Tree Laravel Package

Getting Started

Before you write a line of code, confirm what you actually have. tadcka/tree has a last release of February 2017, zero dependents, and zero stars. The description references Laravel/Eloquent integration, but this package originates from the Symfony 2 / Tadcka CMS ecosystem. Clone the repo and read composer.json and src/ first — do not assume the Eloquent API described in the blurb exists as written.

Minimal path:

1. Install and inspect.

   composer require tadcka/tree
   

   If the constraint fails on your PHP version (likely on PHP 8+), vendor it as a path repository or fork it — you will almost certainly need to patch type hints and return types for modern PHP.

2. Read these first, in order:

   • composer.json — supported PHP range, autoload namespace, dependencies (this tells you whether it is Symfony- or Eloquent-oriented).
   • The node/model interfaces in src/ — these define what your domain entity must implement.
   • The manager/service class — this is where insert/move/delete logic lives.
   • Any existing tests — with a package this old, tests are often the only accurate documentation.

3. First use case: a menu or category tree. Create one root node, add two children, then query descendants. This exercises the full write → read path and will surface integration problems early (missing interface methods, incompatible parent type hints, autoloading).

4. Decide your storage strategy before modelling. The package predates modern Laravel tree packages, so confirm whether it expects an adjacency list (parent_id), a materialized path, or a nested set. Your migrations depend entirely on this — get it wrong and every subsequent move() will corrupt your tree.

If step 1–3 reveals that the Eloquent claims are aspirational, plan for a thin adapter layer between your Eloquent model and the package's interfaces rather than trying to make Eloquent itself satisfy them.

Implementation Patterns

Adapter over inheritance. The safest pattern for a 2017 package in a modern Laravel app is a wrapper: your Eloquent model stays clean, and a small adapter class implements the package's node contract by delegating to $model->parent_id, $model->children(), etc. This keeps the abandonment risk contained to one file.

class NodeAdapter implements TreeNodeInterface
{
    public function __construct(private Category $model) {}

    public function getParent(): ?self
    {
        return $this->model->parent
            ? new self($this->model->parent)
            : null;
    }

    public function getChildren(): iterable
    {
        return $this->model->children->map(fn ($c) => new self($c));
    }
}

Repository-shaped manager usage. If the package ships a tree manager, register it as a singleton in a service provider and inject it — do not instantiate it per call. Tree managers frequently cache the root or current node, and scattered instantiation leads to stale reads inside a single request.

Wrap every mutation in a transaction. Insert, move, and delete potentially touch multiple rows when maintaining path/depth columns:

DB::transaction(function () use ($manager, $node, $target) {
    $manager->move($node, $target); // or moveBefore/moveAfter
});

Eager-load for traversal. Recursive accessors will trigger N+1 queries. If you control the query, load the whole subtree in one go and traverse in memory:

$flat = Category::whereDescendantOf($root)->get(); // or your own closure-table/recursive CTE
$tree = $flat->toTree();                            // build hierarchy in PHP

Build nested-list rendering from depth/path data, not recursion. If the package exposes depth or path, a single ordered query plus str_repeat(' ', $depth) is dramatically cheaper than recursive relationship loading for menu output.

Integration tips:

• Keep tree write operations behind a service layer; let controllers only read.
• Add an observer or model event that invalidates any cached tree (menu caches go stale fast).
• Seed trees with the package's own insert API rather than raw inserts — it maintains depth/path invariants for you.
• If you need before/after insertion semantics, confirm the ordering column is unique-scoped to siblings; otherwise concurrent inserts produce ties.

Gotchas and Tips

The documentation/description does not match the package. The blurb promises Laravel/Eloquent integration and sibling/depth/path helpers. The repository is a Symfony-era component with no Laravel service provider. Treat the description as aspirational marketing, verify every method against src/, and budget time for writing your own Eloquent glue.

Abandonment is the headline risk. Last release 2017, zero stars, zero dependents means:

• No PHP 8 compatibility work has been done — expect implicit nullable deprecations, missing : void/: static return types, and possibly each()/create_function() in helpers.
• No security patches, no issue responses, no upstream fixes.
• Composer resolution may be blocked entirely; fork and require via "repositories": [{"type": "vcs", ...}].

Mutation is the dangerous surface. Move and delete are where trees corrupt. Test explicitly:

• Moving a node under its own descendant (must be rejected — check whether the package guards this).
• Deleting a node with children (cascade? orphan? re-parent? — the package may not decide for you).
• Concurrent moves inside a transaction; without row locking on the subtree, two moves can interleave.
• Root deletion and multi-root trees — clarify whether the package supports a forest or exactly one root.

Debugging tips:

• After any move, assert the invariant directly: re-query all nodes, reconstruct the tree in PHP, and diff against expectations. Write this as a test helper — you will use it repeatedly.
• If traversal returns duplicates or misses nodes, your parent_id/path data is inconsistent. Rebuild from a known-good source rather than patching.
• Log the generated SQL for insert/move operations early; you need to know exactly which columns the package maintains so your migrations match.

Config quirks to check:

• Column names (parent_id, position, path, depth) are often hard-coded in the package. If your schema differs, you may need to alias in SQL or fork.
• Some Tadcka-era components expected a specific DI container setup; in Laravel you will bind manually.
• Autoload namespace may be PSR-0 or PSR-4 with an old vendor path — verify before assuming use Tadcka\Tree\... works.

Extension points to prefer:

• Implement the package's interfaces rather than extending its concrete classes — abstract classes in old code are usually untestable.
• Keep an adapter boundary so you can swap to kalnoy/nestedset, staudenmeir/laravel-adjacency-list, or baum later without touching domain code. Given the package's status, plan the exit before you start.

Bottom line: viable as a learning reference or an internal, forked-and-patched dependency for an existing legacy app. For a new Laravel project, the maintenance cost almost certainly exceeds the benefit of picking it over a maintained tree package — but the interface-driven adapter pattern above lets you try it without betting the codebase on it.