** No se puede sobrescribir el modelo de categories una vez compilado. **

 const mongoose = require("mongoose"); const schema = mongoose.Schema; // create url connect data base const url = "mongodb://localhost:27017/STOREBOOKS"; // create category for schema const category = schema({ name: String, }); // create crcategory in model categores const Cats = mongoose.model("categoreis", category); // this function return all categories of Promise exports.getAllcategories = () => { return new Promise((resolve, reject) => { mongoose .connect(url, { useNewUrlParser: true, useUnifiedTopology: true, }) .then(() => Cats.find()) .then((cats) => { mongoose.disconnect(); resolve(cats); }) .catch((err) => { reject(err); }); }); };

 ** throw new _mongoose.Error.OverwriteModelError(name);**