Is it possible to set the new object data depending on the actual element in $addToSet?

[Prasad_Saya]

@Abra_Sata, to update an element in an array, you need to know the value of the element or the field value of the nested document. If you want to know the array element position (e.g., index 4, the fifth element), and use its value in calling another external function, I don’t know if its possible.

The Updates with Aggregation Pipeline feature allows using JavaScript function within an update operation using the $function operator. Maybe you can try using this feature to accommodate your custom function code. Here is a post as an example usage:

Using $replaceOne on arrays

Hello @waldgeist, here is another approach to update the nested array element field. This uses the $function aggregation operator. This operator allows define a custom JavaScript (JS) function (and use it within the aggregation). This requires MongoDB v4.4 or higher. In this case use the JS function to iterate the outer and the inner arrays, and change the uri field value - but, using the JavaScript String#replace method (see String.replace at MDN). The update with aggregation pipeline: db.c…