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• Array Update Operators

Array Update Operators

Update Operators

Name	Description
$	Acts as a placeholder to update the first element that matches the query condition in an update.
$addToSet	Adds elements to an existing array only if they do not already exist in the set.
$pop	Removes the first or last item of an array.
$pullAll	Removes multiple values from an array.
$pull	Removes items from an array that match a query statement.
$pushAll	Deprecated. Adds several items to an array.
$push	Adds an item to an array.

• $ (query)
• $addToSet
• $pop
• $pullAll
• $pull
• $pushAll
• $push

Update Operator Modifiers

Name	Description
$each	Modifies the $push and $addToSet operators to append multiple items for array updates.
$slice	Modifies the $push operator to limit the size of updated arrays.
$sort	Modifies the $push operator to reorder documents stored in an array.

• $each
• $slice
• $sort

• ←   $unset
• $ (query)  →