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Cursor Methods

cursor.forEach()

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  • Definition
  • Syntax
  • Method Fields
  • Examples
  • Learn More

Definition

cursor.forEach(function)

Important

mongo Shell Method

This page documents the mongo shell method, and does not refer to the MongoDB Node.js driver (or any other driver) method. For corresponding MongoDB driver API, refer to your specific MongoDB driver documentation instead.

Iterates the cursor to apply a JavaScript function to each document from the cursor.

Syntax

The method has the following syntax:

db.collection.find().forEach( <function> )

Method Fields

The method accepts the following field:

Field
Type
Description
function
JavaScript code
Function to apply to each document returned from the cursor. The function signature includes one field that stores the current document that is read from the cursor.

Examples

Create the users collection:

db.users.insertMany( [
   { name: "John" },
   { name: "Jane" }
] )

The following example uses forEach() with the find() method to print the user names that are read from the users collection. myDoc stores the current document.

db.users.find().forEach( function( myDoc ) {
   print( "User name: " + myDoc.name )
} )

Example output:

User name: John
User name: Jane

Starting in mongosh 2.1.0, you can also use for-of loops. The following example returns the same results as the previous example:

for ( const myDoc of db.users.find() ) {
   print( "User name: " + myDoc.name )
}

Learn More

For a method that has similar functionality, see cursor.map().

Back

cursor.explain()

Next

cursor.hasNext()