a.js

// post hooks for inserMany
  schema.post<MovieDocument[]>('insertMany', async function (docs, next) {
    console.log('docs POST =', docs);
    
    if (Array.isArray(docs) && docs.length) {
      const correctData = docs.map((singleDoc) => {
        console.log('singelDoc post before added =', JSON.stringify(singleDoc));
        
        // If id AND name are present, then we can use them to generate the sort_name
        if (singleDoc.id?.length > 0 && singleDoc.name) {
          singleDoc.sort_name = generateSortName(singleDoc.name, singleDoc.id);
        } else {
          // Otherwise set sort_name to null (potentially clearing out an existing value)
          singleDoc.sort_name = null;
        }
    
        // If id AND name AND releaseDate are present, then we can use them to generate the sortReleaseName
        if (singleDoc.id?.length > 0 && singleDoc.name && singleDoc.releaseDate) {
          singleDoc.sortReleaseDate = generateSortReleaseDate(singleDoc.releaseDate, singleDoc.sort_name, singleDoc.id);
        } else {
          // Otherwise set sortReleaseDate to null (potentially clearing out an existing value)
          singleDoc.sortReleaseDate = null;
        }
    
        // If id AND rating are present, then we can use them to generate the sortRating
        if (singleDoc.id?.length > 0 && singleDoc.rating) {
          singleDoc.sortRating = generateSortRating(singleDoc.rating, singleDoc.id);
        } else {
          // Otherwise set sortRating to null (potentially clearing out an existing value)
          singleDoc.sortRating = null;
        }
        console.log('singelDoc post after added =', JSON.stringify(singleDoc));
        // singleDoc.save();
        return singleDoc;