Create a button that DELETES an item from MongoDB (Mongoose Node.js express.js)

Question

I have a CRUD project where a user can insert data with forms and it's all stored in mongoDB. Everything seems to work fine but I can't find a solution on how to create a button that deletes a specific item from a DB.

//Code for Delete button (which is within the article when you click on it)

<form action="/delete/:id" method="post">
<button type='submit' class="btn btn-lg">Delete</button>
</form>

//This is my solution so far

app.post('/delete/:id', (req, res) => {
  Post.deleteOne((err) => {
    if (!err) {
      res.redirect('/')
    }
  })
});

So the problem is when I click Delete, it deletes the first item from the DB. I need it to delete the page where I clicked the button on.

before Delete ||| after Delete

It does not deliver the ID received as params to MongoDB. Add a filter to the first parameter of deleteOne. — k22pr
– k22pr, Commented Feb 14, 2022 at 10:40
Do this Post.deleteOne({_id: req.params.id}, (err) => { ... — Hussam
– Hussam, Commented Feb 14, 2022 at 10:43

sina-heisenberg · Accepted Answer · 2022-02-14 11:46:57Z

1

First things first, check if a provided ID is the actual object ID then you must pass that ID into the command:

app.post('/delete/:id', async (req, res) => {
  await Post.deleteOne({_id: req.params.id})
  return res.redirect('/')
});

answered Feb 14, 2022 at 11:46

sina-heisenberg

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5 Comments

sina-heisenberg Over a year ago

Could you please mark it as accepted?

prasad_ Over a year ago

For delete HTTP requests use app.delete(...).

karina ivanova Over a year ago

I get this error here..

const castError = new CastError();                     ^  CastError: Cast to ObjectId failed for value ":id" (type string) at path "_id" for model "Post"

karina ivanova Over a year ago

if you could, please take a look at my code. Maybe you'll see what I'm doing wrong. Thanks in advance! github.com/karina4840/daily-journal-site-4840

sina-heisenberg Over a year ago

This error happens if the provided ID is not valid object ID please validate that using this method: var ObjectId = require('mongoose').Types.ObjectId; ObjectId.isValid(<PASS YOU ID HERE>);

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