graphql-add-id-document-transform/dist/index.js

GraphQL document transform ensuring cache normalization by adding an `id` field if available

// src/addIdDocumentTransform.ts
import {
  Kind,
  TypeInfo,
  buildASTSchema,
  isObjectType,
  visit,
  visitWithTypeInfo
} from "graphql";
var addIdDocumentTransform = {
  transform: ({
    schema: astSchema,
    documents
  }) => {
    const schema = buildASTSchema(astSchema);
    const typeInfo = new TypeInfo(schema);
    return documents.map((documentFile) => {
      if (!documentFile.document) {
        return documentFile;
      }
      documentFile.document = visit(
        documentFile.document,
        visitWithTypeInfo(typeInfo, {
          SelectionSet(node) {
            const parentType = typeInfo.getParentType();
            if (isObjectType(parentType)) {
              const fields = parentType.getFields();
              const selectionHasIdField = node.selections.some(
                (selection) => selection.kind === Kind.FIELD && selection.name.value === "id"
              );
              if ("id" in fields && !selectionHasIdField) {
                node.selections = [
                  ...node.selections,
                  {
                    kind: Kind.FIELD,
                    name: { kind: Kind.NAME, value: "id" }
                  }
                ];
              }
            }
            return node;
          }
        })
      );
      return documentFile;
    });
  }
};
export {
  addIdDocumentTransform
};