PHP code example of telkins / laravel-dag-manager

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

telkins / laravel-dag-manager example snippets

$newEdges = dag()->createEdge($startVertex, $endVertex, $source);
// $newEdges contains all new edges, including the specified direct edge, that were created as a result of the request.

$deleted = dag()->deleteEdge($startVertex, $endVertex, $source);
// $deleted is true if any edges were deleted as a result of the request, false otherwise.

return [
    /**
     *-------------------------------------------------------------------------
     * Max Hops
     *-------------------------------------------------------------------------
     *
     * This value represents the maximum number of hops that are allowed where
     * hops "[i]ndicates how many vertex hops are necessary for the path; it is
     * zero for direct edges".
     *
     * The more hops that are allowed (and used), then the more DAG edges will
     * be created.  This will have an increasing impact on performance, space,
     * and memory.  Whether or not it's negligible, noticeable, or impactful
     * depends on a variety of factors.
     */
    'max_hops' => 5,

    /**
     *-------------------------------------------------------------------------
     * Default Database Connection Name
     *-------------------------------------------------------------------------
     *
     * This is the name of the database connection where the dag table
     * can be found.
     *
     * Set to `null` to use the default connection.
     */
    'default_database_connection_name' => null,

    /**
     *-------------------------------------------------------------------------
     * Table Name
     *-------------------------------------------------------------------------
     *
     * This is the name of the table where the dag structure
     * will be stored.
     */
    'table_name' => 'dag_edges',
];

use Illuminate\Database\Eloquent\Model;
use Telkins\Models\Traits\IsDagManaged;

class MyModel extends Model
{
    use IsDagManaged;

    // ...
}

$descendants = MyModel::dagDescendantsOf($myModel->id, 'my-source')->get();

$ancestors = MyModel::dagAncestorsOf($myModel->id, 'my-source')->get();

$ancestors = MyModel::dagRelationsOf($myModel->id, 'my-source')->get();

$descendants = MyModel::dagDescendantsOf($myModel->id, 'my-source', 0)->get();

$ancestors = MyModel::dagAncestorsOf($myModel->id, 'my-source', 1)->get();

namespace App\Models;

use Telkins\Models\DagEdge as BaseModel;

class MyDagEdge extends BaseModel
{
...

// config/laravel-dag-manager.php
...
'edge_model' => \App\Models\MyDagEdge::class,
...

bash
php artisan vendor:publish --provider="Telkins\Dag\Providers\DagServiceProvider" --tag="migrations"

bash
php artisan vendor:publish --provider="Telkins\Dag\Providers\DagServiceProvider" --tag="config"