db.eval()¶

Definition定义¶

db.eval(function, arguments)¶

Deprecated since version 3.0.

Important

Starting in version 4.2, MongoDB removes the eval command. The deprecated db.eval(), which wraps the eval command, can only be run against MongoDB 4.0 or earlier versions. For behavior and example, refer to the 4.0 or earlier version of the manual.

Provides the ability to run JavaScript code on the MongoDB server.

The method accepts the following parameters:

Parameter参数	Type类型	Description描述
function	function	A JavaScript function to execute.
arguments	list	Optional.可选。A list of arguments to pass to the JavaScript function. Omit if the function does not take arguments.

The JavaScript function need not take any arguments, as in the first example, or may optionally take arguments as in the second:

function () {
  // ...
}

function (arg1, arg2) {
   // ...
}