Indexes

Database indexes are a way to optimize the performance of your database by allowing it to quickly locate and retrieve data. If you have a field that you frequently query or sort by, adding an index to that field can significantly improve the speed of those operations.

When your query runs, the database will not scan the entire document to find that one field, but will instead use the index to quickly locate the data.

To index a field, set the index option to true in your field's config:

In addition to indexing single fields, you can also create compound indexes that index multiple fields together. This can be useful for optimizing queries that filter or sort by multiple fields.

To create a compound index, use the indexes option in your Collection Config:

When you set index: true or unique: true on a localized field, MongoDB creates one index per locale path (e.g., slug.en, slug.da-dk, etc.). With many locales and indexed fields, this can quickly approach MongoDB's per-collection index limit.

If you know you'll query specifically by a locale, you can insert a custom MongoDB index for the locale path manually or with a migration script.