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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 array only if they do not already exist in the set. |
$pop |
Removes the first or last item of an array. |
$pullAll |
Removes all matching values from an array. |
$pull |
Removes all array elements that match a specified query. |
$pushAll |
Deprecated. Adds several items to an array. |
$push |
Adds an item to an array. |
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. |
$position |
Modifies the $push operator to specify the position in the array to add elements. |