Class: updateOperators

Members

<static> $dec

Decrements a field by the amount you specify. It takes the form `{ $dec: { field1: amount }`

Example

var probe = require("documents/probe");
probe.update( obj, {'name.last' : 'Owen', 'name.first' : 'LeRoy'},
{$dec : {'password.changes' : 2}} );

<static> $inc

Increments a field by the amount you specify. It takes the form `{ $inc: { field1: amount } }`

Example

var probe = require("documents/probe");
probe.update( obj, {'name.last' : 'Owen', 'name.first' : 'LeRoy'},
{$inc : {'password.changes' : 2}} );

<static> $pop

The $pop operator removes the first or last element of an array. Pass $pop a value of 1 to remove the last element in an array and a value of -1 to remove the first element of an array. This will only work on arrays. Syntax: `{ $pop: { field: 1 } }` or `{ $pop: { field: -1 } }`

Example

var probe = require("documents/probe");
// attr is the name of the array field
probe.update( data, {_id : '511d18827da2b88b09000133'}, {$pop : {attr : 1}} );

<static> $pull

The $pull operator removes all instances of a value from an existing array. It looks like this: `{ $pull: { field: } }`

Example

var probe = require("documents/probe");
// attr is the name of the array field
probe.update( data, {'email' : 'EWallace.43@fauxprisons.com'},
{$pull : {attr : {"color" : "green"}}} );

<static> $push

The $push operator appends a specified value to an array. It looks like this: `{ $push: { : } }`

Example

var probe = require("documents/probe");
// attr is the name of the array field
probe.update( data, {_id : '511d18827da2b88b09000133'},
{$push : {attr : {"hand" : "new", "color" : "new"}}} );

<static> $unset

Removes the field from the object. It takes the form `{ $unset: { field1: "" } }`

Example

var probe = require("documents/probe");
probe.update( data, {'name.first' : 'Yogi'}, {$unset : {'name.first' : ''}} );