We help IT Professionals succeed at work.
Get Started

Why does this work?

Bruce Gust
Bruce Gust asked
on
116 Views
Last Modified: 2019-12-16
Here's my code:

exports.deletePost = (req, res, next) => {
  const postId = req.params.postId;
  Post.findById(postId)
    .then(post => {
      if (!post) {
        const error = new Error("Could not find post.");
        error.statusCode = 404;
        throw error;
      }
      //check login user
      clearImage(post.imageUrl);
      return Post.findByIdAndRemove(postId);
    })
    .then(result => {
      console.log(result);
      res.status(200).json({ message: "Deleted post!" });
    })
    .catch(err => {
      if (!err.statusCode) {
        err.statusCode = 500;
      }
      next(err);
    });
};

Open in new window


Line #12, it says return Post.findByIdAndRemove(postId).

I was always under the impression that once you invoke the "return" dynamic, you're exiting the flow of the code at that point. Yet, in this case, it proceeds to the next "then" clause.

Why?

The code works, but I want to know why the continues to the next "then" clause despite the fact that there's a "return" dynamic in place.
Comment
Watch Question
CERTIFIED EXPERT
Most Valuable Expert 2020
Most Valuable Expert 2018
Commented:
This problem has been solved!
Unlock 2 Answers and 6 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE