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App-owned objects and user-owned objects
With the Object API you can create two kinds of objects:
- An app-owned object. These objects are used across your entire app. They are public, just like self-hosted objects. Anyone who uses your app can see them and they can be attached to any story your app creates.
- A user-owned object. A user-owned object is owned by a user. The privacy setting on a user-owned object can be changed so its only visible to a subset of a person’s audience. Stories created with a user-owned object are specific to the person attached to it.
Creating app-owned objects
In order to create an app-owned object you make a call to a URL that includes the type of object you want to create along with a JSON-encoded version of the object attached. For example, if you want to create an app-owned that is a common book object you can make this call:
curl \
-X POST \
"https://graph.facebook.com/app/objects/books.book" \
-F "access_token=$APP_TOKEN" \
-F "object={
\"title\":\"The Hunt for Red October\",
\"image\":\"http://ecx.images-amazon.com/images/I/314leP6WviL._SL500_AA300_.jpg\",
\"url\":\"https://link.you.want.displayed/example/hunt-for-red-october-link\",
\"description\":\"Classic cold war technothriller\",
\"data\": {
\"isbn\":\"425240339\"
}
}
Including your Object Meta Tags
To make a page into an object, you have to include the Open Graph meta tags in the <head> of your page – they contain the values of the properties that each object type contains. Here are some sample meta tags for a Recipe object from our example cookbook app:
<meta property="fb:app_id" content="1234567890" />
<meta property="og:type" content="social-cookbook:recipe" />
<meta property="og:url" content="http://samples.ogp.me/136756249803614" />
<meta property="og:title" content="Chocolate Pecan Pie" />
<meta property="og:image" content="https://fbcdn-dragon-a.akamaihd.net/hphotos-ak-prn1/851565_496755187057665_544240989_n.jpg" />
<meta property="cookbook:author" content="http://samples.ogp.me/390580850990722" /> Apply for Facebook Apps Certification Now!!
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