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import 'dart:io';
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import 'package:flustars/flustars.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:project_telephony/model/send_number_model.dart';
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import 'package:sqflite/sqflite.dart';
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import 'package:path/path.dart';
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class DBManager {
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/// 数据库名
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final String _dbName = "dbName";
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/// 数据库版本
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final int _version = 1;
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static final DBManager _instance = DBManager._();
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factory DBManager() {
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return _instance;
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}
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DBManager._();
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static Database? _db;
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Future<Database> get db async {
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return _db ??= await _initDB();
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}
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/// 初始化数据库
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Future<Database> _initDB() async {
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Directory directory = await getApplicationDocumentsDirectory();
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String path = join(directory.path, _dbName);
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return await openDatabase(
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path,
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version: _version,
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onCreate: _onCreate,
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onUpgrade: _onUpgrade,
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);
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}
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/// 创建表
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Future _onCreate(Database db, int version) async {
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const String sql = """
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CREATE TABLE SendNumber(
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id INTEGER primary key AUTOINCREMENT,
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sendNumber TEXT,
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createdAt datetime
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)
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""";
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return await db.execute(sql);
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}
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/// 更新表
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Future _onUpgrade(Database db, int oldVersion, int newVersion) async {}
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/// 保存数据
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Future saveData(SendNumber sendNumber) async {
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Database database = await db;
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return await database.insert("SendNumber", sendNumber.toJson());
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}
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/// 使用SQL保存数据
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Future saveDataBySQL(SendNumber sendNumber) async {
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const String sql = """
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INSERT INTO SendNumber(sendNumber,createdAt) values(?,?)
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""";
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Database database = await db;
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return await database.rawInsert(sql, [sendNumber.sendNumber, sendNumber.createdAt]);
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}
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/// 查询全部数据
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Future<List<SendNumber>?> findAll() async {
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Database? database = await db;
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List<Map<String, Object?>> result = await database.query("SendNumber");
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if (result.isNotEmpty) {
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return result.map((e) => SendNumber.fromJson(e)).toList();
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} else {
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return [];
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}
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}
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///条件查询
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Future<List<SendNumber>?> find(String sendNumber) async {
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Database database = await db;
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List<Map<String, Object?>> result =
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await database.query("SendNumber", where: "sendNumber=?", whereArgs: [sendNumber]);
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if (result.isNotEmpty) {
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return result.map((e) => SendNumber.fromJson(e)).toList();
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} else {
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return [];
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}
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}
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/// 修改
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Future<int> update(SendNumber sendNumber) async {
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Database database = await db;
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sendNumber.createdAt = DateUtil.formatDate(DateTime.now());
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int count =
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await database.update("SendNumber", sendNumber.toJson(), where: "sendNumber=?", whereArgs: [sendNumber.sendNumber]);
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return count;
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}
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}
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@ -0,0 +1,27 @@
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import 'dart:convert';
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SendNumber sendNumberFromJson(String str) => SendNumber.fromJson(json.decode(str));
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String sendNumberToJson(SendNumber data) => json.encode(data.toJson());
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class SendNumber {
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SendNumber({
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this.sendNumber,
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this.createdAt,
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});
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SendNumber.fromJson(dynamic json) {
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sendNumber = json['sendNumber'];
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createdAt = json['createdAt'];
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}
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String? sendNumber;
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String? createdAt;
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Map<String, dynamic> toJson() {
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final map = <String, dynamic>{};
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map['sendNumber'] = sendNumber;
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map['createdAt'] = createdAt;
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return map;
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}
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}
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