未定义NodeJS变量

Question

我似乎找不到问题，为什么这不起作用。当我转到localhost：3000时，出现此错误ReferenceError: pixwords is not defined

app.get('/', (req, res) => {
Word.find().then((pixwords) => {
    if(!pixwords) {
     return res.send('No text available');
    }
});
res.render('index.hbs', {pixwords});
});

这是index.hbs：

{{#each pixwords}}
    {{this.text}}
{{/each}}

Answer 1

pixwords仅在Word.find().then()的回调函数中定义，您只能在其中使用它：

app.get('/', (req, res) => {
  Word.find().then((pixwords) => { // <-- this declares pixwords
    if (!pixwords) {
      return res.send('No text available');
    }
    res.render('index.hbs', { // <-- move the call in the .then
      pixwords
    });
  });
  // anything here is executed before Word.find has finished running
});