when to reference a property that is not a valid identifier, how can I use segment-literal notation? - handlebars.js

In the document handlebars
{{#each articles.[10].[#comments]}}
<h1>{{subject}}</h1>
<div>
{{body}}
</div>
{{/each}}
but I want such use it
{{#each nav-list.value}}
<li class="nav-{{#index}}">
{{{../[content.value].value}}}
</li>
{{/each}}
Obviously, it dons't work! How should I implement this...

Related

Creating UI comment component with blaze

I'm trying to create a comments component with Blaze but i don't know how to handle the replies.
This is the schema for the 'comment' element:
_id, authorId, message, replies (those are comment ids), isReply (boolean).
Then I created a template with html
{{#each message}}
<div class="message">
<h2>{{author}}</h2>
<p>{{message</p>
<a class="button">Reply</a>
</div>
{{#each replies}}
<div class="message">
<h2>{{author}}</h2>
<p>{{message</p>
<a class="button">Reply</a>
</div>
{{/each}}
{{/each}}
Well, how do I handle the replies of the replies? Any Idea?
You need to use the templates recursively! An example
In your case, something like the following:
{{#each message}}
<div class="message">
<h2>{{author}}</h2>
<p>{{message</p>
<a class="button">Reply</a>
</div>
{{#each replies}}
{{> reply}}
{{/each}}
{{/each}}
<template name="reply">
<div class="message">
<h2>{{author}}</h2>
<p>{{message</p>
<a class="button">Reply</a>
{{#each replies}}
{{> reply}}
{{/each}}
</div>
</template>
You'll need a replies helper for the reply template that gets the replies to that reply.

How to create a template helper pathFor path

Usually I just do {{pathFor 'dashboard'}}
But what if I get the path 'dashboard' from template helper as {{name}}
I can't do this{{pathFor '{{name}}'}} but I need to!
It's a submenu which looks like:
{{#each connectedChannels}}
{{> submenuChannel}}
{{/each}}
<template name="submenuChannel">
<li>
<span class="sidebar-text">{{name}}</span>
</li>
</template>
It should work if you remove the quotes and braces around name:
<a href="{{pathFor name}}">

How to do recursive templates in Meteor?

rather a theoretical question - how can I render recursive templates in Meteor? For example, displaying a comment on comment with unlimited number of comment sub-levels so that HTML would be diplayed as the following?
<section>
some text
<section>
nested text
<section>
further nested text and sections
.....
</section>
</section>
</section>
In my case I pass to the "tree" template a mongoDB document and this document can have unlimited number of sub-content levels. My example below doesn't work the way I want.
<template name="tree">
<div class="wrapper" style="border:1px solid red">
<ul>
{{#each getStructure}}
<li>
{{#each content}}
<ul>
<li>
<a class="item">{{text}}</a>
<!-- TODO: this stuff needs to be recursive.
{{#if sub_content}}
<ul>
{{#each sub_content}}
<li>
<a class="item">{{text}}</a>
{{#if sub_content}}
....
{{/if}}
</li>
{{/each}}
</ul>
{{/if}}
</li>
</ul>
{{/each}}
</li>
{{/each}}
</ul>
</div>
</template>
A simplified example of recirsuve, say you had a post sample template of:
<template name="post">
{{post_text}}
{{#each comments}}
{{>comment}}
{{/each}}
</template>
and a post helper of:
Template.post.helpers({
comments: function() {
return CommentCollection.find({post_id: this._id, parent_id: {$exists: 0}});
}
});
I would create a template for the comment layout and provide a helper in that for sub-comments, depending on your data structure something like the following:
<template name="comment">
{{comment_text}}
{{#each sub_comment}}
{{> comment}}
{{/each}}
</template>
and then the helper along the lines of:
Template.comment.helpers({
sub_comments: function() {
return CommentCollection.find({parent_id: this._id});
}
});
This would recursively produce the comments template for each sub-comment then roll back up the tree to the next #each and then print that comment and all of its sub-comments etc.

How to filter the data from a collection loop?

Im trying to build a related info widget, based on the data from the YAML front-matter.
Each page on my collection has some tags associated, and the idea would be to only show those pages who have tags in common with the currently viewed page.
I've managed to get the complete tags outputting the existent pages with the following code:
<section class="see-also">
{{#each tags}}
<p>In <span class="tag">{{tag}}</span>:</p>
{{#each pages}}
<li>{{data.title}}</li>
{{/each}}
{{/each}}
</section>
Can I apply some sort of filter on {{#each tags}} ?
Thanks.
There's an inArray helper that you can use to test if the current tag is in the tags collection on the page being currently rendered:
<section class="see-also">
{{#each tags}}
{{#inArray ../page.tags tag }}
<p>In <span class="tag">{{tag}}</span>:</p>
{{#each pages}}
<li>{{data.title}}</li>
{{/each}}
{{/inArray}}
{{/each}}
</section>
You might have to modify the parent path syntax to account for the additional block helper:
<section class="see-also">
{{#each tags}}
{{#inArray ../page.tags tag }}
<p>In <span class="tag">{{tag}}</span>:</p>
{{#each ../pages}}
<li>{{../data.title}}</li>
{{/each}}
{{/inArray}}
{{/each}}
</section>

Pass parent of an item into a partial with Handlebars

I have a handlebars template like this:
{{#each items}}
<li id="{{id}}">{{name}}</li>
{{/each}}
Now I want to split this template as I want to reuse the template for li
main.hbs:
{{#each items}}
{{>child }}
{{/each}}
child.hbs
<li id="{{id}}">{{name}}</li>
But unfortunattly the child template cant access ../route
You can pass in the parent context to the child partial like so:
{{#each items}}
{{>child this}}
{{/each}}
You are also going to probably fix the route value to look like this
<li id="{{id}}">{{name}}</li>

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