.removeItem(at: url)\n\t}\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30b3\u30fc\u30c9\u5185\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n
\n
\n
\nprint(\"One item access example\")\n\ndo {\n\tlet clientRecordIdentifier = \"client\"\n\tlet clientOne = Client(name: \"Chill Client\")\n\tlet repository = FileSystemRepository(\n    \tdirectoryName: \"Clients Database\",\n    \tdataTransformer: JSONDataTransformer()\n\t)\n\ttry await repository.create(id: clientRecordIdentifier, item: clientOne)\n\tvar clientRecord: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(\"Client Name: \\(clientRecord.name)\")\n\tclientRecord.name = \"Busy Client\"\n\ttry await repository.update(id: clientRecordIdentifier, item: clientRecord)\n\tlet updatedClient: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(\"Updated Client Name: \\(updatedClient.name)\")\n\ttry await repository.delete(id: clientRecordIdentifier)\n\tlet removedClientRecord: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(removedClientRecord)\n}\ncatch {\n\tprint(error.localizedDescription)\n}\n\nprint(\"Array access example\")\n\nlet clientArrayRecordIdentifier = \"clientArray\"\nlet clientOne = Client(name: \"Chill Client\")\nlet repository = FileSystemRepository(\n\tdirectoryName: \"Clients Database\",\n\tdataTransformer: JSONDataTransformer()\n)\nlet array = [clientOne]\ntry await repository.create(id: clientArrayRecordIdentifier, item: array)\nlet savedArray: [Client] = try await repository.read(id: clientArrayRecordIdentifier)\nprint(savedArray.first!)\n<\/code><\/pre>\n<\/div>\n<\/div>\n
UserDefaultsRepository \u306e\u521d\u671f\u5316\u306f\u3001\u9069\u5207\u306a\u5f15\u6570\u3092\u5099\u3048\u305f FileSystemRepository \u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u307e\u3057\u305f\u3002
\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30b3\u30fc\u30c9\u306e 2 \u756a\u76ee\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u300cClients Database\u300d\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u306f\u30011 \u3064\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u69cb\u9020\u3092\u6301\u3064 JSON \u3067\u30b7\u30ea\u30a2\u30eb\u5316\u3055\u308c\u305f\u914d\u5217\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u30c7\u30fc\u30bf\u4fdd\u5b58\u5f62\u5f0f\u306e\u5207\u308a\u66ff\u3048<\/p>\n
\u6b21\u306b\u3001ChatGPT \u306b XML \u306e\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3068\u30c7\u30b3\u30fc\u30c0\u30fc\u3092\u751f\u6210\u3059\u308b\u3088\u3046\u4f9d\u983c\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
\n
\tlet formatExtension = \"xml\"\n    \n\tfunc encode<T: Encodable>(_ item: T) async throws -> Data {\n    \tlet encoder = PropertyListEncoder()\n    \tencoder.outputFormat = .xml\n    \treturn try encoder.encode(item)\n\t}\n    \n\tfunc decode<T: Decodable>(data: Data) async throws -> T {\n    \tlet decoder = PropertyListDecoder()\n    \treturn try decoder.decode(T.self, from: data)\n\t}\n}\n<\/code><\/pre>\n<\/div>\n<\/div>\n
Swift \u306e\u7d44\u307f\u8fbc\u307f\u578b\u306e\u304a\u304b\u3052\u3067\u3001\u30cb\u30e5\u30fc\u30e9\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30bf\u30b9\u30af\u304c\u521d\u6b69\u7684\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30b3\u30fc\u30c9\u3067 JSON \u3092 XML \u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n
\n
\n
\nprint(\"One item access example\")\n\ndo {\n\tlet clientRecordIdentifier = \"client\"\n\tlet clientOne = Client(name: \"Chill Client\")\n\tlet repository = FileSystemRepository(\n    \tdirectoryName: \"Clients Database\",\n    \tdataTransformer: XMLDataTransformer()\n\t)\n\ttry await repository.create(id: clientRecordIdentifier, item: clientOne)\n\tvar clientRecord: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(\"Client Name: \\(clientRecord.name)\")\n\tclientRecord.name = \"Busy Client\"\n\ttry await repository.update(id: clientRecordIdentifier, item: clientRecord)\n\tlet updatedClient: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(\"Updated Client Name: \\(updatedClient.name)\")\n\ttry await repository.delete(id: clientRecordIdentifier)\n\tlet removedClientRecord: Client = try await repository.read(id: clientRecordIdentifier)\n\tprint(removedClientRecord)\n}\ncatch {\n\tprint(error.localizedDescription)\n}\n\nprint(\"Array access example\")\n\nlet clientArrayRecordIdentifier = \"clientArray\"\nlet clientOne = Client(name: \"Chill Client\")\nlet repository = FileSystemRepository(\n\tdirectoryName: \"Clients Database\",\n\tdataTransformer: XMLDataTransformer()\n)\nlet array = [clientOne]\ntry await repository.create(id: clientArrayRecordIdentifier, item: array)\nlet savedArray: [Client] = try await repository.read(id: clientArrayRecordIdentifier)\nprint(savedArray.first!)\n<\/code><\/pre>\n<\/div>\n<\/div>\n
\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30b3\u30fc\u30c9\u306f 1 \u3064\u306e\u5f0f JSONDataTransformer -> \u306e\u307f\u306b\u5909\u66f4\u3055\u308c\u307e\u3057\u305f\u3002 XMLDataTransformer<\/p>\n
\u5408\u8a08<\/p>\n
CRUD \u30ea\u30dd\u30b8\u30c8\u30ea\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 \u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3 \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u758e\u7d50\u5408\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u308b\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u306e 1 \u3064\u3067\u3059\u3002\u3082\u3046 1 \u3064\u306e\u89e3\u6c7a\u7b56 – ORM (Object-Relational Mapping) \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001ORM \u306f\u69cb\u9020\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5b8c\u5168\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3001\u30e2\u30c7\u30eb\u306b\u3088\u308b\u5909\u66f4\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4e0a\u306b\u8868\u793a (\u30de\u30c3\u30d4\u30f3\u30b0 (!)) \u3059\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
\u3057\u304b\u3057\u3001\u305d\u308c\u306f\u307e\u3063\u305f\u304f\u5225\u306e\u8a71\u3067\u3059\u3002<\/p>\n
Swift \u7528\u306e CRUD \u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u5b8c\u5168\u306a\u5b9f\u88c5\u306f\u3001\u6b21\u306e\u5834\u6240\u304b\u3089\u5165\u624b\u3067\u304d\u307e\u3059\u3002
https:\/\/gitlab.com\/demensdeum\/crud-example<\/a><\/p>\n
\u3068\u3053\u308d\u3067\u3001Swift \u306f macOS \u4ee5\u5916\u3067\u3082\u9577\u3044\u9593\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u8a18\u4e8b\u306e\u30b3\u30fc\u30c9\u306f\u3059\u3079\u3066 Arch Linux \u4e0a\u3067\u4f5c\u6210\u3055\u308c\u3001\u30c6\u30b9\u30c8\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n
\u30bd\u30fc\u30b9<\/p>\n
https:\/\/developer.apple.com\/documentation\/combine\/topleveldecoder <\/a>
https:\/\/developer.apple.com\/documentation\/combine\/toplevelencoder<\/a>
\nhttps:\/\/en.wikipedia.org\/wiki\/Create,_read,_update_and_delete<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u306e\u30ce\u30fc\u30c8\u3067\u306f\u3001\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u308b\u53e4\u5178\u7684\u306a CRUD \u30d1\u30bf\u30fc\u30f3\u3001Swift \u8a00\u8a9e\u3067\u306e\u5b9f\u88c5\u306e\u57fa\u672c\u539f\u5247\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 Swift \u306f\u3001Windows\u3001Linux\u3001macOS\u3001iOS\u3001Android \u3067\u5229\u7528\u3067\u304d\u308b\u30aa\u30fc\u30d7\u30f3\u306a\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u8a00\u8a9e\u3067\u3059\u3002 \u30c7\u30fc\u30bf \u30b9\u30c8\u30ec\u30fc\u30b8\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 \u30ed\u30b8\u30c3\u30af\u3092\u62bd\u8c61\u5316\u3059\u308b\u305f\u3081\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306f\u6570\u591a\u304f\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e 1 \u3064\u304c CRUD \u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002\u3053\u308c\u306f C– \u306e\u982d\u5b57\u8a9e\u3067\u3059\u3002\u4f5c\u6210\u3001R -\u8aad\u307f\u53d6\u308a\u3001U –\u6700\u65b0\u60c5\u5831\u3001D–\u524a\u9664 \u3057\u307e\u3059\u3002\u901a\u5e38\u3001\u3053\u306e\u539f\u5247\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u5b9f\u88c5\u3092\u901a\u3058\u3066\u5b9f\u88c5\u3055\u308c\u3001\u8981\u7d20\u306f id \u306a\u3069\u306e\u4e00\u610f\u306e\u8b58\u5225\u5b50\u3092\u4f7f\u7528\u3057\u3066\u64cd\u4f5c\u3055\u308c\u307e\u3059\u3002 CRUD – \u6587\u5b57\u3054\u3068\u306b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\u4f5c\u6210(\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001ID)\u3001\u8aad\u307f\u53d6\u308a(ID)\u3001\u66f4\u65b0(\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001ID)\u3001\u524a\u9664(\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001ID)\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5185\u90e8\u306b ID 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