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model/book.model.js

+const mongoose = require('mongoose');
+
+const Schema = mongoose.Schema;
+
+const bookSchema = new Schema({
+  _id : {type: String,required: true},
+  book_name: { type: String,unique: true, required: true },
+  author: { type: String, required: true },
+  price: {type: Number, required: true},
+}, {
+  timestamps: true,
+});
+
+
+const Book = mongoose.model('Book', bookSchema);
+
+module.exports = Book;
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