polen/build/lib/mutation-type.js

A framework for delightful GraphQL developer portals

export const MutationType = {
    Create: `create`,
    Update: `update`,
    Delete: `delete`,
};
export const getMutationType = (diff) => {
    if (!diff.before && diff.after)
        return MutationType.Create;
    if (diff.before && diff.after)
        return MutationType.Update;
    if (diff.before && !diff.after)
        return MutationType.Delete;
    // TypeScript ensures we handle all cases exhaustively
    throw new Error(`Invalid existence diff: ${JSON.stringify(diff)}`);
};
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