Merging resolvers using graphql-tools

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1

I’m using Apollo Server in Next.js. I’ve included graphql-tools and mergeResolvers to merge my resolver files. I’ve got things working with manual imports and declarations like this:

// Manual import of resolvers
import { resolvers as PropertiesResolver } from '@/graphql/resolvers/properties.resolver';
import { resolvers as TestResolver } from '@/graphql/resolvers/test.resolver';

const ScalarResolvers = {
    DateTime: DateTimeResolver,
    ObjectID: ObjectIDResolver,
};

// Manual resolver declaration
const resolvers = mergeResolvers([ScalarResolvers, PropertiesResolver, TestResolver]);

const server = new ApolloServer({
    typeDefs: [DateTimeTypeDefinition, ObjectIDTypeDefinition, typeDefs],
    resolvers: resolvers,
});

export default startServerAndCreateNextHandler(server);

However, I’m looking to automate the import of all resolvers in the resolvers/ directory using LoadFilesSync. I can get this working with just my resolvers but how can I get it to work with custom scalar resolvers (also from graphql-tools):

// Automated import of all resolvers in the resolvers/ directory
const resolversArray = loadFilesSync(path.join(process.cwd(), 'src', 'graphql', 'resolvers'));

const ScalarResolvers = {
    DateTime: DateTimeResolver,
    ObjectID: ObjectIDResolver,
};

// Auto declaration (Not working)
const resolvers = mergeResolvers(ScalarResolvers, resolversArray);

const server = new ApolloServer({
    typeDefs: [DateTimeTypeDefinition, ObjectIDTypeDefinition, typeDefs],
    resolvers: resolvers,
});

export default startServerAndCreateNextHandler(server);

How can I get my custom scalars merged with my other resolvers

2

Don’t know if it will work but try:

// Automated import of all resolvers in the resolvers/ directory
const resolversArray = loadFilesSync(path.join(process.cwd(), 'src', 'graphql', 'resolvers'));

resolversArray.push({
    DateTime: DateTimeResolver,
    ObjectID: ObjectIDResolver,
});

// Auto declaration (Not working)
const resolvers = mergeResolvers(resolversArray);

If I am not mistaken (I haven’t checked), the result of resolversArray is an array of objects. so you would just need to append your ScalarResolvers object to the end or the beginning if you prefer.