[Symfony\Component\Debug\Exception\FatalThrowableError] Class name must be a valid object or a string

[phuongphally]

[Symfony\Component\Debug\Exception\FatalThrowableError]
Class name must be a valid object or a string

when using

$admin->attachPermission($createPost);
// equivalent to $admin->permissions()->attach([$createPost->id]);

$owner->attachPermissions([$createPost, $editUser]);
// equivalent to $owner->permissions()->attach([$createPost->id, $editUser->id]);

$owner->syncPermissions([$createPost, $editUser]);
// equivalent to $owner->permissions()->sync([$createPost->id, $editUser->id]);

[KKSzymanowski]

Take a look at Laravel logs to find which line causes it and what is the backtrace.

[phuongphally]

[2017-04-07 07:28:18] local.ERROR: Symfony\Component\Debug\Exception\FatalThrowableError: Class name must be a valid object or a string in C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Concerns\HasRelationships.php:487
Stack trace:
#0 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Concerns\HasRelationships.php(304): Illuminate\Database\Eloquent\Model->newRelatedInstance(NULL)
#1 C:\xampp\htdocs\Wegorder\app\Models\Role\Traits\Relationship\RoleRelationship.php(23): Illuminate\Database\Eloquent\Model->belongsToMany(NULL, NULL, 'role_id', 'permission_id')
#2 C:\xampp\htdocs\Wegorder\vendor\santigarcor\laratrust\src\Laratrust\Traits\LaratrustRoleTrait.php(160): App\Models\Role\Role->permissions()
#3 C:\xampp\htdocs\Wegorder\database\seeds\DatabaseRolePermissionDatabaseSeeder.php(35): Laratrust\LaratrustRole->attachPermission(Object(App\Models\Permission\Permission))
#4 [internal function]: DatabaseRolePermissionDatabaseSeeder->run()
#5 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(29): call_user_func_array(Array, Array)
#6 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container{closure}()
#7 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(Illuminate\Foundation\Application), Array, Object(Closure))
#8 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\Container.php(531): Illuminate\Container\BoundMethod::call(Object(Illuminate\Foundation\Application), Array, Array, NULL)
#9 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Seeder.php(103): Illuminate\Container\Container->call(Array)
#10 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Seeder.php(37): Illuminate\Database\Seeder->__invoke()
#11 C:\xampp\htdocs\Wegorder\database\seeds\DatabaseSeeder.php(28): Illuminate\Database\Seeder->call('DatabaseRolePer...')
#12 [internal function]: DatabaseSeeder->run()
#13 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(29): call_user_func_array(Array, Array)
#14 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container{closure}()
#15 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(Illuminate\Foundation\Application), Array, Object(Closure))
#16 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\Container.php(531): Illuminate\Container\BoundMethod::call(Object(Illuminate\Foundation\Application), Array, Array, NULL)
#17 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Seeder.php(103): Illuminate\Container\Container->call(Array)
#18 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Console\Seeds\SeedCommand.php(63): Illuminate\Database\Seeder->__invoke()
#19 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Concerns\GuardsAttributes.php(122): Illuminate\Database\Console\Seeds\SeedCommand->Illuminate\Database\Console\Seeds{closure}()
#20 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Console\Seeds\SeedCommand.php(64): Illuminate\Database\Eloquent\Model::unguarded(Object(Closure))
#21 [internal function]: Illuminate\Database\Console\Seeds\SeedCommand->fire()
#22 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(29): call_user_func_array(Array, Array)
#23 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container{closure}()
#24 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(Illuminate\Foundation\Application), Array, Object(Closure))
#25 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\Container.php(531): Illuminate\Container\BoundMethod::call(Object(Illuminate\Foundation\Application), Array, Array, NULL)
#26 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Console\Command.php(182): Illuminate\Container\Container->call(Array)
#27 C:\xampp\htdocs\Wegorder\vendor\symfony\console\Command\Command.php(265): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArrayInput), Object(Illuminate\Console\OutputStyle))
#28 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Console\Command.php(167): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArrayInput), Object(Illuminate\Console\OutputStyle))
#29 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Console\Command.php(197): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArrayInput), Object(Illuminate\Console\OutputStyle))
#30 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Console\Migrations\RefreshCommand.php(129): Illuminate\Console\Command->call('db:seed', Array)
#31 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Console\Migrations\RefreshCommand.php(68): Illuminate\Database\Console\Migrations\RefreshCommand->runSeeder(NULL)
#32 [internal function]: Illuminate\Database\Console\Migrations\RefreshCommand->fire()
#33 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(29): call_user_func_array(Array, Array)
#34 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container{closure}()
#35 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(Illuminate\Foundation\Application), Array, Object(Closure))
#36 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Container\Container.php(531): Illuminate\Container\BoundMethod::call(Object(Illuminate\Foundation\Application), Array, Array, NULL)
#37 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Console\Command.php(182): Illuminate\Container\Container->call(Array)
#38 C:\xampp\htdocs\Wegorder\vendor\symfony\console\Command\Command.php(265): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
#39 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Console\Command.php(167): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
#40 C:\xampp\htdocs\Wegorder\vendor\symfony\console\Application.php(826): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#41 C:\xampp\htdocs\Wegorder\vendor\symfony\console\Application.php(189): Symfony\Component\Console\Application->doRunCommand(Object(Illuminate\Database\Console\Migrations\RefreshCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#42 C:\xampp\htdocs\Wegorder\vendor\symfony\console\Application.php(120): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#43 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Foundation\Console\Kernel.php(123): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#44 C:\xampp\htdocs\Wegorder\artisan(35): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#45 {main}

[KKSzymanowski]

Can't you do some research on you own?
You're probably missing config entries for laratrust.permission and laratrust.permission_role_table.

P. S. Wrap anything that contains a hashtag(#) in code blocks(```). You just referenced 45 issues and pull requests for no reason.
For example:

[2017-04-07 07:28:18] local.ERROR: Symfony\Component\Debug\Exception\FatalThrowableError: Class name must be a valid object or a string in C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Concerns\HasRelationships.php:487
Stack trace:
#0 C:\xampp\htdocs\Wegorder\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Concerns\HasRelationships.php(304): Illuminate\Database\Eloquent\Model->newRelatedInstance(NULL)
#1 C:\xampp\htdocs\Wegorder\app\Models\Role\Traits\Relationship\RoleRelationship.php(23): Illuminate\Database\Eloquent\Model->belongsToMany(NULL, NULL, 'role_id', 'permission_id')
...

You can also attach a file to a GitHub comment.