laravel-pivot-seeder.php

<?php

use Illuminate\Database\Seeder;

class PostTagTableSeeder extends Seeder
{
    /**
     * @var
     */
    private $pivotData = [];
    /**
     * @var
     */
    private $totalValues = 9;
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        NameSpaceHere\PostTag::truncate();
        //-- lets create some random pivot values
        for ($x = 0; $x <= $this->totalValues; $x++) {
          //-- get a new pivot value
          $new_pivot_value = self::newPivot();
          //-- lets add ot to the array for validation
          array_push($this->pivotData,$new_pivot_value);
          //-- add pivot data to db
          DB::table('post_tag')->insert([
              'post_id' => $new_pivot_value[0],
              'tag_id' => $new_pivot_value[1]
            ]);
        }

    }

    /**
     * Get unique pivot values
     */
    function newPivot(){
      $pivot_value = self::getData();
      $result = self::in_array_r($pivot_value, $this->pivotData);
      //-- if its a duplicate then re-run method
      if($result) return self::newPivot();

      return $pivot_value;
    }
    /**
     * Get the fake data
     */
    function getData(){
      $faker =  Faker\Factory::create();

      $postsId =  $faker->randomElement(NameSpaceHere\Post::lists('id')->toArray());
      $tagsId =  $faker->randomElement(NameSpaceHere\Tag::lists('id')->toArray());

        return [
          (Int)$postsId,
          (Int)$tagsId
        ];
    }
    /**
     * check the new value with currently set picot values already set
     */
    function in_array_r($needle, $haystack, $strict = false) {
        foreach ($haystack as $item) {
            if (($strict ? $item === $needle : $item == $needle) || (is_array($item) 
                && self::in_array_r($needle, $item, $strict))) {
                return true;
            }
        }

        return false;
    }
    
}