Find document from mongoose collections with specific condition-CodePudding

Recently I start using MongoDB with Mongoose on Nodejs.

This code works as it should, and returns me all data i need :

const getAllPosts = async () => {
  try {
    return (await PostModel.find().populate('user')).reverse();
  } catch (error) {
    console.log(error);
    throw Error('Error while getting all posts');
  }
};

But now I only need individual posts, which in the tags (represented as an array in the PostModel) contain the data that I will pass in the request. For example, I will make a GET request to /posts/tag111 and should get all posts that have "tag111" in the tags array.

Any ways to do this?

CodePudding user response：

If you are using expressjs, your route should be something like:

whatever.get('/:tag', postController.getAllPostTagged)

The function you use in your route (called getAllPostTagged above) should be similar to this one, in which you get the path param tag from req:

const postController = {

    getAllPostTagged = async(req, res) => {
        try {
            return (await PostModel.find({tags: req.params.tag}));
        } catch (error) {
            console.log(error);
            throw Error('Error while getting all posts');
        }
    }
}

The key here is to know where the params are obtained (from req.params) .