javascript Meteor，如何从另一个助手访问助手？
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Meteor, how to access to a helper from another helper?
提问by Jonathan de M.
I have a helper like
我有一个像
Template.user_profile.helpers({
user:function() {
return Meteor.users.find({'profile.front_name':Session.get('slug')}).fetch()[0];
}
});
I want to add a helper to the collection which could access the userhelper and compare its _idwith the current user _id, to tell whether the user is visiting its own profile.
I'm using something pretty ugly:
我想向集合中添加一个助手，该助手可以访问该user助手并将其_id与当前用户进行比较_id，以判断用户是否正在访问其自己的个人资料。我正在使用一些非常难看的东西：
Template.user_profile._tmpl_data.helpers.user()
The final code:
最终代码：
Template.user_profile.helpers({
user:function() {
return Meteor.users.find({'profile.front_name':Session.get('userId')}).fetch()[0];
},
isCurrentUser: function() {
return Template.user_profile._tmpl_data.helpers.user()._id === Meteor.userId();
}
});
Is there any better way to access another helper?
有没有更好的方法来访问另一个助手？
回答by outluch
I've just accidentally discovered this in the console:
我只是在控制台中偶然发现了这一点：
Template.registerHelper
function (name, func) {
Blaze._globalHelpers[name] = func;
}
So, Blaze._globalHelpersis what we are looking for!
所以，Blaze._globalHelpers这就是我们要找的！
回答by avalanche1
You can call a template helper (not global helper - which is in outluch's answer) with:
您可以使用以下命令调用模板助手（不是全局助手 - 这是 outluch 的答案）：
Template.tplName.__helpers.get('helper').call()
MDG suggests using a regular function and then passing it to helpers, events and so on. See here.
MDG 建议使用常规函数，然后将其传递给助手、事件等。见这里。
Update 16.06.16
Actually I strongly advise to simply use manuel:viewmodel- it alleviates so many Blaze headaches...
16 年 6 月 16 日更新
实际上我强烈建议简单地使用manuel:viewmodel- 它减轻了许多 Blaze 的头痛......
回答by Fran?ois
As I was searching for a way to call a helper from another helper, I found that Meteor 1.0 defines "Template.registeredHelpers" that are available for all other helpers to use. https://docs.meteor.com/#/full/template_registerhelper
当我正在寻找一种从另一个助手调用助手的方法时，我发现 Meteor 1.0 定义了可供所有其他助手使用的“Template.registeredHelpers”。https://docs.meteor.com/#/full/template_registerhelper
Template.registerHelper("checkedIf",function(value){
return value?"checked":"";
});
回答by Brian Bolton
You might not even need to call a helper like that. There is a currentUser helper already built in.
你甚至可能不需要像那样打电话给帮手。已经内置了一个 currentUser 助手。
http://docs.meteor.com/#template_currentuser
http://docs.meteor.com/#template_currentuser
{{currentUser}}
回答by GeriTol
maybe this would work for you:
也许这对你有用：
//js
Template.foo.helpers({ bar: function() {
return this.userId == Meteor.userId(); },
domain: function() {
var a = document.createElement('a'); a.href = this.url;
return a.hostname;
} });
ownsDocument = function(userId, doc) { return doc && doc.userId === userId;}
Posts = new Meteor.Collection('posts');
Posts.allow({
update: ownsDocument, remove: ownsDocument
});
//html
{{#if bar}}<a href="{{pathFor 'postEdit'}}">Edit</a>{{/if}}
