stripAggregate

stripAggregate is an aggregation function in MongoDB, used to remove one or more fields from the output of an aggregation pipeline. The function takes an object specifying the fields to be stripped from the output, and it can operate on the selected fields of the pipeline documents.

stripAggregate is a last stage pipeline operator, meaning it must appear as the final stage of the aggregation pipeline. It is intended for use when a pipeline generates an output that includes fields not needed for further processing or when the output is to be consumed by an external system. The function works by selectively removing the specified fields from the output, returning an object including only the fields not named in the object passed to the function.

The stripAggregate function takes a single argument, an object specifying the fields to be excluded from the output. This object may include any of the fields present in the output of the aggregation pipeline. If all fields are to be excluded, an empty object can be passed as the argument. The function will also strip away _id field if no argument is passed.

stripAggregate can be significantly useful when building complex aggregation pipelines where intermediate results are not needed for further processing. It can help streamline the code and reduce the need for ad-hoc processing and field handling, making it easier to design and maintain large-scale aggregation pipelines. However, it is essential to ensure that this function is applied in the correct context and stage of the pipeline, as incorrect use may lead to unexpected results or loss of information.