一,主表book
class Book extends Model
{
//
protected $fillable=['title','price','num'];
public function bookCard(){
return $this->hasOne(BookCard::class);
}
}
二,关联表bookcard
class BookCard extends Model
{
//
protected $fillable=['number'];
public function book(){
return $this->belongsTo(Book::class);
}
}
三,主表和关联表如何写
$booklist=Book::find(1);
$res=$booklist->bookCard()->create([
'number'=>str_random(16),
]);