BreadcrumbBundle

Introduction

This Symfony bundle provides integration of breadcrumbs via route config and rendering in your Twig templates. This bundle is heavily inspired by the inactive https://github.com/xi-project/xi-bundle-breadcrumbs

Installation

Step 1: Composer require

$ php composer.phar require "thormeier/breadcrumb-bundle"

Step2: Enable the bundle in the kernel

<?php
// app/AppKernel.php

public function registerBundles()
{
    $bundles = array(
        // ...
        new Thormeier\BreadcrumbBundle\ThormeierBreadcrumbBundle(),
        // ...
    );
}

Configuration

Enable the bundle in your config.yml:

# config.yml
thormeier_breadcrumb: ~

The template defaults to a very basic one, providing a <ul> with <li> and <a> for every breadcrumb.

Usage

Basic

A breadcrumb tree is created by the fields label and parent_route in the defaults of a route. Basic tree example:

# routing.yml

acme_demo_home:
    path: /
    options:
        breadcrumb:
            label: Home

acme_demo_contact:
    path: /contact
    options:
        breadcrumb:
            label: Contact
            parent_route: acme_demo_home

acme_demo_catalogue:
    path: /catalogue
    options:
        breadcrumb:
            label: 'Our Catalogue'
            parent_route: acme_demo_home

acme_demo_catalogue_categories:
    path: /catalogue/categories
    options:
        breadcrumb:
            label: 'All categories'
            parent_route: acme_demo_catalogue

Would result in a breadcrumb tree like:

acme_demo_home
    |- acme_demo_contact
    `- acme_demo_catalogue
       `- acme_demo_catalogue_categories

If the current route is acme_demo_catalogue, the breadcrumbs would for instance show the following:

Home > Our Catalogue

Since the configuration of the breadcrumbs happens on routing config, it's generally agnostic from how the routing configuration happens. This means that configuring breadcrumbs for instance via annotations is perfectly possible:

/**
 * ...
 * @Route(
 *    "/contact",
 *    name="acme_demo_contact",
 *    options={
 *        "breadcrumb" = {
 *            "label" = "Contact",
 *            "parent_route" = "acme_demo_home"
 *        }
 *    })
 * ...
 */

The configuration can also be done in XML and PHP.

Dynamic routes

If you happen to have dynamic routes or dynamic translations that you need in your breadcrumbs, they can be defined like so:

# routing.yml

acme_demo_product_detail:
    path: /products/{id}
    options:
        breadcrumb:
            label: 'Produkt: %%name%%'
            parent_route: acme_demo_catalogue

(This example uses a string with a placeholder in the routing directly. You can also define the label text in a translation file and only use the translation key as the label. The template will handle the translation and replacing.)

Notice the double % to escape the parameter in the label. This needs to be done, because routing.yml is being parsed by the Symfony container and recognizes constructs, such as %name% as a container parameter and tries to inject those. The double-% escapes it, the template is handling the rest.

You can then set parameters for both directly on the Breadcrumb object, for instance:

<?php
// MyController

// ...

public function productDetailAction()
{
    $product = ...;

    // ...

    $this->get('thormeier_breadcrumb.breadcrumb_provider')
        ->getBreadcrumbByRoute('acme_demo_product_detail')
        ->setRouteParams(array(
            'id' => $product->getId(),
        ))
        ->setLabelParams(array(
            'name' => $product->getName(),
        ));
        
    // ...
}

Please note that the breadcrumb must be defined on the route in order to set parameters.

Dynamic breadcrumbs

If you happen to have a dynamic routing tree, for instance a tree of category pages that can go infinitely deep, you can add breadcrumbs that are not defined on a route on the fly. For instance like this:

<?php

use Thormeier\BreadcrumbBundle\Model\Breadcrumb;

// ...

// Route of the product, we want the categories before this
$productCrumb = $breadcrumbProvder->getBreadcrumbByRoute('acme_demo_product_detail');
$collection = $breadcrumbProvider->getBreadcrumbs();

foreach ($product->getCategories() as $category) {
    $newCrumb = new Breadcrumb(
        'Category: %name%',              // Label
        'acme_demo_category',            // Route
        ['id' => $category->getId()],    // Route params
        ['name' => $category->getName()] // Label params
    );
    
    // Adds $newCrumb right in front of $productCrumb
    $collection->addBreadcrumbBeforeCrumb($newCrumb, $productCrumb);
    
    // Or: ->addBreadcrumb(), ->addBreadcrumbAtPosition(), ->addBreadcrumbAfterCrumb(), ->addBreadcrumbToStart()
}

These breadcrumbs are not stored in the cache though.

Displaying in twig

Call the twig extension as following:

{# someTemplate.html.twig #}
{# ... #}

{{ breadcrumbs() }}

{# ... #}

Using the bootstrap template

The bundle also provides a default implementation for Bootstrap. It can be used as follows:

# config.yml
thormeier_breadcrumb:
    template: @ThormeierBreadcrumb/breadcrumbs_bootstrap.html.twig

Replacing the default template

If you want to use a custom template, add the following to your config.yml

# config.yml
thormeier_breadcrumb:
    template: 'my twig template path'

Your custom breadcrumb template receives a variable called breadcrumbs that is a collection that represents your breadcrumbs, ordered by highest in the tree to lowest.

A single breadcrumb has the fields route, routeParameters, label and labelParameters. route and routeParameters are used to generate a path in twig, i.e. path(breadcrumb.route, breadcrumb.routeParameters), whereas label and labelParameters are used to generate the text for the breadcrumb, i.e. {{ (breadcrumb.label)|trans(breadcrumb.labelParameters) }}

Your custom template might look something like this:

{# myBreadcrumbs.html.twig #}

<div>
    {% for breadcrumb in breadcrumbs %}
        <a href="{{ path(breadcrumb.route, breadcrumb.routeParameters) }}">
            {{ breadcrumb.label|replace({"%%": "%"})|trans(breadcrumb.labelParameters) }}
        </a>
    {% endfor %}
</div>

The replacing of %% with single % happens inside the template. See "Dynamic routes" as why this is needed.

Have a look at Resources/views/breadcrumbs.html.twig and Resources/views/breadcrumbs_bootstrap.html.twig to see the default implementations.

Customize implementations

The model class and/or its collection can be replaced by own implementations, that implement the Thormeier\BreadcrumbBundle\Model\BreadcrumbInterface and Thormeier\BreadcrumbBundle\Model\BreadcrumbCollectionInterface:

# config.yml
thormeier_breadcrumb:
    model_class: Acme\Breadcrumbs\Model\MyModel
    collection_class: Acme\Breadcrumbs\Model\MyCollection

The provider service ID can be replaced by setting the parameter provider_service_id

# config.yml
thormeier_breadcrumb:
    provider_service_id: acme.breadcrumbs.my_provider

Caching

This bundle uses the routing cache to store breadcrumb lists per route on cache:warmup. They are then turned into a BreadcrumbCollection on demand.

Slides

A slideshow presenting the bundle and explaining some concepts a little further is available on slideshare: http://www.slideshare.net/Thormeier/thormeierbreadcrumbbundle