我正在做一个Laravel项目，我试图在两个模型之间建立一个一对多的关系
如何使用eloquent创建新用户并将多个帖子与该用户相关联？
如何检索属于特定用户的所有帖子？
下面是我的"User"和"Post"模型的代码:
// User.php
class User extends Model
{
public function posts()
{
return $this->hasMany(Post::class);
}
}
// Post.php
class Post extends Model
{
public function user()
{
return $this->belongsTo(User::class);
}
}
首先，创建一张可容纳post人的桌子.它应该是这样的.
In migration file个
Schema::create('posts', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('user_id');
$table->string('title');
$table->text('body');
$table->timestamps();
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
});
创建用户和帖子.(如果不存在)
$user = User::create(['name' => 'John Doe', 'email' => 'john@example.com', 'password' => Hash::make('password')]);
$post1 = new Post(['title' => 'First', 'body' => 'Content 1']);
$post2 = new Post(['title' => 'Second', 'body' => 'Content 2']);
$user->posts()->saveMany([$post1, $post2]);
In controller个
$user = User::find($userId); // created user ID
$posts = $user->posts;
Or
$user = User::with('posts')->find($userId); # recommended. Cz it uses a single query
您可以使用Laravel factories或Laravel Tinker来创建虚拟数据