Eloquent Parent-Child relationship on same model

Question

I have a model CourseModule, and each of the items are related to the same model.

Database Structure:

Relation in Model:

Answer 1

here is the answer that can help you

I think you you have to do it recursively to retrieve whole tree:

$data = CourseModule::with('child_rec');

Recursive function

This may help you according to your requirement,

public function child()
{
   return $this->hasMany('App\CourseModule', 'parent');
}
public function children_rec()
{
   return $this->child()->with('children_rec');
   // which is equivalent to:
   // return $this->hasMany('App\CourseModule', 'parent')->with('children_rec);
}
// parent
public function parent()
{
   return $this->belongsTo('App\CourseModule','parent');
}

// all ascendants
public function parent_rec()
{
   return $this->parent()->with('parent_rec');
}