tp5 使用paginate分页获取数据对象之后 如何对对象进行数据添加

tp5 使用paginate分页获取数据对象之后 如何对对象进行数据添加

大家都知道,在使用tp5的paginate获取分页数据之后,得到的是一个数据对象,但有时会碰到要对数据对象进行二次加工的情况,下面是解决此类问题的方法

1、直接在查询语句中利用MySQL函数

举例一:

1、将获取到的图片由相对地址拼接上域名,形成绝对地址

1  $yu = YU();
2  return $this->field('orderid,productid,attrid,concat("'.$yu.'", logo) logo,title')
3      ->where(['orderid'=>$OrderId])->paginate(10);

2、将时间戳转换成所需要的日期格式

1 return $this->where($where)->with('user')
2     ->field("*,FROM_UNIXTIME(createtime,'%Y-%m-%d') createtime")
3     ->order('createtime desc')
4     ->select();

关于时间戳与日期转换,请参考MySQL时间戳与日期互相转换

举例二:每个商品有不同的规格数据,统计每个商品所有规格的总库存

 1  $products = Db::name('product p')
 2     ->field('itemid,name,m_price,price,logo,sale_num,sort,is_sale,is_floor,addtime,update_time')
 3     ->field('(select sum(stock) from xf_product_attr a where a.product_id = p.itemid) stock_all')
 4     ->whereOr($keywordComplex)
 5     ->where($where)
 6     ->order('itemid asc list_order asc')
 7     ->paginate(10,false,[
 8        'query'=>[
 9            'keyword'  =>$keyword,
10            'is_sale'  =>$is_sale,
11            'is_floor' =>$is_floor,
12            'category' =>$category,
13        ]
14      ]);

举例三:获得某种商品券的兑换总数,使用左连接

1  return $this->with('shop')
2     ->alias('p')
3     ->join('order o','p.itemid = o.pro_id and o.status=2','left')
4     ->whereOr($whereOr)
5     ->where($where)
6     ->field('p.itemid,p.name,p.title,p.avatar,p.point,p.status,p.addtime,p.list_order, p.shop_id,p.check_status,count(*)')
7     ->order('p.addtime desc')
8     ->paginate(10,false,$query);

可以看到生成的sql的语句是

1 [ SQL ] SELECT p.itemid,p.name,p.title,p.avatar,p.point,p.status,p.addtime,p.list_order, p.shop_id,p.check_status,count(*) FROM `xf_product` `p` 
2         LEFT JOIN `xf_order` `o` ON `p`.`itemid`=o.pro_id and o.status=2 ORDER BY `p`.`addtime` DESC LIMIT 0,10 [ RunTime:0.000000s ]

可使用子查询,不过效率就下来了

1 return $this->with('shop')
2    ->alias('p')
3    ->whereOr($whereOr)
4    ->where($where)
5    ->field('*,(select count(*) from xf_order o where o.pro_id = p.itemid and o.status = 2)')
6    ->order('p.addtime desc')
7    ->paginate(10,false,$query);

生成的sql是这样的:

1 [ SQL ] SELECT *,(select count(*) from xf_order o where o.pro_id = p.itemid and o.status = 2) 
2         FROM `xf_product` `p` ORDER BY `p`.`addtime` DESC LIMIT 0,10 [ RunTime:0.014000s ]

2、还有一些复杂的,通过MySQL自带函数是实现不了的,此时可以将对象转换为数组,然后再处理

 1 } else {
 2     $products = Db::name('product p')
 3         ->field('itemid,name,m_price,price,logo,sale_num,sort,is_sale,is_floor,addtime,update_time')
 4         ->whereOr($keywordComplex)
 5         ->where($where)
 6         ->order('itemid asc list_order asc')
 7         ->paginate(10,false,[
 8             'query'=>[
 9                 'keyword'  =>$keyword,
10                 'is_sale'  =>$is_sale,
11                 'is_floor' =>$is_floor,
12                 'category' =>$category,
13             ]
14         ]);
15 }
16 
17 //查找商品自身的类别
18 $products->toArray();
19 foreach($products as $k=>$v){
20     $data = $v;
21     $data['category_id'] = Db::name('product_category_bind pb')
22         ->view('category pc','id,name','pb.category_id = pc.id','left')
23         ->where(['pb.product_id'=>$v['itemid']])
24         ->select()->toArray();
25     $products->offsetSet($k,$data);
26 }
原文地址:https://www.cnblogs.com/cyfblogs/p/10083260.html