Run npm install to install the pre-requisites

Look over the index.js file to get familiar with your starting point.

Make sure postgres is running on your computer.

Run npm install --save massive

Require massive at the top of your index file.

var massive = require('massive');

Make a new database in postgres called sandbox

Add a new table to that database ( pgAdmin tutorial on how to do both of these ) :

CREATE TABLE airplanes (
  planeid SERIAL PRIMARY KEY NOT NULL, -- The primary key
  planetype varchar(40) NOT NULL, -- The IP of the host
  passengercount integer NOT NULL -- The name of the host
);

We need to get a copy of massive ot use. We need : connectionString > connection > db

Add a connection string under your call to require massive. Change the part that says jeremyrobertson to have your user name. (If you included password it will look like username:password@localhost/sandbox

connectionString

var massive = require('massive');
var connectionString = "postgres://jeremyrobertson@localhost/sandbox";

Use our connection string to get a copy/instance of massive to use. Then add it to our app as a variable called db.

connection

var massiveInstance = massive.connectSync({connectionString : connectionString})

app.set('db', massiveInstance);

Next we can get our db back out of the app

db

var db = app.get('db');

Now that we have our db we can use it to add a new plane:

db.new_plane(function(err, planes){
    console.log(err, "plane added")
});

This works by looking in the /db folder in our app fore a file called new_plane.sql

We've added a plane, comment those 3 lines of code out so we don't add duplicates.

Do the same thing to get all planes using the get_planes file

db.get_planes(function(err, planes){
    console.log(err, planes)
})

To use our db in different files we need to do 2 things:

• export the app made by express
• import it and use it in our other file
• call our controller

export our app

//Replace
var app = express();

//With
var app = module.exports = express();

This makes it so index.js exports our app.

__ import it and use it in another file__

Create a controller.js and put this code inside.

var app = require('./index');

module.exports = {
    getPlanes: function(){
        var db = app.get('db');

        db.get_planes(function(err, planes){
            console.log(err, planes);
        })
    }
}

call our controller

Comment out call calls to db in your index.js and replace them with a call to the controller and the get planes function.

var controller = require('./controller.js');

controller.getPlanes();

In get_planes.sql uncomment out where passengercount > $1 by removing the two -- in front of it.

The $1 acts as a place holder for the 'first' parameter passed in.

To pass that in change the query in controller.js to take parameters before the function.

db.get_planes([25], function(err, planes){
    console.log(err, planes);
})

We are now getting all planes with a passenger count greater than 25.

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