Yii2：基于两种型号的日期自定义验证

I am having two models namely Patient Admission having two columns such as admission_date and discharge_date and another model daily_ward_entry having a date field say just date both models are related by ipd_patient_id

Now What I want is to create one or two validators, so that I can restrict the date entry in daily_ward_entry between admission_date and discharge_date

I had a look at the compare validator, but I can't make out, how to replace the value to be compared with attribute from another model with relation.

I have tried following variations, but it always throwing error:

Variation one

[$this->discharge_date, 'compare', 'compareValue' => $this->admission_date, 
'operator' => '>='],

error - Unknown Property – yii\base\UnknownPropertyException

Variation two

['discharge_date', 'compare', 'compareValue' => 'admission_date', 'operator' => '>='],

error - Discharge Date must be greater than or equal to "admission_date". This error is generated irrespective of date is lower or greater

variation three

[strtotime($this->discharge_date), 'compare', 'compareValue' =>
strtotime($this->admission_date), 'operator' => '>='],

error - Unknown Property – yii\base\UnknownPropertyException

I need some direction and help. Thanks.

You should be able to achieve your validation rule using a custom validator:

public function rules()
{
    return [
        ['daily_ward_entry', 'validateDate'],
    ]
}

public function validateDate($attribute, $params) {
    if(!($this->patientAdmission->admission_date <= $this->$attribute && $this->$attribute <= $this->patientAdmission->discharge_date)) {
        $this->addError($attribute, 'The Daily Ward Entry must be between the admission date and the discharge date.');
    }
}

Something like this should conceivably work, I am not entirely sure how your relations are set up so you'll likely have to modify that a little.

In this case you have to perform custom validation. in Custom function you will get all model data in POST, so you can get data and perform validation.