在Phinx Migrations(CakePhp3)中错误地形成了外键约束

时间:2016-02-02 11:32:48

标签: php cakephp migration cakephp-3.0 phinx

我有这两个迁移文件,我想在" samples"中添加" clients" 的主键作为外键。 但是在迁移时,它会给我一个错误,"外键约束形成错误"。

以下是命令行的屏幕截图:

Error Screenshot

这是我的代码:

CreateClients

<?php
use Migrations\AbstractMigration;

class CreateClients extends AbstractMigration
{
    public function change()
    {
        $table = $this->table('clients');

        $table->addColumn('name', 'string', [
            'limit' => 100,
            'null' => false,
        ]);
        $table->addColumn('title', 'string', [
            'default' => null,
            'limit' => 100,
            'null' => true,
        ]);
        $table->addColumn('street', 'string', [
            'limit' => 255,
            'null' => false,
        ]);
        $table->addColumn('city', 'string', [
            'limit' => 255,
            'null' => false,
        ]);
        $table->addColumn('state', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => false,
        ]);
        $table->addColumn('zipcode', 'biginteger', [
            'limit' => 10,
            'null' => false,
        ]);
        $table->addColumn('country', 'string', [
            'limit' => 255,
            'null' => false,
        ]);
        $table->addColumn('phone', 'biginteger', [
            'limit' => 10,
            'null' => false,
        ]);
        $table->addColumn('emailprimary', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('emailsecondary', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('username', 'string', [
            'limit' => 255,
            'null' => false,

        ])->addIndex(array('username'), array('unique' => true));
        $table->addColumn('password', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => false,
        ]);
        $table->addColumn('billing_title', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('billing_street', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('billing_city', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('billing_state', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('billing_zipcode', 'biginteger', [
            'default' => null,
            'limit' => 20,
            'null' => true,
        ]);
        $table->addColumn('billing_country', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->addColumn('billing_phone', 'string', [
            'default' => null,
            'limit' => 255,
            'null' => true,
        ]);
        $table->create();
    }
}

CreateSamples

<?php
use Migrations\AbstractMigration;

class CreateSamples extends AbstractMigration
{
    /**
     * Change Method.
     *
     * More information on this method is available here:
     * http://docs.phinx.org/en/latest/migrations.html#the-change-method
     * @return void
     */
    public function change()
    {
        $table = $this->table('samples');

        $table->addColumn('name', 'string', [
            'limit' => '100',
            'null' => false,
        ]);
        $table->addColumn('client_id', 'integer', [
            'null' => false,
        ]);
        $table->addForeignKey('client_id', 'clients', 'id', array('delete'=> 'SET_NULL', 'update'=> 'NO_ACTION'));
        $table->save();

        $table->create();
    }
}

1 个答案:

答案 0 :(得分:1)

在CreateSamples迁移中,您将client_id列定义为非null。但是,在定义外键时,可以将其设置为on delete, set null。那不能一起去。取决于您的应用程序的逻辑,而不是SET_NULLCASCADERESTRICT将是更好的选择。 (限制会阻止您删除带有示例的客户。)您还可以将client_id列定义为'null' => 'true'。 所以,例如,试试这个:

$table->addForeignKey('client_id', 'clients', 'id', array('delete'=> 'CASCADE', 'update'=> 'NO_ACTION'));

删除客户端时会删除样本。

关于MySQL行为here的更多解释。