Laravel4: WhereHas Eloquent Issue (nested). callback function error - orm

Question

I tried doing a search function where the only field would be an <input type='text' /> it'll be stripped into an array() then passed to a whereLoop.
static function generateSearch($fields, $queryString)
{
return function($query) use($queryString, $fields)
{
foreach($fields as $field) {
$query = $query->orWhere($field, 'like', $queryString);
}
$query = $query->whereHas('category', function($_query) use ($queryString)
{
$_query->where('name','like',$queryString);
});
};
}
public static function search($query)
{
$searchBits = explode(' ', $query);
$query = Lead::with(array('user', 'category'));
$ctr = 0;
if(Category::whereIn('name', $searchBits)->count() != 0) {
$query = $query->whereHas('category', function($query) use ($searchBits)
{
$ctr = 0;
foreach($searchBits as $bit) {
$bit = "%".$bit."%";
$callback = "orWhere";
$queryFunc = Lead::generateSearch(array('name'), $bit);
if($ctr == 0) {
$callback = "where";
}
$query = $query->$callback($queryFunc);
}
});
}else {
foreach($searchBits as $bit) {
$bit = "%".$bit."%";
$callback = "orWhere";
$queryFunction = Lead::generateSearch(array('name', 'website', 'name', 'email'), $bit);
if($ctr == 0) {
$callback = "where";
}
$query = $query->$callback($queryFunction);
$ctr++;
}
}
$query = $query->orderBy('id','desc');
return $query;
}
Category only has ONE row as of the moment: its - "hot"
if i type in any keyword, it'll directly go to generateSearch()
but if i type in "hot", it'll send an error
Call to undefined method
Illuminate\Database\Query\Builder::category()
does anybody know what's up?

Answer 1

found the error. after looking deep within the callstack. i should not have added the
$query = $query->whereHas('category', function($_query) use ($queryString)
{
$_query->where('name','like',$queryString);
});
inside the generateSearch() or i should create another function for it. its being called by category callback as well.