我想将新类别推入现有类别，但没有这样做，并返回一个空数组。
我也使用.save（）进行了尝试，但是并没有太大帮助。
//发布路线
Typedef uint8 x[4]
//猫鼬模式
router.post('/category', middleware.isAdmin, upload.single('category[image]'), async function(req,res, next){
try {
let result = await cloudinary.v2.uploader.upload(req.file.path,{ // upload image to cloudinary
folder: 'category_images',
use_filename: true
});
let categories = await Category.find({});
let i = await categories.findIndex((e) => e.name === req.body.category.name); // find if category name already exits
if(i === -1){
let newCategory = { //create new category name
name : req.body.category.name,
image : result.secure_url,
imageId : result.public_id
};
// categories.push(newCategory);
// categories.save();
// // Category.save();
await Category.findOneAndUpdate({_id: req.user.cart.id}, {$push: {categories: newCategory}}); // push the newCategory to existing category array
let categories = await Category.find({});
console.log(categories);
req.flash('success','category added to db');
console.log(categories);
}
else {
req.flash('error', 'categorory already exits');
}
res.redirect('back');
}
catch(err){
req.flash('error', err.message, err.name);
console.log(err);
res.redirect('back');
}
});
我做var mongoose = require("mongoose");
var categorySchema = new mongoose.Schema ({
categories : [
{
name: String,
image : String,
ImageId : String
}
]
}
);
module.exports = mongoose.model('Category', categorySchema);
时返回[]。