无法读取节点模块中未定义sqllite.js的属性“ get”

Question

我正在使用node.js，Laravel和laravel Echo Server进行聊天。我几乎已经完成了所有工作，但现在运行命令

  

laravel-echo-server启动

我收到的回复包含错误，这是我收到的回复。

⚠ Starting server in DEV mode...

✔  Running at localhost on port 6001
✔  Channels are ready.
✔  Listening for http events...
[3:00:58 PM] - Sending auth request to: 
http://localhost:8000/broadcasting/auth

[3:00:58 PM] - Sending auth request to: 
http://localhost:8000/broadcasting/auth

✔  Listening for redis events...

Server ready!

[3:00:58 PM] - PP2r5r6ggbzVMHJSAAAA authenticated for: private-chat
[3:00:58 PM] - PP2r5r6ggbzVMHJSAAAA joined channel: private-chat
[3:00:58 PM] - PP2r5r6ggbzVMHJSAAAA authenticated for: presence-chat-room-1
[3:00:58 PM] - PP2r5r6ggbzVMHJSAAAA joined channel: presence-chat-room-1
TypeError: Cannot read property 'get' of undefined
at C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\database\sqlite.js:24:27
at new Promise (<anonymous>)
at SQLiteDatabase.get 
(C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\database\sqlite.js:23:16)
at Database.get (C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\database\database.js:20:28)
at PresenceChannel.getMembers 
(C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\channels\presence-channel.js:13:24)
at C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\channels\presence-channel.js:18:19
at new Promise (<anonymous>)
at PresenceChannel.isMember 
(C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\channels\presence-channel.js:17:16)
at PresenceChannel.join 
(C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\channels\presence-channel.js:50:14)
at C:\Users\FLH\AppData\Roaming\npm\node_modules\laravel-echo- 
server\dist\channels\channel.js:70:32
at process.internalTickCallback (internal/process/next_tick.js:77:7)

现在，我也检查了sqllite.js文件，该文件中没有任何错误，但仍然收到此错误。如何摆脱这个错误。

这是我的sqllite.js文件代码。

catch (e) { }
var SQLiteDatabase = (function () {
function SQLiteDatabase(options) {
    var _this = this;
    this.options = options;
    if (!sqlite3)
        return;
    var path = process.cwd() + options.databaseConfig.sqlite.databasePath;
    this._sqlite = new sqlite3.cached.Database(path);
    this._sqlite.serialize(function () {
        _this._sqlite.run('CREATE TABLE IF NOT EXISTS key_value (key VARCHAR(255), value TEXT)');
        _this._sqlite.run('CREATE UNIQUE INDEX IF NOT EXISTS key_index ON key_value (key)');
    });
}
SQLiteDatabase.prototype.get = function (key) {
    var _this = this;
    return new Promise(function (resolve, reject) {
        _this._sqlite.get("SELECT value FROM key_value WHERE key = $key", {
            $key: key,
        }, function (error, row) {
            if (error) {
                reject(error);
            }
            var result = row ? JSON.parse(row.value) : null;
            resolve(result);
        });
    });
};
SQLiteDatabase.prototype.set = function (key, value) {
    this._sqlite.run("INSERT OR REPLACE INTO key_value (key, value) VALUES ($key, $value)", {
        $key: key,
        $value: JSON.stringify(value)
    });
};
return SQLiteDatabase;
}());
exports.SQLiteDatabase = SQLiteDatabase;

谢谢。