我正在尝试编写一些代码，用于显示 Laravel 数据库中的数据。但是我有两个用外键相互链接的表值，当我尝试在我的页面上显示它时，它只显示 id 而不是实际名称。我在另一个 stackoverflow 问题中看到您应该在您的模型中定义表数据值，但这不起作用或者我做错了。有人可以帮我解决这个问题吗？:)
模型Planet.php：
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Planet extends Model
{
public function solar()
{
return $this->belongsTo(SolarSystems::class, 'id');
}
}
SolarSystems.php 模型：
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class SolarSystems extends Model
{
public function planet()
{
return $this->belongsTo(Planet::class, 'solar_systems_id');
}
}
行星控制器.php：
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\Planet;
use App\Models\SolarSystems;
class PlanetController extends Controller
{
public function index()
{
$planets = Planet::all();
$solar = SolarSystems::all();
return view('welcome', ['planets'=>$planets]);
}
public function show($planeet)
{
$planets = Planet::all();
$solar = SolarSystems::all();
$planets = collect($planets)->where('name', $planeet);
return view('welcome', ['planets' => $planets]);
}
}
欢迎.blade.php：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Laravel</title>
<link href="https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&display=swap" rel="stylesheet">
<style>
body {
font-family: 'Nunito', sans-serif;
}
</style>
</head>
<body>
@foreach ($planets as $planeten)
<ul>
<li>{{ ucfirst($planeten->name) }}</li>
<p>{{ ucfirst($planeten->description) }}</p>
<p>{{ ucfirst($planeten->solar_systems_id) }}
</ul>
@endforeach
</body>
</html>
导入.sql：
CREATE DATABASE laravel;
USE laravel;
CREATE TABLE planets (
id int(11) AUTO_INCREMENT,
name text,
description text,
size_in_km int(11),
solar_systems_id int(11),
PRIMARY KEY (id)
);
CREATE TABLE solar_systems (
id int(11) AUTO_INCREMENT,
name text,
age_in_years int(11),
PRIMARY KEY (id)
);
INSERT INTO planets (name, description, size_in_km, solar_systems_id)
VALUES ('mars', 'Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, being larger than only Mercury.', 3389, 1);
INSERT INTO planets (name, description, size_in_km, solar_systems_id)
VALUES ('venus', 'Venus is the second planet from the Sun. It is named after the Roman goddess of love and beauty.', 6051, 1);
INSERT INTO planets (name, description, size_in_km, solar_systems_id)
VALUES ('earth', 'Our home planet is the third planet from the Sun, and the only place we know of so far thats inhabited by living things.', 6371, 1);
INSERT INTO solar_systems (name, age_in_years)
VALUES ('The Milky Way', 1360000000);
这就是我现在得到的，但不是“1”而是需要说：“银河系”
