Afwithngcli

This project was generated with angular-cli version 1.0.0-beta.10.

Development server

Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.

Code scaffolding

Run ng generate component component-name to generate a new component. You can also use ng generate directive/pipe/service/route/class.

Build

Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the -prod flag for a production build.

Running unit tests

Run ng test to execute the unit tests via Karma.

Running end-to-end tests

Run ng e2e to execute the end-to-end tests via Protractor. Before running the tests make sure you are serving the app via ng serve.

Deploying to Github Pages

Run ng github-pages:deploy to deploy to Github Pages.

Further help

To get more help on the angular-cli use ng --help or go check out the Angular-CLI README.

Sample AngularFire2 with Angular CLI Application

The name is shortened to "afwithngcli"

This application was built to demonstrated the nested AngularFire2 functionality demonstrated in this youtube video https://youtu.be/ngnSOTSS8Q8?t=1h6m37s

What we have is the following data structure

{
  "items":
      {
          "item1":{
              "name": "Item 1",
              "description": "Description for Item One"
          },
          "item2":{
              "name": "Item 2",
              "description": "abcd"
          }
      }
  "items_meta"{
      "item1":{
          "stockPrice": 12.34,
          "moreData": "more data on the stock price"
      },
      "item2":{
          "stockPrice": 386,
          "moreData": "lolz"
      }
  }
}

And we are trying to get a result that looks like this

"item1":{
    "name": "Item 1",
    "description": "Description for Item One",
    "meta" : {
        "stockPrice": 12.34,
        "moreData": "more data on the stock price"      
    }
},

So this is how we access the data using AngularFire2

  this.projects = af.list('/items').map((items) => {
    return items.map(item => {
      item.metadata = af.object('/items_meta/' + item.$key);
      return item;
    });

First we get the initial list of items af.list('/items') then we loop through the items and extract the item metadata using the $key from the current item as the part of the path for the next AngularFire2 query.

The second query af.object('/items_meta/' + item.$key) will add a new property to the original item and that propery will be another observable.

You access the observable(s) in the UI by using the async pipe which will update the data in the UI as the data changes in Firebase. The html code for the UI looks something like this.

<ul *ngFor="let item of projects | async">
  <li class="text">
    {{item.name}}
  </li>
  <p>
    {{(item.metadata | async)?.moreData}}
  </p>
    <p>
    {{(item.metadata | async)?.stockPrice}}
  </p>
</ul>

If you notice this code (item.metadata | async)?.stockPrice, we are using the elvis operator to make sure that the observable has some data in it before trying to access the properties moreData and stockPrice. I have to believe there is a cleaner way to code that up, but this is what I have for now.

Please provide feedback if you have any.

###Additional Content & Links

• Firebase
• AngularFire2 Documentation
• More Content and Samples on Firebase from my blog