text: const mongoose = require('mongoose');
  
  const Schema = mongoose.Schema;
  
  const POSchema = new Schema ({
      po_number:{
          type: Number,
          trim: true
      }
  }, { collection: 'purchase_orders' })
  
  const PurchaseOrders = mongoose.model('PurchaseOrders', POSchema);
  
  module.exports = PurchaseOrders;
  