<?php namespace Util\data; use think\Db; class Sysdb{ // 指定表名 public function table($table){ $this->where = array(); $this->field = '*'; $this->order = ''; $this->table = $table; return $this; } // 指定查询字段 public function field($field = '*'){ $this->field = $field; return $this; } // 排序 public function order($order){ $this->order = $order; return $this; } // 指定查询条件 public function where($where = array()){ $this->where = $where; return $this; } public function group($group){ $this->group = $group; return $this; } //$products = $this->db->table('product')->field('name,SUM(price) AS prices')->group('name')->select(); public function products(){ $products = Db::name($this->table)->field($this->field)->group($this->group)->select(); return $products ? $products : false; } // 返回一条记录 public function item(){ $item = Db::name($this->table)->field($this->field)->where($this->where)->find(); return $item ? $item : false; } // 返回list public function lists(){ $query = Db::name($this->table)->field($this->field)->where($this->where); $this->order && $query = $query->order($this->order); $lists = $query->select(); return $lists ? $lists : false; } // 自定义索引列表 public function cates($index){ $query = Db::name($this->table)->field($this->field)->where($this->where); $this->order && $query = $query->order($this->order); $lists = $query->select(); if(!$lists){ return false; } $results = []; foreach ($lists as $key => $value) { $results[$value[$index]] = $value; } return $results; } // 分页 public function pages($pageSize = 10){ $total = Db::name($this->table)->where($this->where)->count(); $query = Db::name($this->table)->field($this->field)->where($this->where); $this->order && $query = $query->order($this->order); $data = $query->paginate($pageSize,$total); return array('total'=>$total,'lists'=>$data->items(),'pages'=>$data->render()); } // 添加 public function insert($data){ $res = Db::name($this->table)->insert($data); return $res; } // 修改 public function update($data){ $res = Db::name($this->table)->where($this->where)->update($data); return $res; } // 删除 public function delete(){ $res = Db::name($this->table)->where($this->where)->delete(); return $res; } } <?php /** * Created by PhpStorm. * User: Administrator * Date: 2018-08-10 * Time: 16:50 */ namespace app\index\controller; use think\Controller; use app\index\model\Product as ProductModel; class Product extends Controller { public function query(){ $products = ProductModel::field('name,SUM(price) AS prices')->group('name')->select(); // $product = ProductModel::all(); // $pro = ProductModel::sum('price'); // dump($products); foreach ($products as $product) { echo '名称:'.$product->name.'<br>'; echo '价格:'.$product->prices.'<br>'; } } }
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