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copied!<p>Your model is kind of iffy... Consider</p> <p><code>{name:"Category name", parent:"_id of parent category"}</code></p> <p>Okay, that's a lot simpler. To create a category.</p> <pre><code>var moviesId = Categories.insert({name:"Movies"}); Categories.insert({name:"Horror",parent:moviesId}); </code></pre> <p>That was easy enough. Now, to render in a way that <code>{{#each}}</code> works:</p> <pre><code>Template.categories.categories = function(parent) { if (parent) { return Categories.find({parent:parent}).fetch(); } else { return Categories.find({parent:{$exists:false}}); } } </code></pre> <p>You might be seeing where this is going...</p> <pre><code><template name="categories"> {{#each categories}} <ul>{{name}} {{#each categories _id}} <li>{{name}}</li> {{/each}} </ul> {{/each}} </template> </code></pre> <p>Now I'm not sure if the <code>{{#each}}</code> block helper can take a function argument when it calls another helper. If it doesn't...</p> <pre><code>Template.categories.categories = function() { return Categories.find({parent:{$exists:false}}).map(function(parentCategory) { return _.extend(parentCategory, {children:Categories.find({parent:parentCategory._id}).fetch()}); }); } </code></pre> <p>That's a real doozy. It returns parent categories with a new "children" list property, that contains all the children categories. Now you can do:</p> <pre><code><template name="categories"> {{#each categories}} <ul>{{name}} {{#each children}} <li>{{name}}</li> {{/each}} </ul> {{/each}} </template> </code></pre> <p>Clever, eh?</p>

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