Get Started with Ruby SDK

This guide will help you get started with Contentstack Ruby SDK to build apps powered by Contentstack.

Prerequisites

Ruby v2.0 or later

SDK Installation and Setup

Contentstack offers three regions: North America, Europe, and Azure North America as data centers to store customers' account details and data. These regions are independent of each other and therefore have a dedicated set of instructions to use SDKs offered by Contentstack.

To use SDKs for the Europe and Azure NA region, you will have to make certain changes in the configuration of the SDK, as detailed below, and the rest of the instructions remain the same.

To use the Ruby SDK, download it using the gem install command:

$ gem install contentstack

Let's get started with the implementation.

Initialize SDK

To initialize the SDK, You will need to specify the stack’s API key, delivery token, and name of the environment where you will publish the content.

@stack = Contentstack::Client.new("site_api_key", "delivery_token", "enviroment_name")

Note: By default, the SDK uses the North American region. Configuration changes are not required for North American region users.

For Europe or Azure North America, check the code of your region and configure your SDK.

Once you have initialized the SDK, you can query entries to fetch the required content.

For Setting the branch for Europe or Azure North America, check the code of your region and initialize SDK in a particular branch.

Basic Queries

Contentstack SDKs let you interact with the Content Delivery APIs and retrieve content from Contentstack. They are read-only in nature. The SDKs fetch and deliver content from the nearest server via Fastly, our powerful and robust CDN.

Get a Single Entry

To get a single entry, specify the content type as well as the uid of the entry:

entry = @stack.content_type('content_type_uid').entry("entry_uid").fetch()
puts entry.get('title') # Use `get` method to retrieve field value by providing a field's unique ID

Get Multiple Entries

To retrieve multiple entries of a content type, specify the content type UID. You can also specify search parameters to filter results:

@query = @stack.content_type('blog').query
@entries = @query.where('title', 'welcome')
                 .include_schema
                 .include_count
                 .fetch
puts "Total Entries -- #{@entries.count}"
@entries.each{|entry| puts "#{entry.get('title')}" }

To retrieve localized versions of entries, you can use the query attribute:

entry = @stack.content_type('content_type_uid').query.locale('locale_code').fetch()

Note: Currently, the above query works in case of retrieving localized versions of multiple entries only.

These were examples of some of the basic queries of the SDK. For advanced queries, refer to Contentstack Ruby API reference.

Note: Currently, the Ruby SDK does not support multiple content types referencing in a single query. For more information on how to query entries and assets, refer the Queries section of our Content Delivery API documentation.

Paginating Responses

In a single instance, the Get Multiple Entries query will retrieve only the first 100 items of the specified content type. You can paginate and retrieve the rest of the items in batches using the skip and limit parameters in subsequent requests.

@stack = Contentstack::Client.new("site_api_key", "delivery_token", "environment")
@entries = @stack.content_type('category').query
                   .limit(20)
                   .skip(50)
                   .fetch

Limitations

We have a URL size limitation of 8KB on API Requests that hit our CDN services. Any Request URL that goes above this size limit will receive the 400 - Bad request error response. Please make sure you limit the size of your API Requests.
The Ruby SDK does not support multiple content types referencing in a single query.
Currently, the Ruby SDK does not yet support querying Global Field schemas (All Global Fields and Single Global Field). You can include these details when querying content type details (All Content Types and Single Content Type) with the include_global_field_schema query parameter.