ObjectId

Description

ObjectId()
Returns a new ObjectId value. The 12-byte ObjectIdvalue consists of:
- a 4-byte value representing the seconds since the Unix epoch,
- a 5-byte random value, and
- a 3-byte counter, starting with a random value.ObjectId() can accept the following parameter:

FieldTypeDescriptionhexadecimalStringOptional. Hexadecimal string value for the new ObjectId.

ObjectId() has the following attribute and methods:

Attribute/Method	Description
`str`	Returns the hexadecimal string representation of the object.
`ObjectId.getTimestamp()`	Returns the timestamp portion of the object as a Date.
`ObjectId.toString()`	Returns the JavaScript representation in the form of a stringliteral “`ObjectId(…)`”.
`ObjectId.valueOf()`	Returns the representation of the object as a hexadecimalstring. The returned string is the `str` attribute.

To generate a new ObjectId, use ObjectId() with no argument:

x = ObjectId()

In this example, the value of x would be:

ObjectId("507f1f77bcf86cd799439011")

To generate a new ObjectId using ObjectId() with a uniquehexadecimal string:

y = ObjectId("507f191e810c19729de860ea")

In this example, the value of y would be:

ObjectId("507f191e810c19729de860ea")

Access the str attribute of an ObjectId() object, as follows:

ObjectId("507f191e810c19729de860ea").str

This operation will return the following hexadecimal string:

507f191e810c19729de860ea