graphql_client

A Ruby GraphQL Client

This is an early stage attempt at a generic GraphQL client in Ruby.

This client offers two APIs:

• Query Builder
• Raw Queries

The Query Builder is considered unstable and should be used with caution.

We recommend start with raw queries since it offers an easy migration path to another API or library. With the raw queries, you are just writing plain GraphQL queries as strings.

Below you'll find some usage examples.

Usage

Create a client:

client = GraphQL::Client.new(Pathname.new('path/to/schema.json')) do
  configure do |c|
    c.url = "https://#{shopify_domain}/admin/api/graphql.json"
    c.read_timeout = 1 # 5 seconds is the default
    c.headers = {
      'X-Shopify-Access-Token' => shopify_token
    }
  end
end

Raw Queries

client.raw_query('
  query {
    shop {
       name
      }
    }
')

Query Builder

query = client.build_query do |q|
  q.add_field('shop') do |shop|
    shop.add_field('name')
  end
end

client.query(query)

More complex query using a connection:

query = client.build_query do |q|
  q.add_field('product', id: 'gid://Product/1') do |product|
    product.add_connection('images', first: 10) do |connection|
      connection.add_field('src')
    end
  end

  q.add_field('shop') do |shop|
    shop.add_field('name')

    shop.add_field('billingAddress') do |billing_address|
      billing_address.add_fields('city', 'country')
    end
  end
end

client.query(query)

Responses

Both query and raw_query methods return a response object that converts the JSON to Ruby objects offering easy method access instead of via a Hash.

Example:

response = client.raw_query('
  query {
    shop {
       name
      }
    }
')

puts response.shop.name

Extensions

The GraphQL specification allows for an extensions key in the response. To access this data use the raw_query_with_extensions method instead. It will return a tuple of response objects, one for the data key and one for the extensions key.

data, extensions = client.raw_query_with_extensions('
  query {
    shop {
       name
      }
    }
')