How Do I Define a Global Template Helper Function?

javascript, meteor, meteor-helper, spacebars

Solution

You can register your helpers with handlebars directly. This is what I am using for displaying the current users's email address:

Handlebars.registerHelper('currentUserName', function () {
    var user = Meteor.user();
    if (_.isUndefined(user) || _.isNull(user)) {
        return new Handlebars.SafeString("<i class='icon-spin icon-spinner'></i> Login");
    }
    return user.emails[0].address;
});

In any template I just call `{{currentUserName}}`. For you that'd be

Handlebars.registerHelper('getNodeById', function (id) {
    return collection.find({sid:id}).fetch();
});

As a side note: looking at how you want to use it, you might have gotten the idea of Meteor wrong. Meteor is data-driven - don't try to enforce flow-driven paradigms. If you are missing some data in your templates you should change the data-source, not just fetch it in your templates.

Problem

In many templates I want to use the same functions, but they must defined in every template. like this: ``` function getNodesById(id){ return collection.find({sid:id}).fetch(); } Template.navigation.getNodesById= function(id){ return getNodesById(id); } Template.body.getNodesById= function(id){ return getNodesById(id); } ``` Html: ``` <Template name="navigation"> ... {{#each getNodesById '1'}} ... {{/each}} ... </Template> <Template name="body"> ... {{#each getNodesById '1'}} ... {{/each}} ... </Template> ... <Template name="..."> ..... </Template> ``` Are There any way can defined globle template function instead of a template ? just like it: In javascript: ``` defined global tempele.functionA = function(...){ return ... } ``` in html: ``` <Template name ="a"> {{#each functionA ...}} {{/each }} </Template> <Template name ="b"> {{#each functionA ...}} {{/each }} </Template> <Template name="..."> {{ #.. functionA ...}} .... {{/...}} </Template > ``` Can I do this? I hope I described the problem clearly.

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