Each column type in Fuse has built-in transformations available. You refer to the documentation of a specific column type to see the available options.
When the built-in transformations are not enough for you, you can create your own custom data transformations using the formatRecord hook.

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formatRecord(record)

The formatRecord hook is called for every row in the importer. It allows you to auto-format, correct issues, and more. Here are some samples of things you might want to do with this hook:
  • Combine “first_name” and “last_name” into a “full_name” column.
  • Capitalize all of the values in a column.
  • Prepend “https://” to all of the URLs in a column.
The record passed to this hook is an object that represents a single row in the importer. You can access the properties of the record using the internal_key of each column.

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Example

importer.formatRecord = (record) => {
  const newRecord = { ...record };

  // capitalize the first letter in first_name
  if (typeof newRecord.first_name === "string") {
    newRecord.first_name =
      newRecord.first_name.charAt(0).toUpperCase() +
      newRecord.first_name.slice(1);
  }

  return newRecord;
};