Automattic/mongoose · error · Error

Must provide an update object.

Error message

Must provide an update object.

What it means

Error "Must provide an update object." thrown in Automattic/mongoose.

Source

Thrown at lib/helpers/model/castBulkWrite.js:111

  if (versionKey && doc[versionKey] == null) {
    doc[versionKey] = 0;
  }
  insertOne['document'] = doc;

  if (options.skipValidation || insertOne.skipValidation) {
    return insertOne;
  }

  await insertOne['document'].$validate();
  return insertOne;
};

module.exports.castUpdateOne = function castUpdateOne(originalModel, updateOne, options, now) {
  if (!updateOne['filter']) {
    throw new Error('Must provide a filter object.');
  }
  if (!updateOne['update']) {
    throw new Error('Must provide an update object.');
  }

  const model = decideModelByObject(originalModel, updateOne['filter']);
  const schema = model.schema;
  const strict = options.strict ?? model.schema.options.strict;

  const update = clone(updateOne['update']);

  _addDiscriminatorToObject(schema, updateOne['filter']);

  const doInitTimestamps = getTimestampsOpt(updateOne, options);

  if (model.schema.$timestamps != null && doInitTimestamps) {
    const createdAt = model.schema.$timestamps.createdAt;
    const updatedAt = model.schema.$timestamps.updatedAt;
    applyTimestampsToUpdate(now, createdAt, updatedAt, update, {
      timestamps: updateOne.timestamps,
      overwriteImmutable: updateOne.overwriteImmutable

View on GitHub (pinned to 49cdab0136)

When it happens

Trigger: Thrown at lib/helpers/model/castBulkWrite.js:111 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Automattic/mongoose@49cdab0136 (2026-08-21). Data as JSON: /api/errors/457ce8406cdfca88. Report an issue: GitHub.