NodeJS mongoose passing in an array of id

Question

I am not sure how to pass in an array of IDs into Product.find(). This is basically what I have done in the NodeJS. I am able to get the data from the console log(category) and returned the _id and title. But when I tried console.log(category._id), it returned undefined. What I want to achieve is to pass the _id into the product.find with an $in operator: Product.find({catid:{$in:category.id}}) but is not working, and I am not sure how to? Greatly appreciate for any helps and many thanks in advance. Thanks again

let category  = [] 
const category  = users.category
    
console.log(category) // [{"_id":"5feb2122a8632e0550deb43b","title":"A"},{"_id":"5fedef35259fd41fec38bc70","title":"B"},{"_id":"5ff14b9ba012a42238acdcd3","title":"C"}]  
console.log(category._id) //undefined  

Product.find({catid:{$in:category.id}})

turivishal · Accepted Answer · 2021-01-05 15:15:26Z

1

The category is an array, try map() to extract array of _id

const category = users.category.map(({ _id }) => _id);
Product.find({ catid: { $in: category } });

answered Jan 5, 2021 at 15:15

turivishal

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