Like many other CMSs, Contentful is an object-based data storage system. Contentful calls objects Content Models. Content models can have fields of several types, such as Short Text, Long Text (Rich Text or Markdown), Number, Boolean, etc. Each record of a particular content model is called an Entry, and content model fields can be of a type that references other content model entries.
A simple example would be if one had a content model called Blog Post, and one called Author. The field Author in Blog Post would reference an entry of content type Author. Reference fields can either reference a single entry or many.
Because I use Contenful primarily with React / Next.JS apps, this tutorial will focus on programmatically creating entries with linked objects using Contentful's Content Management API (CMA) Javscript SDK. I will also assume you are already using Contentful's Delivery API in your React project.
If you don't already have one, you'll need to generate a content management token under API keys in your Contentful settings:
Next, add the following environment variable to your env.local file:
Create Your Library Functions
Now that our environment is setup, we can now create our library functions for managing our content:
The above function creates the JSON entity that CMA expects for linking objects. You simply only need to feed it the entry ID you wish to link and it returns a JSON object.
To see how this works, let's now create a function for adding an entry:
The first function
slugify converts our title into a URL-safe string to use as our slug. You may want to add some logic to check for an existing slug, but it would be unlikely you would publish two posts with the exact same title.
createPost() function, we first instantiate the CMA client, then we pull our Contentful space, then our environment (most likely master). Next we create our entry object and use the
createLinkObject() function to add the user and category. Finally, we execute
createEntry() with the Content Type and Entry object. If we detect a new Entry ID, then all went to plan!
I hope you found this tutorial useful. Contentful is a great general-purpose backend for statically-generated pages and I keep finding new and exciting uses for it.
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