Query circular attribute in graphql

Question

I have the following scheme

type Product {
   code: ID!
   services: [ServiceGroup]
}

type ServiceGroup {
   code: String!
   options: [ServiceItem]
}

type ServiceItem {
   itemName: String!
   groups: [ServiceGroup]
}

Now in the client, how can I query a product and its services considering that groups is nested with more groups.

gql`
 query getProduct($code: ID!) { 
     product(code: $code) {
        code
        services {
           code
           options {
               itemName
               groups {
                  code
                  options {
                    ....
                  }
                }
            }
        }
     }
  }
`
              

Answer 1

The problem is that gql does not allow the nesting of recursive fragments. In the provided example you have a circular dependency which gql cannot handle. The article provided shows an approach with a finite recursive depth.

• Workarounds would be to fetch only identifies such as code or itemName and refetching those objects when needed.
• If the entire structure is needed as one object you might consider to fetch the structure as a JSON object (encoded as String) and parsing it locally. Using this method is not type safe!

Answer 2

The query would have to be dynamically written in the client based on what the depth is. You could have another query field that returns this.