I have two template with tables
<template name="table1">
<table>...</table>
</template>
and
<template name="table2">
<table>...</table>
</template>
I want to populate both template with the same variable but still have them separated in two different templates.
It would be easy to create a helper for a template if I had both tables in the same template as:
<template name="bothTables">
<table>...</table>
<table>...</table>
</template>
I guess I should create a helper for both templates but have the logic to the variable somewhere else. Where should I locate the file with the function that creates the value of the variable which I want to populate to both templates?
Option one :
Defines a helper function which can be used from all templates.
http://docs.meteor.com/#/full/template_registerhelper
Example :
1) create a file in client/lib/helpers.js
2) helper.js
Template.registerHelper('globalHelper', function(id) {
if(Meteor.userId() === id)
return "Yes";
else
return "No";
});
3) In your templates :
<template name="table1">
<table>{{globalHelper '123'}}</table>
</template>
<template name="table2">
<table>{{globalHelper '123'}}</table>
</template>
Option two :
If you want to populate the tables with the same content, you can pass the context of the parent template to the child template for get the data if you want {{> tableContent _id }} :
<template name="table1">
<table>{{> tableContent }}</table>
</template>
<template name="table2">
<table>{{> tableContent }}</table>
</template>
<template name="tableContent">
{{#each listOfData}}
<tr>
<td>
{{name}}
</td>
</tr>
{{/each}}
</template>
tableContent.js =>
Template.tableContent.helpers({
listOfData: function () {
return X.find({_id: this._id});
}
});
Option three :
Register the helper in both templates.
<template name="table1">
<table>{{ listOfData }}</table>
</template>
<template name="table1">
<table>{{ listOfData }}</table>
</template>
table1.js=>
var listOfData = function(){
return ExampleColleciont.find();
};
Template.table1.helpers({
listOfData : listOfData
});
Template.table2.helpers({
listOfData : listOfData
});
I have a user based Meteor application with a collection representing groups.
A group is something like this:
{ name: groupname, members: [memberuseridlist], owner: owneruserid}
I have a template for these groups that looks like this:
{{#each groups}}
<li>{{name}}
-
<button class="join">+</button>
<button class="leave">-</button>
<button class="delete">x</button>
</li>
{{/each}}
But I'd like to ensure that only the relevant buttons are displayed e.g.:
{{#each groups}}
<li>{{name}}
-
{{#unless ismember}}<button class="join">+</button>{{/unless}}
{{#if ismember}}<button class="leave">-</button>{{/if}}
{{#if isowner}}<button class="delete">x</button>{{/if}}
</li>
{{/each}}
I have a set of template helper methods but I don't understand how to pass the actual group into the function, so that I can evaluate ismember and isowner for each group.
The context within {{#each groups}} is a group document. So within your helpers you can use this to mean a group. Try something like this:
Template.myTemplate.helpers({
ismember: function() {
return _.contains(this.memberuseridlist, Meteor.userId());
},
isowner: function() {
return this.owner === Meteor.userId();
}
});
If you wish to make these helpers more portable between your templates, see my article on models.
I need to display data to all clients using Meteor.publish/subscribe.I did one sample example in that example what i am did is 10 records are inserted at that time of server startup and these 10 records are trying to display to all clients.The Problem is The data doesn't shows the clients.I didn't have any idea because i am new to meteor JS.So Please see the below code and suggest me how to do?
HTML Code :
<head>
<title>DataApp</title>
</head>
<body>
{{> main}}
</body>
<template name="main">
{{#each messages}}
{{messages}}
{{/each}}
</template>
ANd JS Code is :
Messages = new Meteor.Collection("messages");
if (Meteor.isClient)
{
Meteor.subscribe('messages');
}
if (Meteor.isServer)
{
Meteor.startup(function ()
{
// code to run on server at startup
for(var i = 0 ; i <= 10 ; i++ )
{
console.log("EXE"+i);
Messages.insert({ name: "EXE"+i });
}
});
Meteor.publish('messages', function() {
return Messages.find();
});
}
Firstly, you are missing a template helper on your template main, so make your Meteor.isClient look like this:
if (Meteor.isClient) {
Meteor.subscribe('messages');
// this is the template helper that is referenced by {{messages}}
// in your template 'main'
Template.main.messages = function () {
return Messages.find();
};
}
Secondly, the handlebars in your html don't make sense, try this instead:
<template name="main">
<!-- inserts value of property 'name' of each object in 'messages' -->
{{#each messages}}
{{name}}
{{/each}}
</template>
I would like the ability to load templates dynamically without explicitly specifying the template.
As an example:
<template name="foo">
</template>
where 'foo' is the template, I would like the ability to load it dynamically by calling some method:
Meteor.render(Meteor.loadTemplate('foo'));
Is this possible?
Here's how to dynamically render templates, as of Meteor 0.9.4 - 1.0. All other answers were obsolete at the time of this writing.
Let's say you're editing a bunch of records, or creating a new one, and want to render either the update template, or the new template, based on some Session variables.
There are two ways to do this:
1) This is the officially recommended method for Meteor 0.9.4 or newer - it uses Template.dynamic:
<template name="records">
{{> Template.dynamic template=whichOne}}
</template>
<template name="recordUpdate">
...
</template>
<template name="recordNew">
...
</template>
Template.records.helpers({
whichOne: function () {
return Session.get('edit') ? 'recordUpdate' : 'recordNew'
// note that we return a string - per http://docs.meteor.com/#template_dynamic
}
});
2) This works in various Meteor versions, but isn't recommended officially because it's unclear that the template is chosen dynamically:
<template name="records">
{{> whichOne}}
</template>
{{! Note how "whichOne" is indistinguishable from a constant template name... }}
{{ ...like "recordUpdate" or "recordNew" below. }}
<template name="recordUpdate">
...
</template>
<template name="recordNew">
...
</template>
Template.records.helpers({
whichOne: function () {
return Session.get('edit') ? Template.recordUpdate : Template.recordNew
// note that we return a Template object, not a string
}
});
To pass a data context to the template, use:
{{> Template.dynamic template=whichOne data=myData}}
Meteor 0.9.x New API
Dan Dascalescu pointed out Meteor now has built-in dynamic templates! This is nice because you do not need to include the extra code as seen in previous versions.
{{> Template.dynamic template=template [data=data] }}
For Meteor 0.8.x Legacy
Dynamic Template Without Data: Boris Kotov's updated Blaze (0.8.0) answer is on the right track (taken from the latest docs), but it doesn't work as-is for me. I got the following to work:
{{> dynamicTemplate name=myDynName}}
<template name="dynamicTemplate">
{{#with chooseTemplate name}}
{{> template}}
{{/with}}
</template>
Template.dynamicTemplate.chooseTemplate = function (name) {
return { template: Template[name] };
};
I hope there is a simpler solution, but I needed to wrap the Template in a JSON as shown. Maybe this will help someone else to move forward.
Dynamic Template With Data: If you have and want data to be dynamic, be sure to make a helper method that can react. Be sure to do a Session.set() somewhere to see the effect.
// Inside "myContainingTemplate"
{{> dynamicTemplateWithData name=myDynName data=myDataHelper}}
<template name="dynamicTemplateWithData">
{{#with chooseTemplate name}}
{{#with ../data}}
{{> ..}}
{{/with}}
{{/with}}
</template>
Template.dynamicTemplateWithData.chooseTemplate = function (name) {
return Template[name];
};
Template.myContainingTemplate.helpers({
myDataHelper: function () {
Session.get('myReactiveKey');
}
});
You have found Meteor.render but what you are missing is the template loading.
In the docs it mentions that you can call Template.foo() to return the HTML for a template.
http://docs.meteor.com/#template_call
Putting that together you access the template foo or any other using bracket access so:
var templateName = "foo";
var fragment = Meteor.render( function() {
return Template[ templateName ](); // this calls the template and returns the HTML.
});
Then fragment is your Reactive fragment, so that your template can continue to receive live updates. Your fragment now needs placing in the web page (I use jQuery, so this example does as well):
$("#htmlnode").html( fragment );
$("#htmlnode") is just a node in your DOM where you want the template rendered. And you now have the rendered content in your web page.
I'm just doing it like this, no jQuery required:
EDITED
Template.mainContent.showContentFromRouter = function() {
return Template[Meteor.Router.page()]();
};
In this case I'm using the Meteor Router, and return whatever template that I choose to (from the Router), but you could just do this:
Template.mainContent.showDynamicContent = function() {
return Template['someTemplateYouveDefined']();
};
Update for blaze:
https://github.com/meteor/meteor/wiki/Using-Blaze#templatefoo-is-not-a-function-and-does-not-return-a-string
Dynamically render a template with a given data context
Old:
{{dynamicTemplate name="templateName" data=dataContext}}
Template.foo.dynamicTemplate = function (opts) {
return Template[opts.name](opts.data);
};
New: (Notably, in Blaze, keyword arguments to inclusion or block helpers are bundled into a single object which becomes the new data context)
{{> dynamicTemplate name="templateName" data=dataContext}}
<template name="dynamicTemplate">
{{#with chooseTemplate name}}
{{#with ../data}} {{! original 'data' argument to DynamicTemplate}}
{{> ..}} {{! return value from chooseTemplate(name) }}
{{/with}}
{{/with}}
</template>
Template.dynamicTemplate.chooseTemplate = function (name) {
return Template[name];
}
By the way, I don't really played with it, but this is what I took from the new blaze docs. So I think it should be the way to do it ;)
From https://github.com/meteor/meteor/wiki/Using-Blaze
{{> post}}
Template.foo.helpers({
post: function () {
return Template[this.postName];
}
});
Template inclusions now search the namespace of helpers and data for template objects, so it's easy to programmatically choose which template to use. This is a powerful feature, and will allow patterns like assigning one template as a helper of another so that it can be overridden.
Meteor 0.8.x Legacy
Using Joc's answer as a guide,
I've achieved similar using http://docs.meteor.com/#template_call, but using a helper instead, as suggested by the docs:
When called inside a template helper, the body of Meteor.render, or other settings where reactive HTML is being generated, the resulting HTML is annotated so that it renders as reactive DOM elements
My client.js looks a bit like this:
Template.myPageTemplate.helpers({
dynamicTemplate: function() {
// conditional logic can be added here to determine which template to render
return Template.myDynamicTemplate();
}
});
and my html looks like this:
<template name="myPageTemplate">
<h1>My Template</h1>
{{{dynamicTemplate}}}
</template>
<template name="myDynamicTemplate">
<h1>My Dynamic Template</h1>
</template>
Based on hillmark's answer, this is the easiest it could get:
Template.main.template = function() {
if (some_condition) {
return Template.A();
} else {
return Template.B();
}
};
With the corresponding .html
<body>
{{> main}}
</body>
<template name="main">
{{{template}}}
</template>
<template name="A">
<h1>Template A</h1>
</template>
<template name="B">
<h1>Template B</h1>
</template>
Edit
Doesn't work in Meteor 0.8.0
for me the easiest way was to just create a function get_dynamic_template, so something like:
var a= get_dynamic_template(template_name,data);
which returns what can be rendered as a normal variable {{a}}
The code for this function is quite simple:
var get_dynamic_template = function(template_name,data)
{
return function(){
return new Handlebars.SafeString(
UI.toHTML(
Template[template_name].extend({data: function () { return data; }}))
);
};
}
This would handl dynamic templates both with and without data:
(requires Blaze/ Meteor 0.8)
{{> dynamicTemplate name=templateName}}
<template name="dynamicTemplate">
{{#with chooseTemplate name }}
{{#if ../data}}
{{#with ../data }}
{{> .. }}
{{/with}}
{{else}}
{{> this}}
{{/if}}
{{/with}}
<template name="dynamicTemplate">
template javascript:
Template.dynamicTemplate.chooseTemplate = function (name) {
return Template[name];
};
I have an Ember.Button which should remove an element from an array. The button label is simply an X (for now).
I'd like to know the best way to store data for use by the button. If this was plain jquery I might use data-username. But what's the best way to do this?
update
Use case for this question would be something like this:
{{#each App.recentUsersArray}}
<li>
{{#view App.RecentNameBtn contentBinding="this"}} {{content}} {{/view}}
{{#view App.RecentNameDeleteBtn}}X{{/view}}
</li>
{{/each}}
In the second view, I need a way to know which username the delete action should apply to.
Use the {{action}} helper, which passes the context as argument, see http://jsfiddle.net/zVd9g/. Note: in the upcoming Ember.js version the action helper only passes one argument so you would have to adapt your sources accordingly.
If you want to use your existing views, you could do a contentBinding="this" on the App.RecentNameDeleteBtn as you already did on the App.RecentNameBtn.
Handlebars:
<script type="text/x-handlebars" >
{{#each App.arrayController}}
<button {{action "showTweets" target="App.arrayController" }} >{{this}}</button>
<button {{action "removeItem" target="App.arrayController" }}>x</button>
<br/>
{{/each}}
</script>
JavaScript:
App = Ember.Application.create({});
App.arrayController = Ember.ArrayProxy.create({
content: [1, 2, 3, 4, 5, 6],
removeItem: function(view, evt, item) {
console.log('remove user %#'.fmt(item));
this.removeObject(item);
},
showTweets: function(view, evt, item) {
console.log('show tweets of user %#'.fmt(item));
}
});