小编Jos*_*ter的帖子

我使用Ember.js与本地存储适配器.更新记录时我遇到了一个奇怪的问题.

我有一个与hasMany关系的帖子和评论模型:

App.Post = DS.Model.extend({
    title: DS.attr('string'),
    comments: DS.hasMany('comment', {
        async: true
    })
});
App.Comment = DS.Model.extend({
    message: DS.attr('string')
});

这些是我的帖子和评论控制器:

App.PostsController = Ember.ArrayController.extend({
    newTitle: '',
    actions: {
        create: function() {
            var title = this.get('newTitle');
            var post = this.store.createRecord('post', {
                title: title
            });
            this.set('newTitle', '');
            post.save();
        }
    }
});
App.CommentsController = Ember.ArrayController.extend({
    needs: "post",
    post: Ember.computed.alias("controllers.post.model"),
    newMessage: '',
    actions: {
        create: function() {
            var message = this.get('newMessage');
            var comment = this.store.createRecord('comment', {
                message: message
            });
            var post = this.get('post');
            var …

我正在尝试运行node-gyp configure,但遇到以下错误:

gyp: binding.gyp not found (cwd: /usr/local/bin)
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/usr/local/lib/node_modules/node-gyp/lib/configure.js:337:16)
gyp ERR! stack     at ChildProcess.EventEmitter.emit (events.js:98:17)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (child_process.js:789:12)
gyp ERR! System Darwin 13.0.0
gyp ERR! command "node" "/usr/local/bin/node-gyp" "configure"
gyp ERR! cwd /usr/local/bin
gyp ERR! node -v v0.10.20
gyp ERR! node-gyp -v v0.12.2
gyp ERR! not ok 

我认为我在错误的目录中,但我不确定.我应该在哪个目录中运行它？

我想从CDN加载脚本,然后在React中执行该脚本公开的函数:

componentWillMount() {
    console.log('componentWillMount is called');
    const script = document.createElement('script');
    script.src = 'https://foo.azurewebsites.net/foo.js';
    document.body.appendChild(script);
}


componentDidMount() {
    console.log('componentDidMount is called');
    window.foo.render({
        formId: '77fd8848-791a-4f13-9c82-d24f9290edd7',
    }, '#container');
}


render() {
    console.log('render is called');
    return (
        <div id="container"></div>
    );
}

脚本有时需要花时间加载(通常是第一次),什么时候componentDidMount()被称为"foo"不可用,我得到这样的错误:

TypeError:无法读取未定义的属性'render'

如何componentDidMount()在脚本成功加载后确保调用？