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First of all we're going to need the Http module that Angular has. So let's go ahead and add some methods to our ProjectsService here. An Angular queue uses dependency injection in this way so that it can easily inject mock services and things like that if you want to test your components. As we'll see a bit later on, we use dependency injection to get an instance of this project service within a component that uses the project's service. Injectable makes this class something that Angular can use as dependency injection. So we'll just call Injectable, and then export our class. Now as I said, Injectable is a decorator, and it doesn't take any properties. So let's import Injectable from angular/core. But there is another decorator that we need, and that is Injectable. Now of course a service is not a component, so there's no need to import the component decorator. So inside of our app directory, let's create a projects service. It's just an easy way to wrap up some functionality. In Angular, a service is basically any set of functionality that we want to be available to multiple components. So in this video, we are going to create a project service. We want to have some way of getting a list of projects from our server. However, that's not a long-term solution. Right now, the projects that we are displaying to the user are just hard coded right into our projects component. Now let’s call the method and get the response.In the course so far, we've been building a project management application. This method gets the wrapped response, unwraps it, makes proper instances out it (in this case Contact instance), and then returns it as an input for the subscriber. This search param object is passed on to the server in the API call.
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The above code takes search params as an argument. We have created a query method which makes the API call and returns on observable to be subscribed. Provide(LocationStrategy, )Ĭontacts.push(omJson(contact)) Consider the following code sample from bootstrap.ts. To start, we need to configure the application during bootstrap. For instance, you can have your own private fields, getters and setters, constraints etc. Models give definition to your data and have attributes that are used by both services and components. Knowledge of data in our application resides in services. Components have limited ability to handle the data coming from the user. Components handle the UI, handling how the app interacts with the user. Our address book application is broken into pieces like components, services, and models. It’s always better to first think about the architecture of an application before jumping into the code. Angular 1.5 also has a new feature called components for upgrading your existing Angular app to Angular 2. You can still write Angular 2 apps in Javascript, ES6 or Dart. Note that Typescript is not compulsory for Angular 2.
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The quickstart shows you how to organize code and create components in Angular 2. To get started with Angular 2, start by reading the 5 Minute Quickstart from angular.io. Expressing your application architecture with interfaces and classes is cleaner than using Javascript prototypes and its inheritance architecture. A benefit of Typescript is its tooling, including auto completion, easy refactoring, and code navigation. Typescript syntax contains all the features of ECMAScript2015, such as classes and modules. The code has been organized using components and modules and uses Typescript instead of Javascript (Typescript is a typed superset of Javascript which gets compiled to plain Javascript before being served to the client). The GitHub repo contains all the required setup to communicate with your DreamFactory instance. The Angular 2 address book is a boilerplate application for getting started with Angular 2 and DreamFactory. In this post, I’ll go over some important things to know about the Angular 2 example app. The new Angular 2 address book app is a great way to get started with Angular 2 and learn how easy it is to call DreamFactory’s REST API (to see how to put a REST API on AWS Redshift, check this post).