Polymer 1.0 more-routing - polymer

Question

Polymer: 1.0.3
More routing: 1.0.0
Having some issues with Polymer "more-routing". Those are -
1) Get this log on console -
[dom-bind::_annotatedComputationEffect]: compute method `urlFor` not defined
2) First level routing works (even though I get those error/warning messages). But second level routing (i mean nested routing) does not work. On "users" page pressing the name doesn't take me to "user-info" page. In fact the name does not appear as a link, it appears as a text. Here is my code -
My "routing.html"--
<link rel="import" href="../bower_components/more-routing/more-routing.html">
<more-routing-config driver="hash"></more-routing-config>
<more-route name="home" path="/"></more-route>
<more-route name="users" path="/users">
<more-route name="user-info" path="/:name"></more-route>
</more-route>
<more-route name="contact" path="/contact"></more-route>
My "index.html" ---
<more-route-selector>
<paper-menu class="list" on-iron-select="onMenuSelect">
<a route="home" href="{{urlFor('home')}}">
<iron-icon icon="home"></iron-icon>
<span>Home</span>
</a>
<a route="users" href="{{urlFor('users')}}">
<iron-icon icon="info"></iron-icon>
<span>Users</span>
</a>
<a route="contact" href="{{urlFor('contact')}}">
<iron-icon icon="mail"></iron-icon>
<span>Contact</span>
</a>
</paper-menu>
</more-route-selector>
<more-route-selector selectedParams="{{params}}">
<iron-pages>
<section route="home">
<paper-material elevation="1">
<bortini-home></bortini-home>
</paper-material>
</section>
<section route="users">
<paper-material elevation="1">
<h2 class="paper-font-display2">Users</h2>
<p>This is the users section</p>
Rob
</paper-material>
</section>
<section route="user-info">
<paper-material elevation="1">
<h2 class="paper-font-display2">
User:<span>{{params.name}}</span>
</h2>
<div>This is <span>{{params.name}}</span>'s section</div>
</paper-material>
</section>
<section route="contact">
<paper-material elevation="1">
<h2 class="paper-font-display2">Contact</h2>
<p>This is the contact section</p>
</paper-material>
</section>
</iron-pages>
</more-route-selector>

Answer 1

With 1.0 (perhaps earlier), Polymer stopped supporting expressions inside data-bindings (Migration Guide - Data binding). Thankfully, you can still call a function in a binding (called a "computed binding").
From what I can tell, the urlFor() method must be slightly too complex to work as a computed binding (the params object isn't a dependent property). I was able to make it work by wrapping urlFor() in a simpler function - one that works as a computed binding - something like this:
<more-routing-config driver="path"></more-routing-config>
<more-route name="users" path="/users">
<more-route name="user-info" path="/:name"></more-route>
</more-route>
<template is="dom-bind">
Rob
</template>
<script>
var template = document.querySelector('template');
template.makeUrl = function(route, name) {
return MoreRouting.urlFor(route, {name:name});
};
</script>
You can also pass variables in your computed binding, as long as they're dependent properties, like the item in a repeating template
<template is="dom-bind">
<template is="dom-repeat" items="{{users}}">
{{item.name}}
</template>
</template>
<script>
var template = document.querySelector('template');
template.makeUrl = function(route, user) {
return MoreRouting.urlFor(route, {name:user.name});
};
</script>