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Creating a mongoose model takes two different parts, a schema and the model.

The schema will define the parts of the object your are trying to create. For instance, if we created a blog post, it would look like:

var mongoose = require('mongoose');
var Schema   = mongoose.Schema;

var postSchema = new Schema({
  title:  String,
  author: String,
  body:   String,
  comments: [{ body: String, date: Date }],
  date: { type: Date, default: Date.now },
  hidden: Boolean,
  meta: {
    votes: Number,
    favs:  Number

In our case, for our event, we have:

// create a schema
const eventSchema = new Schema({
  name: String,
  slug: {
    type: String,
    unique: true
  description: String

// create the model
const eventModel = mongoose.model('Event', eventSchema);

We'll also be using middleware to have our model process something before it saves. In our case, we'll be creating a slug from the title.

// middleware -----
// make sure that the slug is created from the name
eventSchema.pre('save', function(next) {
  this.slug = slugify(this.name);

// function to slugify a name
function slugify(text) {
  return text.toString().toLowerCase()
    .replace(/\s+/g, '-')           // Replace spaces with -
    .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
    .replace(/\-\-+/g, '-')         // Replace multiple - with single -
    .replace(/^-+/, '')             // Trim - from start of text
    .replace(/-+$/, '');            // Trim - from end of text

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