php 如何在 Laravel 模型上设置属性的默认值

How to set the default value of an attribute on a Laravel model

提问by Zeeshan Bin Iqbal

How to set the default value of an attribute on a Laravel model?

如何在 Laravel 模型上设置属性的默认值？

Should I set the default when creating a migration or should I set it in the model class?

我应该在创建迁移时设置默认值还是应该在模型类中设置它？

回答by Manish

You can set Default attribute in Model also>

您也可以在模型中设置默认属性>

protected $attributes = [
        'status' => self::STATUS_UNCONFIRMED,
        'role_id' => self::ROLE_PUBLISHER,
    ];

You can find the details in these links

您可以在这些链接中找到详细信息

1.) How to set a default attribute value for a Laravel / Eloquent model?

1.)如何为 Laravel / Eloquent 模型设置默认属性值？

2.) https://laracasts.com/index.php/discuss/channels/eloquent/eloquent-help-generating-attribute-values-before-creating-record

2.) https://laracasts.com/index.php/discuss/channels/eloquent/eloquent-help-generating-attribute-values-before-creating-record

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You can also Use Accessors & Mutatorsfor this You can find the details in the Laravel documentation 1.) https://laravel.com/docs/4.2/eloquent#accessors-and-mutators

您也可以为此使用访问器和修改器您可以在 Laravel 文档中找到详细信息 1.) https://laravel.com/docs/4.2/eloquent#accessors-and-mutators

2.) https://scotch.io/tutorials/automatically-format-laravel-database-fields-with-accessors-and-mutators

2.) https://scotch.io/tutorials/automatically-format-laravel-database-fields-with-accessors-and-mutators

3.) Universal accessors and mutators in Laravel 4

3.) Laravel 4 中的通用访问器和修改器

回答by parker_codes

The other answers are not working for me - they may be outdated. This is what I used as my solution for auto setting an attribute:

其他答案对我不起作用 - 它们可能已经过时。这就是我用来自动设置属性的解决方案：

/**
 * The "booting" method of the model.
 *
 * @return void
 */
protected static function boot()
{
    parent::boot();

    // auto-sets values on creation
    static::creating(function ($query) {
        $query->is_voicemail = $query->is_voicemail ?? true;
    });
}

回答by Alexey Mezenin

You should set default values in migrations:

您应该在迁移中设置默认值：

$table->tinyInteger('role')->default(1);