Rename Fields
Renames one or more fields from the input documents. Keeps the field meta of the existing field(s).
note
This could re-order the fields, placing the renamed fields at the end.
Stage as JSON
For convenience there are two ways to declare this stage:
As an object (with keys and values)
{
$renameFields: {
"q10r1": "q10r01_new_name",
"q10r2": "q10r02_new_name",
}
}
As an array (with keys and values)
{
$renameFields: [
{ from: "q10r1", to: "q10r01" },
{ from: "q10r2", to: "q10r02" },
]
}