问题
We are building a realtime webapp on sails 0.10.5. We have a lot of models linked through associations. For example we have a User model and a Post model, where a post always has one user.
The populate makes sure that when fetching a user, we also get the posts. We tell the (websocket) client about updates using the subscribe and watch model methods in our sails controllers.
However whenever a websocket client is watching both the User model (watch and subscribed to all users) and the Post model (watch). And a new Post gets created (via another socket for example) our client only receives a new event for Post, while the User changed as well (indirectly through an association).
How can we make sure our clients get those updates as well? Basically we need a way to sync the results of any populated model to our clients.
回答1:
I'm not sure if this is the best way to do that but does the work: Basically, anytime you update a Post you can publish a User "update" event.
// Post.js
module.exports = {
attributes: {
title: 'string',
owner:{
model:'user'
}
},
afterUpdate: function(post, cb){
User.publishUpdate(post.owner, {/* props you want to send */});
cb();
}
};
来源：https://stackoverflow.com/questions/27254587/sails-publishupdate-system-does-not-propagate-to-associations