Yii提供了一个gii工具, 它是一个代码生成器工具。它为你提供了CRUD的生成代码。我们将学习如何使用gii生成CRUD。
这里显示了一个简单的示例来生成粗粒。我们将Yii2文件夹命名为crud。我们的表名是雇员。
步骤1打开Gii
在浏览器中, 键入以下内容：http：//localhost/crud/frontend/web/index.php？r = gii
文章图片
步骤2产生模型
文章图片
查看上面的快照, 输入表名称(在本例中为employee)。将生成员工模型类。向下滚动页面, 然后单击预览按钮。
文章图片
查看上面的snpashot, 单击” 生成” 按钮以生成代码。
文章图片
你将看到如上所示的成功消息。
步骤2产生CRUD
文章图片
看一下上面的快照,
在模型类中, 生成路径为frontend \ models \ Employees的雇员文件。
在搜索模型类中, 生成带有路径frontend \ controllers \ EmployeesSearch的EmployeesSearch文件。
在Controller类中, 生成路径为@frontend \ views \ Employees的EmployeesController文件。
单击预览按钮以检查错误。如果没有错误, 请单击” 生成” 按钮以生成代码。再次, 你将获得成功的消息以进行代码生成。
现在, 我们的CRUD已成功生成。要检查它, 请在浏览器上使用URL http：//localhost/crud/frontend/web/index.php？r = employees /
文章图片
查看上面的快照, Employees是我们的表名, 你可以从该表中搜索条目。
要在表中插入值, 请单击创建员工按钮。将出现以下页面。
文章图片
填写上面的详细信息, 然后单击” 创建” 按钮。数据将被插入到表employees中。
文章图片
查看上面的快照, 我们在表中填写了一些条目。在这里, 你可以看到查看, 更新和删除的图标。
单击” 查看” 图标时, 将出现包含约翰信息的下一页。
文章图片
单击” 更新” 图标后, 将出现包含John信息的下一页, 你可以在其中进行任何编辑。进行更改后, 单击更新按钮。
文章图片
单击删除图标后, 将出现以下框, 要求你删除它。
文章图片
生成的代码 在控制器中, 文件EmployeesController.php将具有以下代码。
<
?php namespace frontend\controllers;
use Yii;
use frontend\models\Employees;
use frontend\models\EmployeesSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
/** * EmployeesController implements the CRUD actions for Employees model. */ class EmployeesController extends Controller { /** * @inheritdoc */ public function behaviors() { return [ 'verbs' =>
[ 'class' =>
VerbFilter::className(), 'actions' =>
[ 'delete' =>
['POST'], ], ], ];
} /** * Lists all Employees models. * @return mixed */ public function actionIndex() { $searchModel = new EmployeesSearch();
$dataProvider = $searchModel->
search(Yii::$app->
request->
queryParams);
return $this->
render('index', [ 'searchModel' =>
$searchModel, 'dataProvider' =>
$dataProvider, ]);
} /** * Displays a single Employees model. * @param integer $id * @return mixed */ public function actionView($id) { return $this->
render('view', [ 'model' =>
$this->
findModel($id), ]);
} /** * Creates a new Employees model. * If creation is successful, the browser will be redirected to the 'view' page. * @return mixed */ public function actionCreate() { $model = new Employees();
if ($model->
load(Yii::$app->
request->
post()) &
&
$model->
save()) { return $this->
redirect(['view', 'id' =>
$model->
id]);
} else { return $this->
render('create', [ 'model' =>
$model, ]);
} } /** * Updates an existing Employees model. * If update is successful, the browser will be redirected to the 'view' page. * @param integer $id * @return mixed */ public function actionUpdate($id) { $model = $this->
findModel($id);
if ($model->
load(Yii::$app->
request->
post()) &
&
$model->
save()) { return $this->
redirect(['view', 'id' =>
$model->
id]);
} else { return $this->
render('update', [ 'model' =>
$model, ]);
} } /** * Deletes an existing Employees model. * If deletion is successful, the browser will be redirected to the 'index' page. * @param integer $id * @return mixed */ public function actionDelete($id) { $this->
findModel($id)->
delete();
return $this->
redirect(['index']);
} /** * Finds the Employees model based on its primary key value. * If the model is not found, a 404 HTTP exception will be thrown. * @param integer $id * @return Employees the loaded model * @throws NotFoundHttpException if the model cannot be found */ protected function findModel($id) { if (($model = Employees::findOne($id)) !== null) { return $model;
} else { throw new NotFoundHttpException('The requested page does not exist.');
} } }在模型中, 文件Employees.php将具有以下代码。
<
?php namespace frontend\models;
use Yii;
/** * This is the model class for table "employees". * * @property integer $id * @property string $name * @property string $designation * @property integer $contact * @property string $email */ class Employees extends \yii\db\ActiveRecord { /** * @inheritdoc */ public static function tableName() { return 'employees';
} /** * @inheritdoc */ public function rules() { return [ [['name', 'designation', 'contact', 'email'], 'required'], [['contact'], 'integer'], [['name'], 'string', 'max' =>
20], [['designation'], 'string', 'max' =>
50], [['email'], 'string', 'max' =>
80], ];
} /** * @inheritdoc */ public function attributeLabels() { return [ 'id' =>
'ID', 'name' =>
'Name', 'designation' =>
'Designation', 'contact' =>
'Contact', 'email' =>
'Email', ];
} }在模型中, 文件EmployeesSearch.php将具有以下代码。
<
?php namespace frontend\models;
use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use frontend\models\Employees;
/** * EmployeesSearch represents the model behind the search form about `frontend\models\Employees`. */ class EmployeesSearch extends Employees { /** * @inheritdoc */ public function rules() { return [ [['id', 'contact'], 'integer'], [['name', 'designation', 'email'], 'safe'], ];
} /** * @inheritdoc */ public function scenarios() { // bypass scenarios() implementation in the parent class return Model::scenarios();
} /** * Creates data provider instance with search query applied * * @param array $params * * @return ActiveDataProvider */ public function search($params) { $query = Employees::find();
// add conditions that should always apply here $dataProvider = new ActiveDataProvider([ 'query' =>
$query, ]);
$this->
load($params);
if (!$this->
validate()) { // uncomment the following line if you do not want to return any records when validation fails // $query->
where('0=1');
return $dataProvider;
} // grid filtering conditions $query->
andFilterWhere([ 'id' =>
$this->
id, 'contact' =>
$this->
contact, ]);
$query->
andFilterWhere(['like', 'name', $this->
name]) ->
andFilterWhere(['like', 'designation', $this->
designation]) ->
andFilterWhere(['like', 'email', $this->
email]);
return $dataProvider;
} }在视图中, 文件view.php将具有以下代码。
<
?php use yii\helpers\Html;
use yii\widgets\DetailView;
/* @var $this yii\web\View */ /* @var $model frontend\models\Employees */ $this->
title = $model->
name;
$this->
params['breadcrumbs'][] = ['label' =>
'Employees', 'url' =>
['index']];
$this->
params['breadcrumbs'][] = $this->
title;
?>
<
div class="employees-view">
<
h1>
<
?= Html::encode($this->
title) ?>
<
/h1>
<
p>
<
?= Html::a('Update', ['update', 'id' =>
$model->
id], ['class' =>
'btn btn-primary']) ?>
<
?= Html::a('Delete', ['delete', 'id' =>
$model->
id], [ 'class' =>
'btn btn-danger', 'data' =>
[ 'confirm' =>
'Are you sure you want to delete this item?', 'method' =>
'post', ], ]) ?>
<
/p>
<
?= DetailView::widget([ 'model' =>
$model, 'attributes' =>
[ 'id', 'name', 'designation', 'contact', 'email:email', ], ]) ?>
<
/div>
在视图中, 文件form.php将具有以下代码。
<
?php use yii\helpers\Html;
use yii\widgets\ActiveForm;
/* @var $this yii\web\View */ /* @var $model frontend\models\Employees */ /* @var $form yii\widgets\ActiveForm */ ?>
<
div class="employees-form">
<
?php $form = ActiveForm::begin();
?>
<
?= $form->
field($model, 'name')->
textInput(['maxlength' =>
true]) ?>
<
?= $form->
field($model, 'designation')->
textInput(['maxlength' =>
true]) ?>
<
?= $form->
field($model, 'contact')->
textInput() ?>
<
?= $form->
field($model, 'email')->
textInput(['maxlength' =>
true]) ?>
<
div class="form-group">
<
?= Html::submitButton($model->
isNewRecord ? 'Create' : 'Update', ['class' =>
$model->
isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
<
/div>
<
?php ActiveForm::end();
?>
<
/div>
在视图中, 文件search.php将具有以下代码。
<
?php use yii\helpers\Html;
use yii\widgets\ActiveForm;
/* @var $this yii\web\View */ /* @var $model frontend\models\EmployeesSearch */ /* @var $form yii\widgets\ActiveForm */ ?>
<
div class="employees-search">
<
?php $form = ActiveForm::begin([ 'action' =>
['index'], 'method' =>
'get', ]);
?>
<
?= $form->
field($model, 'id') ?>
<
?= $form->
field($model, 'name') ?>
<
?= $form->
field($model, 'designation') ?>
<
?= $form->
field($model, 'contact') ?>
<
?= $form->
field($model, 'email') ?>
<
div class="form-group">
<
?= Html::submitButton('Search', ['class' =>
'btn btn-primary']) ?>
<
?= Html::resetButton('Reset', ['class' =>
'btn btn-default']) ?>
<
/div>
<
?php ActiveForm::end();
?>
<
/div>
在视图中, 文件create.php将具有以下代码。
<
?php use yii\helpers\Html;
/* @var $this yii\web\View */ /* @var $model frontend\models\Employees */ $this->
title = 'Create Employees';
$this->
params['breadcrumbs'][] = ['label' =>
'Employees', 'url' =>
['index']];
$this->
params['breadcrumbs'][] = $this->
title;
?>
<
div class="employees-create">
<
h1>
<
?= Html::encode($this->
title) ?>
<
/h1>
<
?= $this->
render('_form', [ 'model' =>
$model, ]) ?>
<
/div>
在视图中, 文件index.php将具有以下代码。
<
?php use yii\helpers\Html;
use yii\grid\GridView;
/* @var $this yii\web\View */ /* @var $searchModel frontend\models\EmployeesSearch */ /* @var $dataProvider yii\data\ActiveDataProvider */ $this->
title = 'Employees';
$this->
params['breadcrumbs'][] = $this->
title;
?>
<
div class="employees-index">
<
h1>
<
?= Html::encode($this->
title) ?>
<
/h1>
<
?php // echo $this->
render('_search', ['model' =>
$searchModel]);
?>
<
p>
<
?= Html::a('Create Employees', ['create'], ['class' =>
'btn btn-success']) ?>
<
/p>
<
?= GridView::widget([ 'dataProvider' =>
$dataProvider, 'filterModel' =>
$searchModel, 'columns' =>
[ ['class' =>
'yii\grid\SerialColumn'], 'id', 'name', 'designation', 'contact', 'email:email', ['class' =>
'yii\grid\ActionColumn'], ], ]);
?>
<
/div>
在视图中, 文件update.php将具有以下代码。
<
?php use yii\helpers\Html;
/* @var $this yii\web\View */ /* @var $model frontend\models\Employees */ $this->
title = 'Update Employees: ' . $model->
name;
$this->
params['breadcrumbs'][] = ['label' =>
'Employees', 'url' =>
['index']];
$this->
params['breadcrumbs'][] = ['label' =>
$model->
name, 'url' =>
['view', 'id' =>
$model->
id]];
$this->
params['breadcrumbs'][] = 'Update';
?>
<
div class="employees-update">
<
h1>
<
?= Html::encode($this->
title) ?>
<
/h1>
<
?= $this->
render('_form', [ 'model' =>
$model, ]) ?>
<
/div>
【Yii CRUD数据库操作实例图解】下载此示例
推荐阅读
- YII控制器介绍和用法示例
- Linux安装YII详细步骤图解（最全面）
- Yii2快速安装简要步骤
- YII教程入门介绍
- Yii项目结构详细解释
- 使用Charles对Android App的https请求进行抓包
- Android ANR 分析
- Android activity间通讯几种方式
- 在Android studio 中使用单例模式