'TypeError: meme.find(...).forEach is not a function' in mongoose node js?

Question

I want to loop through my collection in MongoDB so I tried .forEach to perform the action but it looks like this is not the right approach. Everytime I tried running it gives me error: TypeError: meme.find(...).forEach is not a function

This is my code:

var meme = require('../app/model/meme');

meme.find().forEach(function(meme){
   meme.update({_id: meme._id}, {$set: { objectID: meme._id.toString().slice(10).slice(0,24)}}); 
});

I'm using mongoose and node.js to perform the action.

I'd appreciate any help to solve this problem.

Thanks.

Answer 1

You're using an async method find so you should use promises or callback to get the result , here some solutions choose what you want

// using promises

meme.find().then((memes) => {
  memes.forEach((meme) => {
    console.log(meme);
  });
});

// using callbacks

meme.find({}, (err, memes) => {
  memes.forEach((meme) => {
    console.log(meme);
  });
});

// using exec

meme.find().exec((err, memes) => {
  memes.forEach((meme) => {
    console.log(meme);
  });
});