not fetching data from database - mysql

Question

Here i have a list of same category names which comes under different parent category.when i fetch the data according to the id am getting result because id is different for all but when i fetch by category name am getting only the first results even though i have two same category names under different parent category..here is my category table
id category_name parent_id
8 men 0
9 kids 0
10 T-shirts 8
11 Shirts 8
12 Jeans 8
13 Pants 8
14 Shorts 8
15 Tees 9
16 Shirts 9
17 Jeans 9
18 Pants 9
Here am having shirts as the category name under different parent_id.when i select the id of 16-shirts am getting the value of of id 11-shirts because of the same category name.
Here is the controller am using
public function men_clothing_image($category=null)
{
$category_id =$this->roxmodel->get_category_id($category);
$data['active_mn']='men_clothing';
$data['men']=$this->roxmodel->get_category_by_parent($p_id=8);
$data['kids']=$this->roxmodel->get_category_by_parent($p_id=9);
$config['base_url'] = base_url().'men-'.$category;
$config['per_page'] = 2;
$config['uri_rsegment'] = 4;
$config['use_page_numbers'] = TRUE;
$config['total_rows'] = $this->roxmodel->count_category_images($category_id);
$data['galllery']=$this->roxmodel->get_gallery_men_images($category_id,$config['per_page'],$this->uri->rsegment(4));
$this->load->library('pagination',$config);
$data['page_links'] = $this->pagination->create_links();
$this->load->view('men_clothing_image',$data);
}
Here is the model am passing
public function get_category_id($category_name)
{
$this->db->select('category.id');
$this->db->where('category.category_name',$category_name);
$result = $this->db->get('category')->row();
if($result)
{
return $result->id;
}
}
i had done self join for connecting the id and category name but the output was null
public function get_category_id($category_name)
{
$this->db->select('c.id');
$this->db->join('category c1','c.id=c1.category_name');
$this->db->where('c1.category_name',$category_name);
$result = $this->db->get('category c')->row();
if($result)
{
return $result->id;
}
}
count image function as follows..
public function count_category_images($p_id)
{
$this->db->select('gallery.*','category.category_name');
$this->db->join('category', 'category.id = gallery.category_id');
$this->db->where('category.id',$p_id);
$this->db->order_by('gallery.id','desc');
return $this->db->count_all_results('gallery');
}

Answer 1

You have to use result() or result_array(). Because there are several rows in result.
row() - This function returns a single result row.
result() - This function returns the query result as an array of objects, or an empty array on failure.
So, try
public function get_category_id($category_name)
{
$this->db->select('category.id');
$this->db->join('category c1','c.id=c1.category_name');
$this->db->where('category.category_name',$category_name);
$result = $this->db->get('category')->result();
return $result;
}
Also you can use
if ($query->num_rows() > 0)
to check if there are rows.
If you use, search, and use part of category name, use LIKE interms of WHERE.

Answer 2

try to use like query
If you want to control where the wildcard (%) is placed, you can use an optional third argument. Your options are 'before', 'after' and 'both'
and try group by
public function get_category_id($category_name)
{
$this->db->select('category.id');
$this->db->like('category.category_name',$category_name,'both');
$this->db->group_by(array("category.id", "category.category_name","category.parent_id"));
$result = $this->db->get('category')->result_array();
if($result)
{
print_r($result);
exit;
// return $result;
}
}