node.js - Mongoose storing the same date and time in the object of array

Question

My mongoose Schema as belows:

     clothes: [{
      _id: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Clothes'
      },
      dateAdded: {
       type: Date,
       default: Date.now
     }
  }],

Now, If I'm pushing any new object into the clothes array within 1 min then it's storing the same date and time.

"clothes" : [ 
    {
        "_id" : ObjectId("5e3bcc9434a40d46e7eb2b25"),
        "dateAdded" : ISODate("2021-01-05T10:50:19.979Z")
    }, 
    {
        "_id" : ObjectId("5c0599f6975b274a7654702a"),
        "dateAdded" : ISODate("2021-01-05T10:50:19.979Z")
    }, 
    {
        "_id" : ObjectId("5d8cce493eb29c6e5af6be07"),
        "dateAdded" : ISODate("2021-01-05T10:50:19.979Z")
    }, 
    {
        "_id" : ObjectId("5db8344a1689662efbc6d816"),
        "dateAdded" : ISODate("2021-01-05T11:02:47.352Z")
    }
]

I really appreciates if you could help me out in this.

Answer 1

I have also experienced this strange behavior.

This is because, you have defined the default value for dateAdded field as Date.now.

Remove the default value and push the new Date() value to the array whenever you are creating an entry.

This should fix the issue.