Automattic/mongoose · error · Error

Collection#watch unimplemented by driver

Error message

Collection#watch unimplemented by driver

What it means

Error "Collection#watch unimplemented by driver" thrown in Automattic/mongoose.

Source

Thrown at lib/collection.js:280

Collection.prototype.deleteMany = function() {
  throw new Error('Collection#deleteMany unimplemented by driver');
};

/**
 * Abstract method that drivers must implement.
 */

Collection.prototype.getIndexes = function() {
  throw new Error('Collection#getIndexes unimplemented by driver');
};

/**
 * Abstract method that drivers must implement.
 */

Collection.prototype.watch = function() {
  throw new Error('Collection#watch unimplemented by driver');
};

/*!
 * ignore
 */

Collection.prototype._shouldBufferCommands = function _shouldBufferCommands() {
  const opts = this.opts;

  if (opts.bufferCommands != null) {
    return opts.bufferCommands;
  }
  if (opts?.schemaUserProvidedOptions?.bufferCommands != null) {
    return opts.schemaUserProvidedOptions.bufferCommands;
  }

  return this.conn._shouldBufferCommands();
};

View on GitHub (pinned to 49cdab0136)

When it happens

Trigger: Thrown at lib/collection.js:280 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/36b9eb43e4d57502. Report an issue: GitHub.