如何检查模型的任何字段是空还是空？

Question

I have a model, $userModel . I want to check if any of the fields for this model are empty or null .

At the moment I am doing it with a big if statement.

if(!empty($userModel->name) && !empty($userModel->address) ... && !empty($userModel->email))
{
   // All fields have values
}

This way works, but if later I need to add another field to the model, then I need to go back to the if and add another && condition there.

How can I do this in one check?

Is there something like: $userModel::model()->areAllFieldsFilled();

---

Extra info: The model is already saved in the db, and there is no need for user input. This is just me checking how complete a particular model is, by no means will all these fields be required in the database, only a few. Things like $userModel->bio are usually left null .

I want to avoid checking 5 to 10 fields. I don't want a giant if that has to be maintained when the model changes.

Answer 1

PHP allows you to iterate over an object's properties . The check for each property could be simplified using empty() :

$allHaveValues = TRUE;
foreach ($userModel as $key => $value) {
    if (empty($value)) {
       $allHaveValues = FALSE;
       break;
    }
}

if ($allHaveValues) {
    // Do something...
}

Answer 2

Use empty()

if(!empty($userModel->name)) { .. }

empty() DOCS

• "" (an empty string)
• 0 (0 as an integer)
• 0.0 (0 as a float)
• "0" (0 as a string)
• NULL
• FALSE
• array() (an empty array)
• $var; (a variable declared, but without a value)

Update

$modelData = array($userModel->name, $userModel->address, $userModel->email);
if(!in_array('', $modelData) && !in_array(null, $modelData)) { .. }

in_array()

Or you can use array_intersect -

if(empty(array_intersect(array('', null), $modelData))) { .. }

array_intersect()

Answer 3

I think you don't need do it.
Everything you need - it just specify your validation rules.
For example:

<?php

class Brand extends CActiveRecord
{
    public function tableName()
    {
        return 'brand';
    }

    public function rules()
    {
        return [
            ['name, country', 'on' => 'insert'],
            ['name', 'type', 'type' => 'string', 'on' => 'insert'],
            ['name', 'length', 'max' => 100, 'on' => 'insert'],
            ['name', 'type', 'type' => 'array', 'on' => 'search'],
            ['country', 'type', 'type' => 'string'],
            ['country', 'length', 'max' => 50],
        ];
    }
}

When you will use this model you'll just need validate this model by $model->validate() and if it fails - show errors with $model->getErrors() . Moreover you can specify what rules scenario you wish to use. For example: $model->senario = 'search'; will be used validation rule search and property name should be array. But when scenario insert name should be string with length not more than 100.

In my example fields: name, country - required for insert ( ['name, country', 'on' => 'insert'] ).