ObjectScalar/JsonScalar types in POJO and schema

[neerajsu]

How do I add custom json scalar value for one of the attributes(copy) inside a type.

this project https://github.com/graphql-java/graphql-java-extended-scalars supports extended scalar types. I was wondering how to incorporate that. Do you guys expose RunTimeWiring? or if I create a RunTimeWiring bean in a config file, do you pick it up?

The copy attribute value returning from the process code is a basically a List<Map<String,Object>>. I have no need to drill down into the values under copy from a query perspective. I just want to return the value as a json value as it would in restAPI.

Following is my code below. Let me know if I'm missing something, because I'm brand new to graphql and just started today. Moving a service from REST api into this.

Please look at the attention comments inside the code where I'm in need of help. I'm unable to highlight inside code.

Here's my Resolver

@Component
public class CopyJobResolver implements GraphQLQueryResolver {

    private GetCopyJobProcess getCopyJobProcess;

    @Autowired
    public CopyJobResolver(GetCopyJobProcess getCopyJobProcess) {
        this.getCopyJobProcess = getCopyJobProcess;
    }

    @Trace
    public CopyJob getCopyJob(String id) {
        CopJobFromProcess copyJob = getCopyJobProcess.getJob(id);
        return CopyJob.builder()
                .id(copyJob.getId())
                .name(copyJob.getName())
                .jobAssets(copyJob.getJobAssets()
                        .stream()
                        .map(jobAsset -> CopyJob.JobAsset.builder()
                                .jobAssetIdentifier(jobAsset.getJobAssetIdentifier())
                                .initialGlobalSeason(jobAsset.getInitialGlobalSeason())
                                //***************ATTENTION*******************//
                                 // this getCopy returns a List<Map<String,Object>>. So this assignment will fail
                                .copy(jobAsset.getCopy())
                                .build())
                        .collect(Collectors.toList())
                )
                .build();
    }

}

Here's my schema

type CopyJob {
    id: String!
    name: String!
    jobAssets: [JobAsset]
}

type JobAsset {
    jobAssetIdentifier: String!
    initialGlobalSeason: String!
## ***************ATTENTION*******************
    copy: ObjectScalar!

}

## ***************ATTENTION*******************
scalar ObjectScalar

type Query {
    getCopyJob(id: String!) : CopyJob
}

Here's my GraphQL model POJO

@Builder
@AllArgsConstructor
@NoArgsConstructor
@Data
public class CopyJob {
    private String id;
    private String name;
    private List<JobAsset> jobAssets;

    @Builder
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class JobAsset {
        private String jobAssetIdentifier;
        private String initialGlobalSeason;
       //***************ATTENTION*******************//
        JsonScalar copy; // want to add jsonScalar. This is probably not the way I assume
    }
}

Also if you have another way to solve this problem, please let me know.

[neerajsu]

Nevermind I figured out the problem myself.

I had to just add the following bean inside a configuration file

@Bean
public GraphQLScalarType jsonScalar() {
        return ExtendedScalars.Json;
}

ExtendedScalars is taken from this project --> https://github.com/graphql-java/graphql-java-extended-scalars

Then make the following changes to the .graphqls file

type CopyJob {
    id: String!
    name: String!
    jobAssets: [JobAsset]
}

type JobAsset {
    jobAssetIdentifier: String!
    initialGlobalSeason: String!
    copy: JSON!

}

scalar JSON

type Query {
    getCopyJob(id: String!) : CopyJob
}

Changes to graphql pojo

@Builder
@AllArgsConstructor
@NoArgsConstructor
@Data
public class CopyJob {
    private String id;
    private String name;
    private List<JobAsset> jobAssets;

    @Builder
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class JobAsset {
        private String jobAssetIdentifier;
        private String initialGlobalSeason;
        List<Map<String,Object> copy; 
    }
}

And everything worked.

For those who stumbled upon the same problem, but with a different data type, just create your own GraphQLScalarType bean. You can look at how this guy has created a GraphQLScalarType for date and do a similar thing for your own data type.

You can create as many beans of GraphQLScalarType and they will be automatically pulled in during autoconfiguration and used for parsing your schema.