Mongoose只推送ObjectID，而不是整个文档

Question

我有一个食谱博客网站，每个食谱都有评论。每个注释都保存到注释集合中，但当我将注释推送到正确的配方时，只保存ObjectID。这是我的代码：

配方模型

const { Double } = require('bson');
const mongoose = require('mongoose');
const recipeSchema = new mongoose.Schema({
name: {
type: String,
required: 'This field is required.'
},
description: {
type: String,
required: 'This field is required.'
},
quantity: {
type: Array,
required: 'This field is required.'
},
ingredients: {
type: Array,
required: 'This field is required.'
},
comments: [
{
type: mongoose.Schema.Types.ObjectId,
ref: 'Comment'
}
],
recipe_id: {
type: String,
}
});
recipeSchema.index({ name: 'text', description: 'text' });
const Recipe = module.exports = mongoose.model('Recipe', recipeSchema);

注释模型

const commentSchema = new mongoose.Schema({
username: {
type: String,
required: 'This field is required.'
},
comment: {
type: String,
required: 'This field is required.'
},
recipe_id: {
type: String
}
});

路线

router.get('/', recipeController.homepage);
router.get('/recipe/:id', recipeController.exploreRecipe );
router.get('/categories/:id', recipeController.exploreCategoriesById);
router.get('/categories', recipeController.exploreCategories);
router.get('/submit-recipe', recipeController.submitRecipe);
router.post('/submit-recipe', recipeController.submitRecipeOnPost);
router.post('/recipe/:id/comments', recipeController.CommentRecipeOnPost);

控制器

module.exports.CommentRecipeOnPost = async(req, res) => {
const comment = new Comment({
username: req.body.username,
comment: req.body.comment
});
comment.save((err, result) => {
if (err){
console.log(err)
}else {
Recipe.findById(req.params.id, (err, post) =>{
if(err){
console.log(err);
}else{
post.comments.push(result);
post.save();
console.log('====comments=====')
console.log(post.comments);
res.redirect('/');
}
})
}
})
}

我尝试了populate和其他方法，但在我用这些方法进行了大量小时的编程后，没有人工作，我只能保存ObjectId-s。

Answer 1

这是因为您在配方模式中将注释定义为ObjectId，没错，如果您想获得完整的注释参数，您将填充记录

const recipe = await Recipe.findOne({ _id: "recordId"}).populate("posts") 

这将返回的所有评论详细信息

{  name: "Fitness recipe", description: "Fitness recipe to loss 10kg in 10 days only", comments: [ {_id: "recordId", username: "Smith June", comment: "That's awesome"}]}

如果您需要将整个文档保存为对象数组，而不仅仅是id，这样您就可以制作类似的模式

const recipeSchema = new mongoose.Schema({
name: {
type: String,
required: 'This field is required.'
},
description: {
type: String,
required: 'This field is required.'
},
quantity: {
type: Array,
required: 'This field is required.'
},
ingredients: {
type: Array,
required: 'This field is required.'
},
comments: [
{ username: String, comment: String }
],
recipe_id: {
type: String,
}
})

在这种情况下，你不会有任何关系，你可以很容易地列出食谱评论。