finish taller4

taller4/models/book.js

@@ -0,0 +1,26 @@
+'use strict'
+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+const BookSchema = Schema(
+  {
+    nombre: {
+      type:String,
+      required: true
+    },
+    anio: {
+      type:Number,
+      required: true
+    },
+    idioma: {
+      type: String,
+      enum: ['ING','ESP'],
+      required: true
+    },
+    autor: {
+      type:String,
+      required: true
+    }
+  }
+);
+
+module.exports = mongoose.model('books', BookSchema);