Module "operators/pipeline/lookup"

$lookup

• $lookup(collection: Iterator, expr: { as: string; foreignField: string; from: string | Collection; localField: string }, options?: Options): Iterator

• Performs a left outer join to another collection in the same database to filter in documents from the “joined” collection for processing.

  Parameters

  • collection: Iterator

  • expr: { as: string; foreignField: string; from: string | Collection; localField: string }

    • as: string

    • foreignField: string

    • from: string | Collection

    • localField: string

  • Optional options: Options

  Returns Iterator