Laravel：一对一关系变成一对多关系

问题描述

当我创建一对一的关系迁移时，laravel创建一对多的关系。

When I create a one-to-one relationship migration, laravel creates a one-to-many relationship.

PHP 7.1& MySQL 5.7

PHP 7.1 & MySQL 5.7

模型是：Persona&用户。

The models are: Persona & User.

角色：

public function user()
{
    return $this->hasOne('App\User', 'persona_id', 'id');
}

用户：

public function persona()
{
    return $this->belongsTo('App\Persona', 'persona_id', 'id');
}

迁移：

Schema::create('users', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('persona_id')->unsigned();
    $table->foreign('persona_id')->references('id')->on('personas')->onDelete('cascade');
    $table->unique(['persona_id', 'id']);
    $table->string('email')->nullable()->unique();
    $table->string('password')->nullable();
    $table->rememberToken();
    $table->timestamps();
});


Schema::create('personas', function (Blueprint $table) {
    $table->increments('id');
    $table->string('tipo');
    $table->integer('cedula')->unsigned()->unique();
    $table->string('primer_nombre');
    $table->string('segundo_nombre')->nullable();
    $table->string('primer_apellido');
    $table->string('segundo_apellido')->nullable();
    /* Agregar demas campos que se requieran */
    $table->timestamps();
});

如何使在数据库中创建的关系一对一而不是一对多？
当前，这使我每人可以节省多个用户。

How can I make the relationship created in the database one by one and not one to many?Currently this is allowing me to save more than one user per person.

谢谢。

推荐答案

仅在 persona_id 上放置唯一索引：

$table->unique('persona_id');

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