Php CodeIgniter SQL用于从不同表获取数据的正确格式
我对Codeigniter是个新手。我有一个问题,我的查询似乎不起作用。是因为我的格式吗 型号Php CodeIgniter SQL用于从不同表获取数据的正确格式,php,mysql,codeigniter,Php,Mysql,Codeigniter,我对Codeigniter是个新手。我有一个问题,我的查询似乎不起作用。是因为我的格式吗 型号 $this->db->select('*'); $this->db->from(' store_products, products, category, subcategory, store, store_products_category'); $this->db->where('store_product
$this->db->select('*');
$this->db->from('
store_products,
products,
category,
subcategory,
store,
store_products_category');
$this->db->where('store_products_category.store_id', $marketid);
$this->db->where('store_products_category.subcategory_id', 'subcategory.subcategory_id');
$this->db->where('subcategory.category_id', 'category.category_id');
$this->db->where('store_products_category.storeprod_id', 'store_products.storeprod_id');
$this->db->where('store_products.prod_id', 'products.prod_id');
$this->db->where('store_products_category.store_id', 'store.store_id');
$query = $this->db->get();
$result = $query->row();
return $result;
控制器
if($marketinfo = $this->MarketModel->getInfobyID($marketid)){
$data['marketinfolist'] = $marketinfo;
$this->load->view('layouts/header', $data);
$this->load->view('clickbasket',$data);
$this->load->view('navigation/mainfooter');
$this->load->view('layouts/footer');
}
它似乎无法从模型中返回任何内容。我已经尝试过直接在phpmyadmin上执行查询,它工作得非常好。如果我正确理解了您的问题,那么它是由于应用了不正确的联接而发生的,并且代码点火器无法生成正确的查询。试试这个:
$query = $this->db->select('*')
->from('store_products')
->join('products', 'store_products.prod_id = products.prod_id')
->join('store_products_category', 'store_products_category.storeprod_id = store_products.storeprod_id')
->join('subcategory', 'store_products_category.subcategory_id = subcategory.subcategory_id');
->join('category', 'subcategory.category_id = category.category_id')
->join('store', 'store_products_category.store_id = store.store_id')
->where('store_products_category.store_id', $marketid)
->get();
$result = $query->row();
另外,您可以通过以下语句在浏览器上打印查询,然后在mysql中复制并执行以进行测试:
echo $this->db->last_query();
它打印当前模型执行的最新查询。您需要加入表以获得正确的结果…如下所示 您的型号:
$query = $this->db->select('*')
->from('store_products')
->join('products', 'store_products.prod_id = products.prod_id')
->join('store_products_category', 'store_products_category.storeprod_id = store_products.storeprod_id')
->join('subcategory', 'store_products_category.subcategory_id = subcategory.subcategory_id');
->join('category', 'subcategory.category_id = category.category_id')
->join('store', 'store_products_category.store_id = store.store_id')
->where('store_products_category.store_id', $marketid)
->get();
$result = $query->row();
return $result;
在你的控制器上
function getMarketInfo($marketid)
{
if(!empty($marketid)){
$marketinfo = $this->MarketModel->getInfobyID($marketid);
$data['marketinfolist'] = $marketinfo;
$this->load->view('layouts/header', $data);
$this->load->view('clickbasket',$data);
$this->load->view('navigation/mainfooter');
$this->load->view('layouts/footer');
}
}
谢谢,现在一切正常:)只需调整$query->row()部分