- Define User Registration Routes 3:52
- Using Nodemon While Developing an Express App 3:20
- Creating a Registration Form With Pug (Jade) 7:18
- Review: Routes, Nodemon and Pug 5 questions
- Setting Up Mongoose and a Mongo Database 4:34
- Defining a Mongo Schema with Mongoose 4:44
- Adding Data to the Database 9:46
- Review: Mongo, Mongoose and Schemas 5 questions
- Hashing and Salting 2:53
- Storing Passwords Securely 5:54
- Review: Passwords, Hashing and Salting 5 questions
Preview
Video Player
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Setting Up Mongoose and a Mongo Database
4:34In this video you'll learn how to install Mongoose and create a connection to a MongoDB database.
We've created a registration form for
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the bookworm site, but
that's just the beginning.
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Although we can submit information
from the form, we don't yet
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have a way to save that data.
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That's where a database comes in.
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In this course we'll use MongoDB
to store user registration data.
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And to make working with Mongo easier,
we'll use a node module called Mongoose.
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Mongoose is what's known as an ODM or
object data modeling library.
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An ODM simplifies the process of adding,
searching,
0:28
and updating records in
a document-based database.
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Mongoose is the most popular ODM for
working with Express and MongoDB.
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So it's a great choice for this project.
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Let's get started by installing Mongoose.
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If you're following along, you'll need to
have MongoDB installed on your computer.
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I'm not going to take you
through that step here.
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I've listed instructions in
the teacher's notes as well as a link to
0:51
other treehouse courses
that teach Mongo DB.
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In addition, if you're following along and
you've skipped a video or
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your code doesn't seem to be working, you
can catch up with me by using the console
1:00
or terminal to navigate to the proper
folder in the downloaded files.
1:05
For example, S2V3 for this video, and
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typing npm install to get
the node modules in place.
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You can then open that folder in your
text editor, and follow along from there.
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It's time to install mongoose.
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Open a terminal program and
navigate to the directory for
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this project and
type npm install --save mongoose.
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Remember that the --save flag adds this
dependency to the package.json file.
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This makes it easy for other people
to install the entire application
1:44
with a simple npm install command,
and it means we don't have to package
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multiple megabytes of node modules to
share this project with someone else.
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To add Mongoose to our application and
connect to MongoDB,
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we'll add some code to
the app.js file in our project.
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First we need to require Mongoose.
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I'll add it up here where
I load other node modules.
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I'm storing this in
a variable called mongoose.
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We can then use that variable whenever
we want to use Mongoose to connect
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the Mongo DB.
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Next I'll connect to
Mongo DB using Mongoose.
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We're passing one argument to
the connect method, the Mongo database.
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This connects to Mongo DB on this machine,
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local host on port 27017.
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That's the default port for Mongo DB.
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The last part here is the name of
the Mongo data store, bookworm,
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the name of the database for our site.
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That database doesn't yet exist, but when
our app starts, Mongoose will create it.
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Now, let's create a variable to hold
the database connection object.
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I'll call it db.
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And it represents that
connection to MongoDB.
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We can use that object
to add an error handler.
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This code listens for error events or
errors that occur with our database
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connection, and
logs those errors to the console.
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Let's see how it works.
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I'll save this file, and
return to my terminal program.
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And I'll start it up by typing nodemon.
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It looks like we have an error.
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It says connection error.
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Yeah, I haven't started Nongo yet.
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I can do that on my Mac just
by running the Mongo daemon.
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I'll open another tab and
type mongod and hit return.
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That starts up Mongo.
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If you're on Windows, you need to find and
start the Mongo executable file.
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See the teacher's notes below.
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Once Mongo is running,
I can start my app again.
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Notice that the server is still running
despite the lack of database connection,
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and nodemon unfortunately doesn't restart
automatically when Mongo is started.
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So I need to stop the express
server with Ctrl+C.
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Then I can start it again with nodemon.
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Great!
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This time no errors, so the application
has successfully connected to Mongo.
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In the next video, we'll create a model,
which is also called a schema,
4:27
for the registration form
data we want to collect.
4:30