node.js - 首先加载特定的 Mongoose 模型

Question

我正在尝试在我的“喜欢”模型类(下面的代码)中使用模型(“目标”)。然而，每次我启动 Node 实例时，它都会说 Goal.findById 不是一个函数。

在每个模型中运行 console.log(number) 后，我发现它们的加载非常奇怪，并且不符合我想要/需要的顺序。

我想知道如何在其他人之前加载模型或为模型设置特定的加载顺序？

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var User = require('../models/user.js');
var Goal = require('../models/goal.js');

var likeSchema = new Schema({
userPosted: {
    type: Number,
    ref: 'user',
    required: true
},
goal: {
  type: Number,
  ref: 'goal',
  required: true
}},
{
  timestamps: true
});

likeSchema.post('save', function (doc, next) {
    var goalID = doc.goal;

Goal.findOne({'_id': doc.goal}, function(err, goal) {
    goal.likes.push(doc._id);
    goal.save();
    User.findById(doc.userPosted, function(err, user) {
        user.likedPosts.push(goalID);
        user.save();
        next();
    });
});
});

likeSchema.post('remove', function(doc) {
  Goal.findById(doc.goal, function(err, goal) {
      goal.likes.pull(doc._id);
      goal.save();

      User.findById(doc.userPosted, function(err, user) {
        user.likedPosts.pull(goal._id);
        user.save();
      });
  });
});

console.log("4");

module.exports = mongoose.model('like', likeSchema);

错误:

TypeError: Goal.findOne is not a function at model.<anonymous> (E:\Project\like.js:28:10)

**编辑:** goal.js

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var autoIncrement = require('mongoose-auto-increment');
var User = require('../models/user.js');
var Like = require('../models/like.js');

var goal = new Schema({
    user: {
        type: Number,
        ref: 'user',
        required: true
    },
    user_name: {
        type: String,
        required: true
    },
    title: {
        type: String,
        required: true,
        trim: true
    },
    description: {
        type: String,
        default: undefined,
        trim: true
    },
    location: {
        type: String,
        default: undefined
    },
    likes: [{
        type: Schema.ObjectId,
        ref: 'like'
    }],
    comments: [{
        type: Schema.ObjectId,
        ref: 'comment'
    }],
    updates: [{
      type: Schema.ObjectId,
      ref: 'update'
    }],
    created: {
        type: Date,
        default: Date.now
    },
    cover_image: {
        type: String,
        default: undefined
    },
    complete_by: {
        type: String,
        default: "Death"
    },
    completed: {
      type: Boolean,
      default: false
    },
    completedDate: {
        type: String,
        default: undefined
    },
    url: {
        type: String,
        default: undefined
    },
    sponsor: {
      type: String,
      default: undefined
    },
    private: {
        type: Boolean,
        default: false
    }
});

goal.plugin(autoIncrement.plugin, 'goal');

goal.pre('save', function (next) {
    this.wasNew = this.isNew;
    next();
});

goal.post('save', function (doc) {
    if (this.wasNew) {
        User.findById(doc.user, function (err, user) {
            user.goals.push(doc._id);
            user.save();
        });
    }
});

goal.post('remove', function(doc) {
  //TODO: Removes like objects/user profile/anything containing the goal
  User.findById(doc.user, function(err, user) {
      user.goals.pull(doc._id);
      user.save();
  });

  Like.find({
    'goal': doc._id
  }).remove(function(err, removed) {
    if(err) {
      console.log("ERROR?");
      return;
    }
    console.log('removed likes - ' + removed);
  });
});    

module.exports = mongoose.model('goal', goal);

Answer 1

我认为你的likeschema会是这样的 -

var likeSchema = new Schema({
userPosted: {
    type: Number,
    ref: 'User',
    required: true
},
goal: {
  type: Number,
  ref: 'Goal',
  required: true
}},
{
  timestamps: true
});

如果不起作用，您能否显示您的 Goal 模型代码？