Laravel many-to-many relation required unexpected table name

Question

I have two tables with many-to-many relation

class Psychologist extends Model 
{

public function specs()
{
    return $this->belongsToMany('App\Models\Spec');
}

public function methods()
{
    return $this->belongsToMany('App\Models\Method');
}

}

Its working fine on saving first relation 'App\Models\Spec' $psy->specs()->attach(explode(',',$data['spec'])); with table name 'psychologist_spec' and get exception of incorrect table 'method_psychologist' instead of 'psychologist_method'

public function save(Request $req)
    {
        $data = $req->all();
        $psy = Psychologist::create($data);
        $psy->specs()->attach(explode(',',$data['spec']));
        $psy->methods()->attach(explode(',',$data['methods'])); 
    }

I know that i can explicitly indicate table name like

 public function methods()
    {
        return $this->belongsToMany('App\Models\Method', 'psychologist_method');
    }

but cant understand why it working in the first case and doesnt in the second

Answer 1

Eloquent will join the two related model names in alphabetical order