Self join in Laravel
Question
I am trying to build a self join in Laravel. I wish to compare 2 columns in the same table.
When I write this in my controller:
$char_name_obj = User::find($user->id)->characters()->where('lord_id', '=', 'id')->get();
lord_id is one column, id is the other column in the same table named characters. This returns nothing. I am sure I need to do a self join to be able to achieve this.
Character model:
class Character extends Eloquent {
protected $table = 'characters';
protected $fillable = array('lord_id','char_name', 'char_dynasty', 'picture');
public function user()
{
return $this->belongsTo('User');
}
public function Titles()
{
return $this->hasMany('Title');
}
public function LordCharID()
{
return $this->has_one('Character');
}
}
I don't know how to use the last function LordCharID()
.
Solution
has_one is the Laravel 3 function; so if you're using Laravel 4, you need to use hasOne
You can use whereRaw to compare columns:
User::find($user->id)->characters()->whereRaw('lord_id = id')->get();
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