Facebook Graph API
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LAMBDA_LABS_Family_Promise
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This guide explains how to get started with receiving data from the Facebook Social Graph.
You will need:
A – This app will be for testing so there is no need to involve your app code when creating this Facebook App.
The open in a separate browser window
A brief understanding of the structure of the Facebook Social Graph from our guide
This allows you to execute the examples as you read this tutorial.
The explorer loads with a default query with the GET method, the lastest version of the Graph API, the /me node and the id and name fields in the , and your Facebook App.
Click the Generate Access Token button. A Log in With Facebook window will pop up. This popup is your app asking for your permission to get your name and profile picture from Facebook.
Click Continue as...
A User Access Token is created. This token contains information such as the app making the request, the person using the app to make a request, if the access token is still valid (it expires in about an hour), the expiration time, and the scope of data the app can request. In this request the scope is public_profile which includes your name and profile picture.
Click the information circle icon next to the acces token to view the token's information.
Click the Submit button in the upper right corner.
What You Should See
If you remove ?fields=id,name from the query string field and click Submit, you will see the same result since name and id are the User node fields returned by default.
Let's make the First Request a little more complex by adding another field, email. There are two ways to add fields:
Start typing in the query string field.
Let's add the email field and click Submit.
What You Should See
Almost all nodes and fields need a specific permission to access them. The debug message is telling you that you need to give your app permission to access the email address that you have associated with your Facebook account.
In the right side panel, under Permissions, click the Add a Permission dropdown menu. Click User Data Permissions and select email.
Generate A New User Access Token
Because you are changing the scope of the access token, you need to create a new one. Click Generate Access Token. Just like your first request, you must give your app permission to access your email in the Facebook Login dialog.
Once the new token has been created, click Submit. Now all fields in your request will be returned.
Try getting your Facebook posts.
Links in the Response
Notice that id values returned in the response window are links. These links can represent nodes, such as User, Page, or Post. If you click on a link, the ID will replace the contents of the query string field. Now you can run requests on that node. Because this node is connected to the parent node, a Post of a User, you may not need to add permissions. You can click on a Post ID now since we will be using it in the next example.
Notice: Some IDs are a combination of the parent ID and a new ID string. For example, a User's Post will have a Post ID that looks something like this: 1028223264288_102224043055529 where 1028223264288 is the User ID.
The User node does not have many edges that can return data. Access to User objects can only be given by the User who owns the object. In most cases, a User owns an object if they created it.
For example, if you publish a post you can see information about the post such as when it was created, text, photos, and links shared in the post, and the number of reactions the post received. If you comment on your post, you will be able to get that comment, but if another person publishes a comment on your post, you will not be able to see the comment or who published it.
We recommend that you implement the Facebook SDK for your app. This SDK will include Facebook Login which allows your app to ask for permissions and get access tokens.
This flow is our product that allows a person to log into an app using their Facebook credentials. Facebook Login allows an app to ask a person to access the person's Facebook data, and for the person to accept or decline access. Your name and profile picture are public, to allow people to find you on Facebook, so no additional requirements are needed to run this request.
In the , you will see a JSON response with your Facebook User ID and your name.
Click the search dropdown menu in the to the left of the response window
While the call did not fail, only the name and id fields were returned along with a debug message. Click the (Show) link to debug the request.
Try getting the number of reactions for one of your posts. You will want to take a look at the
The explorer tool lets you test requests and once you have a successful response, you can get the code to insert into your app code. At the bottom of the response window, click Get Code. The explorer offers Android, iOS, JavaScript, PHP, and cURL code. The code is pre-selected so you can just copy and paste.
You can use the Graph Explorer to test any request for Users, Pages, Groups, and more. Visit the for each node or edge to determine the permission and access token type required.
