How can I know if the save method worked in mongo - reactjs

Question

im new using mongo and when i save a new object in my db i use the save method, but when using it and then printing the result, if it was successful i get the object, not someting that i can use to handle any error in the front end
router.post("/post_recipe", async (request, response) => {
const {title, content, author} = request.body;
const new_post = new Posts({title, content, author});
new_post.save(sdfs).then((response) => {
response.json(response);
}).catch(error => response.json(error));
});
doing this on purpose i get the error in the console but its not sending it to the front end to handle it and tell the user that there was a problem
Posts its a scheme, dont know if it has something to do with

Answer 1

Problem is you are using same variable name for your router response and save method response.
Solution
router.post("/post_recipe", async (req, res) => {
const {title, content, author} = req.body;
const new_post = new Posts({title, content, author});
// Getting rid of .then and .catch method
new_post.save((err, savedPost) => {
// Your custom error message
if (err) return res.status(400).json('post not saved due to some problem! Please try again');
// Post that you just saved in db
return res.json(savedPost);
});
This happen due to scope of variable.
For more detail check this article from w3schools.com