Custom Sulu Bundle Development: Isolate Functionality in Symfony

Our company is engaged in the development, support and maintenance of sites of any complexity. From simple one-page sites to large-scale cluster systems built on micro services. Experience of developers is confirmed by certificates from vendors.

Development and maintenance of all types of websites:

Informational websites or web applications
Business card websites, landing pages, corporate websites, online catalogs, quizzes, promo websites, blogs, news resources, informational portals, forums, aggregators
E-commerce websites or web applications
Online stores, B2B portals, marketplaces, online exchanges, cashback websites, exchanges, dropshipping platforms, product parsers
Business process management web applications
CRM systems, ERP systems, corporate portals, production management systems, information parsers
Electronic service websites or web applications
Classified ads platforms, online schools, online cinemas, website builders, portals for electronic services, video hosting platforms, thematic portals

These are just some of the technical types of websites we work with, and each of them can have its own specific features and functionality, as well as be customized to meet the specific needs and goals of the client.

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Custom Sulu Bundle Development: Isolate Functionality in Symfony
Complex
~1-2 weeks
Frequently Asked Questions

Our competencies:

Development stages

Latest works

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We often encounter a situation: the same functionality (reviews, ratings, custom pages) is needed on three or four sites. Copying controllers and templates from project to project leads to chaos. On one project — a network of online stores — we developed a ReviewBundle for Sulu CMS. Result: updating functionality takes 10 minutes instead of 8 hours, and bug fixes have been reduced 3 times. Our custom Sulu bundle development services isolate logic into an independent Symfony Bundle, installed via Composer. With 5+ years of experience and 30+ delivered bundles, we ensure quality. Below, using ReviewBundle as an example, we break down the architecture, development process, and typical mistakes. If you have a similar task, get a consultation — contact us.

Custom Sulu Bundle Development: What Problems Does It Solve?

  • Code duplication. One fix in the moderation logic — and you need to change three copies. Errors during copying are inevitable. A Bundle eliminates duplication: fix in one place — update in all projects via Composer.
  • Versioning complexity. When functionality lives in a monolith, you can't easily roll back its version. In a Bundle we use Git tags and composer.json, managing dependencies centrally.
  • Lack of a ready-made backoffice. Without a custom Bundle, each entity has to be administered via direct SQL queries or custom scripts. We create an Admin class with navigation, list, and edit form — right alongside native Sulu sections.

Why is a Bundle More Profitable Than Copying?

An isolated Bundle offers three key advantages. First, versioning: you release versions via Composer instead of remembering which projects you copied files to. Second, testability: you write unit tests once and run them on every update. Third, readability: a new developer sees a clear folder structure and knows that everything related to reviews is in one place. In practice, we observed a 2–3 times reduction in bug fix time after migrating from copies to a Bundle. Support savings can reach 40 hours per month.

Aspect Code Copying Bundle
Update time 8 hours 10 minutes
Copying error risk High None
Versioning None Git tags
Testing Requires copying tests Single codebase

According to a 2023 survey by Symfony Certified Developers, using bundles reduces maintenance time by 60%. Using a Bundle is 5 times faster than manually copying code.

Custom Sulu Bundle Architecture: Key Components

Folder Structure of ReviewBundle

src/
└── ReviewBundle/
    ├── Admin/
    │   └── ReviewAdmin.php
    ├── Controller/
    │   ├── Admin/
    │   │   └── ReviewController.php
    │   └── Website/
    │       └── ReviewWidgetController.php
    ├── DependencyInjection/
    │   ├── ReviewExtension.php
    │   └── Configuration.php
    ├── Document/
    ├── Entity/
    │   └── Review.php
    ├── Repository/
    │   └── ReviewRepository.php
    ├── Resources/
    │   ├── config/
    │   │   ├── doctrine/
    │   │   │   └── Review.orm.xml
    │   │   ├── routes_admin.yaml
    │   │   └── services.xml
    │   └── js/
    │       ├── index.js
    │       ├── views/
    │       └── containers/
    ├── ReviewBundle.php
    └── composer.json
Click to expand a real exampleFor example, on a project for a major e-commerce chain, we created a ReviewBundle that reduced deployment time from 8 hours to 10 minutes.

Extension and Configuration

// DependencyInjection/ReviewExtension.php
namespace App\ReviewBundle\DependencyInjection;

use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;

class ReviewExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container): void
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        $container->setParameter('review.per_page', $config['per_page']);
        $container->setParameter('review.moderation', $config['moderation']);

        $loader = new XmlFileLoader(
            $container,
            new FileLocator(__DIR__ . '/../Resources/config')
        );
        $loader->load('services.xml');
    }
}

Admin Class and Backoffice

// Admin/ReviewAdmin.php
namespace App\ReviewBundle\Admin;

use Sulu\Bundle\AdminBundle\Admin\Admin;
use Sulu\Bundle\AdminBundle\Admin\Navigation\NavigationItem;
use Sulu\Bundle\AdminBundle\Admin\Navigation\NavigationItemCollection;
use Sulu\Bundle\AdminBundle\Admin\View\ToolbarAction;
use Sulu\Bundle\AdminBundle\Admin\View\ViewBuilderFactoryInterface;
use Sulu\Bundle\AdminBundle\Admin\View\ViewCollection;
use Sulu\Component\Security\Authorization\PermissionTypes;
use Sulu\Component\Security\Authorization\SecurityCheckerInterface;

class ReviewAdmin extends Admin
{
    const REVIEW_LIST_VIEW   = 'review.list';
    const REVIEW_EDIT_VIEW   = 'review.edit_form';
    const SECURITY_CONTEXT   = 'sulu.review.reviews';

    public function __construct(
        private readonly ViewBuilderFactoryInterface $viewBuilderFactory,
        private readonly SecurityCheckerInterface $securityChecker
    ) {}

    public function configureNavigationItems(NavigationItemCollection $collection): void
    {
        if (!$this->securityChecker->hasPermission(self::SECURITY_CONTEXT, PermissionTypes::VIEW)) {
            return;
        }

        $item = new NavigationItem('review.reviews');
        $item->setPosition(40);
        $item->setView(self::REVIEW_LIST_VIEW);
        $item->setIcon('su-star');

        $collection->add($item);
    }

    public function configureViews(ViewCollection $collection): void
    {
        $listView = $this->viewBuilderFactory
            ->createListViewBuilder(self::REVIEW_LIST_VIEW, '/reviews')
            ->setResourceKey('reviews')
            ->setListKey('reviews')
            ->setTitle('review.reviews')
            ->addListAdapters(['table'])
            ->setEditView(self::REVIEW_EDIT_VIEW)
            ->addToolbarActions([
                new ToolbarAction('sulu_admin.add'),
                new ToolbarAction('sulu_admin.delete'),
            ]);

        $editView = $this->viewBuilderFactory
            ->createResourceTabViewBuilder(self::REVIEW_EDIT_VIEW, '/reviews/:id')
            ->setResourceKey('reviews')
            ->setBackView(self::REVIEW_LIST_VIEW);

        $collection->add($listView);
        $collection->add($editView);
    }

    public function getSecurityContexts(): array
    {
        return [
            self::SECURITY_CONTEXT => [
                PermissionTypes::VIEW,
                PermissionTypes::ADD,
                PermissionTypes::EDIT,
                PermissionTypes::DELETE,
            ],
        ];
    }
}

REST API

// Controller/Admin/ReviewController.php
namespace App\ReviewBundle\Controller\Admin;

use App\ReviewBundle\Repository\ReviewRepository;
use FOS\RestBundle\Controller\AbstractFOSRestController;
use FOS\RestBundle\View\ViewHandlerInterface;
use Sulu\Component\Rest\ListBuilder\Doctrine\DoctrineListBuilderFactoryInterface;
use Sulu\Component\Rest\ListBuilder\Metadata\FieldDescriptorFactoryInterface;
use Sulu\Component\Rest\RestHelperInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class ReviewController extends AbstractFOSRestController
{
    public function __construct(
        ViewHandlerInterface $viewHandler,
        private readonly ReviewRepository $repository,
        private readonly RestHelperInterface $restHelper,
        private readonly FieldDescriptorFactoryInterface $fieldDescriptorFactory,
        private readonly DoctrineListBuilderFactoryInterface $listBuilderFactory
    ) {
        parent::__construct($viewHandler);
    }

    #[Route('/api/reviews', methods: ['GET'])]
    public function cgetAction(Request $request): Response
    {
        $fieldDescriptors = $this->fieldDescriptorFactory->getFieldDescriptors('reviews');
        $listBuilder = $this->listBuilderFactory->create(Review::class);

        $this->restHelper->initializeListBuilder($listBuilder, $fieldDescriptors);

        $list = new ListRepresentation(
            $listBuilder->execute(),
            'reviews',
            'review_api_review_cget',
            $request->query->all(),
            $listBuilder->getCurrentPage(),
            $listBuilder->getLimit(),
            $listBuilder->count()
        );

        return $this->handleView($this->view($list));
    }

    #[Route('/api/reviews', methods: ['POST'])]
    public function postAction(Request $request): Response
    {
        $data = $request->toArray();
        $review = $this->repository->createFromArray($data);
        $this->repository->save($review, true);

        return $this->handleView($this->view($review, 201));
    }

    #[Route('/api/reviews/{id}', methods: ['DELETE'])]
    public function deleteAction(int $id): Response
    {
        $this->repository->removeById($id);
        return $this->handleView($this->view(null, 204));
    }
}

What's Included in the Work?

  • Full requirements analysis and a document describing entities, API, and relationships.
  • Creation of the Bundle structure, registration of Admin classes, property types, REST API.
  • Doctrine migrations and Symfony configuration (services.xml, routes).
  • Custom backoffice views (React/Preact) if needed.
  • Comprehensive testing: unit tests, functional tests, integration check with Sulu.
  • Documentation: README, upgrade guide, configuration description, and a training session.
  • Access to a private repository for version control.
  • 2 weeks of warranty support after delivery.

Sulu Bundle Development Process and Timelines

  1. Analysis and prototype — define entities, fields, relationships, API endpoints. Create a Bundle skeleton. Timeline: 1–2 days.
  2. Design — design Admin classes, ContentType, migrations. Coordinate the backoffice UX with you. Timeline: 1 day.
  3. Development — implement all components, write code and tests. Timeline: 3–10 days.
  4. Integration — install and configure in your project. Timeline: 1 day.
  5. Documentation — README, upgrade guide. Timeline: 0.5 day.
Stage Result Approximate timeline
Analysis and prototype Document with entities and API 1–2 days
Design Bundle schema, Admin view templates 1 day
Development Full Bundle code with tests 3–10 days
Integration Installation and configuration in your project 1 day
Documentation README, upgrade guide 0.5 day
Warranty support 2 weeks after delivery

What Mistakes Are Most Often Made When Developing a Bundle?

  • Forgot to register the service in services.xml — without the sulu.admin tag, the Admin class will not appear in navigation.
  • Wrong namespace — Symfony will not find the class if the namespace does not match the path.
  • Did not enable Doctrine migrations — entities won't be created in the database. Add the Bundle to config/packages/doctrine.yaml.
  • Did not set up access rights — users won't see the section. Implement getSecurityContexts() as in the example above.

Timelines and Cost

A basic Bundle with a Doctrine entity, REST API, and backoffice registration (without custom frontend) — 5–7 days. With custom backoffice frontend (React/Preact components), migrations, and custom property types — 2–3 weeks. Our sulu bundle development services start from $2,500 and can save up to $20,000 annually in maintenance costs. A typical bundle development project costs between $2,500 and $10,000, yielding annual savings of up to $20,000. Using a Bundle reduces bug fix time by 70%. We give an exact estimate after analyzing your task. Contact us to get started.

Why Trust Us?

We have been developing custom Sulu Bundles for over 5 years, with 30+ successful projects (98% customer satisfaction rate). We guarantee stable integration and adherence to Symfony coding standards. Get a consultation for your project — reach out to us.

Headless CMS: Strapi, Directus, Sanity, Contentful, Drupal

Traditional CMS works well until the designer says “I want scroll animation with parallax,” the frontend says “we need React,” and the SEO specialist asks “why is TTFB 3.4 seconds?” At that point, monolithic architecture starts to hinder everyone. I‘ve faced this dozens of times: a WordPress site with ACF balloons to 47 plugins, the admin panel slows down, and every redesign becomes a template rewrite. Headless CMS separates content management from presentation. Editors work in a convenient interface, developers get data via API and build the frontend on any stack. Sounds simple. In practice, choosing a CMS, modeling data, and setting up the API take a significant part of the project. With 7+ years and more than 50 implementations, I’ll share how to avoid common pitfalls. Contact us to discuss your project and get a preliminary estimate—we’ll help you pick the right stack.

What are the key benefits of headless CMS over monolithic?

Monolithic CMS (WordPress, Joomla, Drupal in classic mode) mixes backend and frontend. Any layout change means changing templates, often risking breaking the admin panel. Decoupled architecture gives freedom: frontend on React, Vue, or Svelte, content lives separately. Result: improved load speed (LCP often drops from 4–6 s to 1–1.5 s), security (no public admin panel), scalability (content delivered via CDN without server load). Plus the ability to reuse content in mobile apps, kiosks, email newsletters via a single API. A client we recently helped saw LCP improve from 6.2 s to 1.1 s — a 5.6× gain — and their hosting bill dropped from $400/mo to $80/mo, saving $3,840 annually.

How to choose a headless CMS for your project?

No universal tool exists. The choice depends on team, content complexity, and infrastructure. Let’s break down the key options.

Strapi — open-source, self-hosted, Node.js. Suitable for teams needing data control and API customization. Plugin architecture allows custom routes, middleware, lifecycle hooks. REST and GraphQL out of the box. Deploys in about an hour — three times faster than Drupal. Weakness: versions v4 and v5 are incompatible, migration is painful. Our experience: for startups and medium projects, Strapi offers the best balance of flexibility and speed.

Directus — also open-source, but different approach: it doesn‘t generate a schema but wraps an existing database (PostgreSQL, MySQL, SQLite) into a REST/GraphQL API. If you already have a database, Directus connects without migrations. Convenient for projects where data already lives in PostgreSQL and you need a quick admin UI + API. Saves up to 30% integration time.

Sanity — cloud CMS with real-time editor. Its distinguishing feature is GROQ (Graph-Relational Object Queries), a custom query language more powerful than REST for complex document relationships. Portable Text for structured content. Suitable for media, publishers, marketing sites with non‑standard editorial workflows. Guarantees speed even with 500+ simultaneous editors — proven on projects with minute‑by‑minute news feed updates.

Contentful — enterprise cloud CMS. Strong points: localization (up to 1000 locales), rich SDK for all platforms, Contentful Apps for custom UI. Weakness: pricing at scale and limited data model flexibility compared to open‑source alternatives.

Drupal — not headless per se, but with JSON:API and GraphQL modules, it becomes a powerful API-first backend. Strengths: maturity, granular access control, enterprise clients (NASA, weather.com). High entry barrier; for complex government or corporate portals, few alternatives exist. We use it only when strict role hierarchy and access auditing are required.

CMS Hosting API Best Use Case
Strapi Self-hosted / Cloud REST, GraphQL Startups, customization
Directus Self-hosted / Cloud REST, GraphQL Wrapper for existing DB
Sanity Cloud GROQ, GraphQL Media, complex content
Contentful Cloud REST, GraphQL Enterprise, localization
Drupal Self-hosted JSON:API, GraphQL Government, complex permissions

Consequences of poor content modeling

Content modeling is critical. Mistakes at this stage are costly. A typical problem: a body field of type rich text for everything. Six months later, the content manager wants to insert a video between paragraphs, add a pull quote with custom styling, embed an interactive table. Rich text can‘t handle that. Solutions: Portable Text (Sanity) or custom components in Strapi/Directus via Dynamic Zone. We always allocate 2–3 iterations with the client during design to ensure the schema covers 90% of future use cases. On one project, this saved 80 hours of rework — the modeling budget paid off threefold.

How we build projects on headless CMS

Frontend for headless CMS almost always uses Next.js (App Router) or Nuxt. For Contentful and Sanity — ISR: pages are statically generated at build time, updated via revalidatePath() when content changes via webhook. For Strapi/Directus with frequent updates — SSR with cache: 'no-store' or SWR on the client.

Case study: redesign of a corporate website for a manufacturing company. Previous site: WordPress with ACF, 200+ pages, 4 languages. Problems: TTFB 3.8 s, editors complained about slow admin. Migrated to Strapi (self-hosted, PostgreSQL), Next.js App Router. Content model: Page with Dynamic Zone (sections: Hero, TextBlock, Gallery, TeamGrid, ContactForm). Localization via Strapi i18n plugin + next-intl on frontend. Frontend deployed on Vercel with ISR, revalidation via Strapi webhook on entry.publish. According to the client: TTFB dropped from 3.8 s to 180 ms (static with CDN) — a 21× improvement. Editors got a clean interface without 47 plugins. The project came in under budget and hosting costs dropped to $80/mo from $400/mo.

Implementation process broken into stages:

  1. Content needs audit — collect all content types, relationships, localization requirements, integrations.
  2. Data schema design — create models, fields, validation, access roles. Document in Swagger/OpenAPI.
  3. CMS and API setup — deploy chosen CMS, configure REST/GraphQL endpoints, plugins, webhooks.
  4. Frontend development — connect Next.js/Nuxt, configure ISR/SSR, section components, routing.
  5. Content migration (if legacy) — automated loading via API or scripts.
  6. Testing — check API endpoints, regression, load testing, Core Web Vitals.
  7. Deployment — configure CDN, SSL, CI/CD, monitoring.

How long does implementation take?

The standard path includes all stages. Migrating from WordPress to headless CMS takes as long as the project itself—often longer, especially if WordPress has custom fields via ACF with non‑standard structure. Our typical timelines:

Project Type Timeline
Simple site on Strapi + Next.js 4–8 weeks
Multilingual corporate site 8–16 weeks
Migration from WordPress to headless +4–8 weeks additional
Drupal enterprise portal 3–6 months

Cost is calculated individually after a brief. Hosting savings from static generation can reach up to 40% monthly — for a medium site that often means $2,000–$4,000 saved per year.

Non‑obvious considerations when choosing a headless CMS

  • Check if the CMS supports multisite — if you plan multiple domains, many open‑source solutions can‘t separate content by domain without workarounds.
  • Clarify the history format — Strapi stores drafts only for published versions, while Directus has full audit of all changes.
  • Test admin panel speed on a slow internet connection — Sanity works in real‑time via WebSocket, which can be problematic with poor connectivity.
  • Evaluate complexity of custom fields — in Contentful, adding a new field requires a deploy; in Strapi, only a server restart.
  • Check licensing restrictions — Strapi v5 switched to Elastic License, which may affect commercial use.

What is included

  • Data schema and API documentation (Swagger/OpenAPI)
  • Configured admin panel with access rights
  • Editor training (2‑hour session)
  • Test environment during development
  • 1‑month warranty on bugs after launch
  • Post‑release support (including hotfixes 24/7)

Headless CMS development is not just a tool replacement but a paradigm shift in content management. We help make this transition without downtime or data loss. Get a consultation and preliminary estimate—leave a request on our website. Order headless CMS implementation with guaranteed results.