graphql-field-mask

graphql-field-mask

google.protobuf.FieldMask from GraphQL query

Usage

import { FieldMask } from "google-protobuf/google/protobuf/field_mask_pb";
import { fieldMaskPathsFromResolveInfo } from "graphql-field-mask";

const queryType = new GraphQLObjectType({
  name: "Query",
  fields: {
    viewer: {
      type: User,
      resolve(_source, _args, ctx, info) {
        const paths = fieldMaskPathsFromResolveInfo("User", info);
        const mask = new FieldMask().setPathsList(paths);

        // ...
      }
    }
  }
})

Convert to snake case

import { snakeCase } from "change-case";
import { fieldMaskPathsFromResolveInfo, GetFieldNameFunc } from "graphql-field-mask";

const getFieldName: GetFieldNameFunc = (field, _type, _schema) => snakeCase(field.name);

resolve(_source, _args, ctx, info) {
  const paths = fieldMaskPathsFromResolveInfo("User", info, { getFieldName });
  const mask = new FieldMask().setPathsList(paths);

  // ...
}

With ProtoNexus

import { ProtobufFieldExtensions, ProtobufMessageExtensions, ProtobufOneofExtensions } from "proto-nexus";
import { fieldMaskPathsFromResolveInfo, GetFieldNameFunc } from "graphql-field-mask";

const getFieldName: GetFieldNameFunc = (field, _type, _schema) => {
  const ext = (field.extensions ?? {}) as Partial<ProtobufFieldExtensions>;
  return ext.protobufField?.name  ?? null;
};

const getAbstractTypeFieldMaskPaths: GetAbstractTypeFieldMaskPathsFunc = (info, getFieldMaskPaths) => {
  const oneofExt = (info.abstractType.extensions ?? {}) as Partial<ProtobufOneofExtensions>;
  const objExt = (info.concreteType.extensions ?? {}) as Partial<ProtobufMessageExtensions>;
  const prefix = (oneofExt.protobufOneof.fields ?? []).find(f => f.type === objExt.protobufMessage?.fullName)?.name;
  return prefix ? getFieldMaskPaths().map(p => `${prefix}.${p}`) : []
}

resolve(_source, _args, ctx, info) {
  const paths = fieldMaskPathsFromResolveInfo("User", info, { getFieldName, getAbstractTypeFieldMaskPaths });
  const mask = new FieldMask().setPathsList(paths);

  // ...
}

Changelog

v0.1.1

What's Changed

Enhancements 🚀

• Support abstract types by @izumin5210 in https://github.com/proto-graphql/graphql-field-mask/pull/5

Full Changelog: https://github.com/proto-graphql/graphql-field-mask/compare/v0.1.0...v0.1.1