How to handle this kind of not found error in iron-router? - meteor

Question

For example, I have a Posts collection, which has userId indicates this post belongs to whom.
And I have a route like this:
Router.route('/:username/posts', {
waitOn: function(){
return Meteor.subscribe('posts', username); // A
// var user = Meteor.users.find({username: username}); //B
// if(user) {
// return Meteor.subscribe('posts', user._id);
// } else {
// return null; // ???
// }
}
});
And publish
Meteor.publish("posts", function(userId){ // C
check(userId, String);
return Posts.find({userId: userId});
});
Meteor.publish("posts", function(username){ // D
check(username, String);
if(user) {
return Posts.find({userId: user._id});
} else {
return null; // ???
}
});
I'm confused how to handle like GET /notexistusername/posts ??

Answer 1

You can configure a notFoundTemplate for iron-router either globally or on a per-route basis.
Globally:
Router.configure({
layoutTemplate: 'layout',
notFoundTemplate: 'notFound',
loadingTemplate: 'loading'
});
In a specific route (also I've cleaned up your route code):
Router.route('/:username/posts', {
notFoundTemplate: 'notFound',
data: function(){
var userId = Meteor.users.find({ username: this.params.username })._id;
return Posts.find({ userId: userId });
},
waitOn: function(){
var userId = Meteor.users.find({ username: this.params.username })._id;
return Meteor.subscribe('posts', userId);
}
});
Your notFound template would typically be your 404 page.
Also you can simplify your publication to:
Meteor.publish("posts", function(username){
check(username, String);
return Posts.find({username: username});
});
Since if there are no matches the find will return a null cursor and that will tell the route there's no data.