Question

我想添加一个类别，如果成功，请将其推荐给用户＆＃39;采集。这就是我如何做到这一点：

那是我的＆＃34; dashboard.js＆＃34;包含类别架构的文件。

var users = require('./users');

var category = mongoose.model('categories', new mongoose.Schema({
    _id:     String,
    name:    String,
    ownerId: { type: String, ref: 'users' }
}));

router.post('/settings/addCategory', function(req, res, next) {
  console.log(req.body);
  var category_toAdd = new category();
  category_toAdd._id = mongoose.Types.ObjectId();
  category_toAdd.name = req.body.categoryName;
  category_toAdd.ownerId = req.body.ownerId;

  category.findOne({
    name: req.body.categoryName,
    ownerId: req.body.ownerId
  }, function(error, result) {
     if(error) console.log(error);
     else {
       if(result === null) {
         category_toAdd.save(function(error) {
           if(error) console.log(error);
           else {
             console.log("Added category: " + category_toAdd);
<<<<<<<<<<<<<<<<<<<THE CONSOLE LOG WORKS GOOD
             users.categories.push(category_toAdd);
           }
         });
       }
     }
  });

这是我的＆＃34; users.js＆＃34;包含＆＃34;用户＆＃34;的文件架构。

var categories = require('./dashboard');

var user = mongoose.model('users', new mongoose.Schema({
    _id:          String,
    login:        String,
    password:     String,
    email:        String,
    categories:   [{ type: String, ref: 'categories' }]
}));

因此，类别add proccess运行良好，我可以在数据库中找到该类别。问题是当我试图将类别推送给用户时。

这一行：

users.categories.push(category_toAdd);

我收到此错误：

Cannot read property "push" of undefined.

我需要再次承认，在推送之前有一个console.log正确打印类别。

感谢您的时间。

Answer 1

users对象是Mongoose模型，而不是它的实例。您需要... category_toAdd = { _id: mongoose.Types.ObjectId(), name: req.body.categoryName, ownerId: req.body.ownerId }; // Create the category here. `category` is the saved category. category.create(category_toAdd, function (err, category) { if (err) console.log(err); // Find the `user` that owns the category. users.findOne(category.ownerId, function (err, user) { if (err) console.log(err); // Add the category to the user's `categories` array. user.categories.push(category); }); });模型的正确实例才能将类别添加到。

<强> dashboard.js

 <PFeed>
  <PID> MyProcess </PID>
  <Version>1</Version>
  <MetaData>
      <Id> MyMetadataId </Id>
  </MetaData>
 <AllFeeds>
   <FeedContent>
      <Id> FeedContentId </Id>
   </FeedContent>
 </AllFeeds>
</PFeed>

猫鼬 - 推送参考 - 无法阅读财产＆＃34;推＆＃34;未定义的

1 个答案: