I'm saving a document into a mongodb collection and upon success im returning the document.

ie:

ProductHistory.findOneAndUpdate(
        {productId: product._id},
        $push: {'history': historyData },
        {upsert: true, new: true})
.exec((err, success) => {
    if (err){
         console.log('Error: ', err)        
    }
    console.log('success is: ', success)
}

The result is successfully saved entry and a console logged object which looks like the following:

{
    _id: 616eb07b1e7edf6e9b035707,
    history: [
            {
                    _id: 61b7cdb160854a0564c15f25,
                    value: 114.5,
            },
            //...repeated objects x times
    ]
}

The problem is I want to access history so I can perform a forEach on it but I'm having trouble selecting it.

If i do console.log('success is:' , success.history) it returns undefined.

Likewise if i do success.history.map(). I've also tried destructing is using:

const {history} = success

I just can't seem to grab that array for some reason! any ideas please?

Thanks

CodePudding user response：

Without viewing your Mongoose schema, I can't say for certain. However, more than likely you haven't added the history array type to your schema.

Solutions

1. Add this array to your schema (preferred method).
2. You should be able to bypass the schema by accessing success._doc object. This is not recommended and should only be used for testing and whatnot during development.