Thus it will return the same object ID by which we get to know that we can specify a particular hexadecimal value for an individual object ID.Ĭode y = ObjectId(“5bf142459b72e12b2b1b2cd”) In this scenario, we will define an object ID with a hexadecimal value as a parameter of the method.Īs you can observe, in the following image we are defining the value of “y” variable as a predefined object ID. In the above example, it’s just declaring the object ID without any parameter as a method. If you want to define your own unique hexadecimal value then MongoDB will enable you to perform this action. Each time it will return a unique hexadecimal value and when we call only the “x”, it will return the last stored hexadecimal value.įrom this experiment, we get to know that, each time when we call ObjectID, it will reserve a specific location within the virtual memory for a record. In the above image, you can observe that we are declaring an objectID method as a value for “x” variable multiple times. In the below image you can observe that we are declaring a variable having object ID method as a value and it will return unique hexadecimal. In simple words, we can say that object ID is a unique identifier for each record. To create a new objectID manually within the MongoDB you can declare objectId as a method.

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