add_stage: Create or append a mongo aggregation stage
Description
Create or append a mongo aggregation stage
Usage
add_stage(x, ...)# S3 method for default
add_stage(x, ...)
# S3 method for mongopipe
add_stage(x, type, ...)
Value
Object of type mongopipe.
Arguments
- x
Object of class mongo or mongo_pipe
- ...
query
- type
Name of the stage.