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- Array Update Operators
Array Update Operators¶
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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. |
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