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                # 數據查詢 ``` public function index() { // 查詢數據一條 // get()方法傳入查詢的id $res1 = User::get(1); $res2 = User::get(function ($query){ $query->where('username','eq','000066') ->field('username, email'); }); // where方法 $res3 = User::where('id',43)->field('id, username')->find(); // 查詢多條 查詢的數據是一個對象 $res4 = User::all([22,29,54]); foreach ($res4 as $val) { //dump($val->toArray()); } $res5 = User::all(function ($query){ $query->where("id", '<', 26) ->field('id, username, email'); }); foreach ($res5 as $val) { //dump($val->toArray()); } $res6 = User::where('id','<',26)->select(); foreach ($res6 as $val) { //dump($val->toArray()); } // 獲取某個字段 value() $res7 = User::where('id',22)->value('email'); //echo $res7; // 獲取某一列中的全部字段,第一個參數要獲取的字段,第二個參數為數組的下表 $res8 = User::column("email","username"); dump($res8); } ``` ***** # 添加數據 ~~~ public function index() { // create()方法 $res = User::create([ 'username' => 'admin', 'password' => md5(sha1('admin')), 'email' => 'admin@qq.com', 'num' => 100 ],['username', 'email']); // 僅允許添加username和email字段 dump($res->id); // 獲取添加數據的id dump($res); // save()方法需要先實例化模型 $userModel = new User(); $userModel->username = 'admin'; $userModel->email = 'admin@qq.com'; $userModel->save(); dump($userModel->id); // 獲取添加數據的id dump($userModel); // save()方法的其他寫法 $userModel = new User(); // allowField過濾掉不存在的字段如果為allowField(['username'])則只添加username字段 $res = $userModel->allowField(true) ->save([ 'username' => 'admin', 'password' => md5('admin') ]); dump($res->id); // 獲取添加數據的id dump($res); } ~~~ ***** # 更新數據 ~~~ // update方法適用于不需要驗證的數據如果下面的代碼執行2次看不出是否數據有改變 $res = User::update([ 'id' => 1, 'username' => 'admin' ],function($query){ $query->where("id","LT",5) // id小于5 }); //$res = User::where('id',1)->update(['username'=>'admin']); ~~~
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