mongoose GH-341.js - Response to sebm

mongoose.GH.341.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/sebtest');

var Schema = mongoose.Schema;

var StackItemSchema = new Schema({
  blob: Number
});

var StackSchema = new Schema({
    name: String
  , items: [StackItemSchema]
});

var Stack = mongoose.model('Stack', StackSchema);

function addItems (stack) {
  console.log("The stack is ...");
  console.log(stack);
  console.log("\n");

  console.log('Gonna add some items now');
  stack.items.push({ blob:Math.random() }); 
  stack.items.push({ blob:Math.random() });
  stack.items.push({ blob:Math.random() });
  stack.items.push({ blob:Math.random() });
  console.log("... added an item. stack looks like ...");
  console.log(stack);
  console.log("\n");
  stack.save( function (err, stack) {
    if (err) throw err;
    console.log("item push persisted to mongodb");
    console.log(stack);
    console.log("\n");
    
    console.log("removing the item");
    while (stack.items[0]) {
      stack.items[0].remove();
    }
    console.log(stack);
    console.log("\n");
    
    stack.save( function (err, stack) {
      if (err) throw err;
      
      Stack.findOne({name:'The Stack'}, function (err, stack) {
        if (err) throw err;
        
        console.log("removal persisted to mongodb, not");
        console.log(stack);
        mongoose.disconnect();
      });
    });
  });
}

Stack.findOne({name:'The Stack'}, function (err, stack) {
  if (err) throw err;
  
  if (!stack) {
    return Stack.create({name: 'The Stack'}, function (err, stack) {
      if (err) throw err;
      addItems(stack);
    });
  }
  
  return addItems(stack);
});