How to access FlowRouter subscriptions in Meteor template helpers?

问题

it seems like I can't access a FlowRouter template subscription in my helper. How can you do this?

In my server code:

Meteor.publish('AllUsers', function() {
    return Meteor.users.find({}, {fields: {profile: 1}});
})

In my router code:

var userRoutes = FlowRouter.group({
    subscriptions: function(params, queryParams) {
        this.register('AllUsers', Meteor.subscribe('AllUsers'));
    },
});

In my template code:

{{#if checkFlowRouterSubs}}
    {{#each getTheUsers}}
        {{>userPartial}}
    {{/each}}
{{/if}}

In my helpers I have the 'guard':

checkFlowRouterSubs: function() {
    if (FlowRouter.subsReady()) {
        return true;
    };
    return false;
},

And then the getTheUsers helper:

...
var users = AllUsers.find(filterObject, { sort: { 'profile.firstname': 1 } }).fetch(); // the actual query definitely works
...

But I get an error:

Exception in template helper: ReferenceError: AllUsers is not defined

I should note that in the getTheUsers helper, FlowRouter.subsReady('AllUsers') returns true

回答1:

so, first, this :

var userRoutes = FlowRouter.group({
    subscriptions: function(params, queryParams) {
        this.register('AllUsers', Meteor.subscribe('AllUsers'));
    },
});

is NOT server code: it is Client code: the Flow-router is a client side router: counter intuitive but this is the basis of all these routers. The hint here is that you are 'subscribing' to the publication in this code, so it is on the client side.

Iron-Router is routing both on the server and client-side so it makes things even more confusing when you come from there.

What you are missing here is the publish function on the server side.

Meteor.publish('AllUsers', function() {
    return AllUsers.find();
});

EDIT:

The Error

Exception in template helper: ReferenceError: AllUsers is not defined seems like because you did not define the collection on the client side

var AllUsers = Mongo.Collection('AllUsers'); //or whatever the actual collection

回答2:

When you try to get data from a subscription, you want to call the actual collection you're looking to get data for, not the subscription name. In this case, I think you mean Meteor.users:

var users = Meteor.users.find(filterObject, { sort: { 'profile.firstname': 1 } });
if( users ) {
  return users.fetch();
}

来源：https://stackoverflow.com/questions/35816221/how-to-access-flowrouter-subscriptions-in-meteor-template-helpers

标签

meteor

meteor-blaze

flow-router