To add a number of days to a date field in MongoDB using the aggregation framework, you can use the following code as an example:
<code class="">db.collection.aggregate([ { $addFields: { newDate: { $add: [ "$dateField", 1000 * 60 * 60 * 24 * NUMBER_OF_DAYS ] } } } ])</code>
In this code, $addFields
is the stage in the pipeline that adds a new field to the documents being processed. $add
is used to perform arithmetic operations, and it takes an array of values as arguments, with the first argument being the date field ($dateField
in this example) and the second argument being the number of milliseconds equivalent to the number of days you want to add (1000 * 60 * 60 * 24 * NUMBER_OF_DAYS
).