How to do IS NULL and IS NOT NULL with Yii 2 ActiveRecord?

Question

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

Answer 1

for this expression:

WHERE activated_at IS NULL

try this (it's working):

->andWhere(['is', 'activated_at', new \yii\db\Expression('null')]),

Answer 2

this solution check if column_name is empty or NULL

WHERE (LENGTH(`column_name`) > 0)

->andWhere(['>', 'LENGTH(column_name)', 0]) //check if empty or null

---

Another variant - check only for NULL

WHERE column_name IS NOT NULL

->andWhere(['IS NOT', 'column_name', null]); // check on null

Answer 3

$null = new Expression('NULL');

$query->andFilterWhere(['is not', 'asp_id', $null]);

OR

$query->andFilterWhere(['is', 'asp_id', $null]);

Answer 4

If i understand right you can use andWhere

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

but andFilterWhere in execute where the related value is not null

from doc http://www.yiiframework.com/doc-2.0/yii-db-query.html

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

Answer 5

// ...WHERE (`status` = 10) AND (`type` IS NULL) AND (`info` IS NOT NULL)
$query->where([
    'status' => 10,
    'type' => null,
])
->andWhere(['not', ['info' => null]]);