超出了最大调用堆栈大小

超出了最大调用堆栈大小

我正在使用Angular2和Meteor。由于我在客户端添加了该代码,因此我的Chrome控制台出现了一个异常(超出了最大调用堆栈大小):

var userChannelsId = UserChannels.find({idUser: Meteor.userId()});
this.channels = Channels.find({_id: {$in: userChannelsId}});


根据我的发现,当存在无限循环时会发生此异常。我确定错误来自此行(在确定之前,我调试了代码)。
问题是否出在第二次开始时第一次搜索未完成的事实?

全部功能:

getChannelList(): void {
    console.log('ok');
    var userChannelsId = UserChannels.find({idUser: Meteor.userId()});
    this.channels = Channels.find({_id: {$in: userChannelsId}});
    console.log('ko');

    this.channels.subscribe(channel => {
        this.selectChannel(channel[0]);
    });
}


编辑:

作为@MichaelSolati,我尝试仅获取userChannel的IdChannel,但我仍然遇到相同的错误……它返回一个可观察的数组,而不是数组。也许是问题所在?这是我所做的:

getChannelList(): void {
    console.log('ok');
    let userId = Meteor.userId();
    var userChannelsId = UserChannels.find({idUser: userId});
    var values = userChannelsId.map((userChannels:Array<UserChannel>) => {
        let result:Array<String> = [];
        if (userChannels) {
            userChannels.forEach((userChan) => {
                result.push(userChan.idChannel);
            });
        }
        return result;
    });
    this.channels = Channels.find({_id: {$in: values}});
    console.log('ko');
    this.channels.subscribe(channel => { this.selectChannel(channel[0]); });
}

最佳答案

由于对查询使用MeteorRxJS而进行了更新。尽管这可能并不完美,但它应该使您走上正确的道路。

private userChannelsSub: Subscription;

getChannelList(): void {
    console.log('ok');
    let userId = Meteor.userId():
    let this.userChannelsSub = UserChannels.find({idUser: userId}).subscribe((userChannels: any[]) => {
        if (Array.isArray(userChannels)) {
            let userChannelsId = userChannels.map((channel: any) => { return channel._id; });
            if (this.channels) { this.channels.unsubscribe(); }
            this.channels = Channels.find({_id: {$in: userChannelsId}}).subscribe((channels: any[]) => {
                this.selectChannel(channels[0]);
            });
        }
    });
    console.log('ko');
}

09-13 11:34