I have a set of routes on my server for retrieving post information and media:
// Retrieve post information (description and tags)
router.get('/:post_id/information', function(req, res) {
User.findById(req.params.post_id)
.select('data.title.text tags')
.exec(function(req, post) {
res.json(post);
});
});
// Retrieve post media object
router.get('/:post_id/media', function(req, res) {
User.findById(req.params.post_id)
.select('data.media')
.exec(function(req, post) {
res.json(post);
});
});
I wanted to create a callback trigger for the route parameter post_id:
// Handle 'post_id' parameter - executed for every route
router.param('post_id', function(req, res, next, post_id) {
Post.findById(post_id, function (err, post){
if(err) { throw err; }
// If no post is found
if(!post) {
return res.status(404).send({ message: { post: 'There is no such post.'} });
// Something went wrong! The requested post does not exist.
}
req.post = post;
return next();
});
});
After executing this callback trigger, I needed to continue with different queries based on the route. Is there a way to achieve this? I initially tried using req.post instead of User.findById(), but that didn't work as expected since req.post stores the result from the initial query.