(node:71307) [DEP0079] DeprecationWarning

Question

Try to update MongoDB document Getting Deprecation Warning as

(node:71307) [DEP0079] DeprecationWarning: Custom inspection function on Objects via .inspect() is deprecated

Node version v10.5.0, db version v3.6.5, Mongoose version mongoose@4.1.12

Campground.findById(campgroundId, function(err, campground){
    if(err){
        console.log(err);
    } else {
        console.log(campground.celebrity);
        Celebrity.create(celebrityData, function(err, celebrity){
            if(err){
                console.log(err);
            } else {
                //save comment
                celebrity.save();
                campground.celebrity.push(celebrity);
                campground.save();
                console.log(celebrity);
                //req.flash('success', 'Created a comment!');
            }
        });
    }
});

Answer 1

You have to not worry about this error this is mongoose warning . Actually Mongoose use inspect() to debug output . they will update it may be before node 12.x . For now it is safe to use this.

Nothing to worry.

Check this info. https://nodejs.org/api/deprecations.html#deprecations_dep0079_custom_inspection_function_on_objects_via_inspect

DEP0079: Custom inspection function on Objects via .inspect()# Type: Runtime

Using a property named inspect on an object to specify a custom inspection function for util.inspect() is deprecated. Use util.inspect.custom instead. For backward compatibility with Node.js prior to version 6.4.0, both may be specified.

If you want more detail, see this . This is under progress. Warning will come in node 10

https://github.com/Automattic/mongoose/issues/6420