如何使用 Yii 2 ActiveRecord 做 IS NULL 和 IS NOT NULL? [英] How to do IS NULL and IS NOT NULL with Yii 2 ActiveRecord?

问题描述

我有一个表，它有一个字段 `activated_at` timestamp NULL DEFAULT NULL，这意味着它可以包含一个时间戳或者它可以是 null 并且它是 null 默认情况下.

I have a table which has a field `activated_at` timestamp NULL DEFAULT NULL, which means that it can contain a timestamp or it can be null and it's null by default.

我有另一个 [gii-generated] 搜索模型，在 search() 方法中具有以下配置:

I have another [gii-generated] search model with a following configuration in the search() method:

public function search($params)
{
    $query = User::find();

    // add conditions that should always apply here

    $this->load($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;
    }

    $andFilterWhere = [
        'id' => $this->id,
        'status' => $this->status,
        'role' => $this->role,
        'created_at' => $this->created_at,
        'updated_at' => $this->updated_at,
        'completed_files' => $this->completed_files,
        // 'activated_at' => null,
    ];

    if(!isset($_GET['deleted'])) {
        $query->where(['deleted_at' => null]);
        $andFilterWhere['deleted_at'] = null;
    } else if($_GET['deleted'] === 'true') {
        $query->where(['not', ['deleted_at' => null]]);
    }

    // grid filtering conditions
    $query->andFilterWhere(
        $andFilterWhere
    );

    $query->andFilterWhere(['like', 'first_name', $this->username])
        ->andFilterWhere(['like', 'auth_key', $this->auth_key])
        ->andFilterWhere(['like', 'password_hash', $this->password_hash])
        ->andFilterWhere(['like', 'password_reset_token', $this->password_reset_token])
        ->andFilterWhere(['like', 'email', $this->email])
        ->andFilterWhere(['like', 'first_name', $this->first_name])
        ->andFilterWhere(['like', 'last_name', $this->last_name]);

    if($this->activated || $this->activated === "0") {
        #die(var_dump($this->activated));
        if($this->activated === '1') {
            // this doesn't filter
            $query->andFilterWhere(['not', ['activated_at' => null]]);
        } else if($this->activated === '0') {
            // this doesn't either
            $query->andFilterWhere(['activated_at', null]);
        }
    }

    $dataProvider = new ActiveDataProvider([
        'query' => $query,
    ]);

    return $dataProvider;
}

是的，我已经在我的班级中设置了 activated 属性:

Yes, I have set the activated property in my class:

public $activated;

我的 rules() 方法如下:

public function rules()
{
    return [
        [['id', 'status', 'role', 'created_at', 'updated_at', 'completed_files'], 'integer'],
        ['activated', 'string'],
        [['username', 'first_name', 'last_name', 'auth_key', 'password_hash', 'password_reset_token', 'email', 'deleted_at', 'completed_files', 'activated_at'], 'safe'],
    ];
}

我试图在 search() 方法中设置的是根据 $activated 值过滤字段 activated_at(请参阅以上代码):

What I was trying to set in the search() method is to filter on field activated_at depending on the $activated value (see above code):

if($this->activated || $this->activated === "0") {
    #die(var_dump($this->activated));
    if($this->activated === '1') {
        // this doesn't filter
        $query->andFilterWhere(['not', ['activated_at' => null]]);
    } else if($this->activated === '0') {
        // this doesn't either
        $query->andFilterWhere(['activated_at', null]);
        $andFilterWhere['activated_at'] = null;
    }
}

我将它与 GridView 一起使用 - 除了这个过滤器之外，其他所有过滤器都可以使用.

I use it with GridView - every other filter works except this one.

我在这里做错了什么?

以及如何正确执行此类查询:

Aand how to properly do this sort of queries:

IS NULL something
IS NOT NULL something

使用 Yii 2 的 ActiveRecord 查询构建器?

With Yii 2's ActiveRecord query builder?

行:if(!isset($_GET['deleted'])) 用于其他用途，这正常工作.

Line: if(!isset($_GET['deleted'])) is used for something else and this works normally.

推荐答案

如果我理解正确你可以使用 andWhere

If i understand right you can use andWhere

 ->andWhere(['not', ['activated_at' => null]])

but andFilterWhere in execute where the related value is not null

but andFilterWhere in execute where the related value is not null

来自文档 http://www.yiiframework.com/doc-2.0/yii-db-query.html

andFilterWhere() 将额外的 WHERE 条件添加到存在一个但忽略空操作数.

andFilterWhere() Adds an additional WHERE condition to the existing one but ignores empty operands.

这篇关于如何使用 Yii 2 ActiveRecord 做 IS NULL 和 IS NOT NULL?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！