Laravel - 集合表

Question

有两张桌子，一张是街道，另一张是房子的信息。 我尝试使用 house 表中的 street_id 列加入这些表。该表有效，我得到了信息。但是现在我怎样才能做到这一点，以便当我点击街道/{ID} 链接时，我会得到一个位于上面的房屋列表。 据我了解，需要添加代码

public function getHouse() 
{
$houses = Houses::where('street_id', $this->street_id)->get();
dd ($houses);
}

DD 等一下。我哪里做错了？

Answer 1

您可以在下面这样做。

街道模型：-

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Street extends Model
{
    public function houses()
    {
        return $this->hasMany('App\Models\House');
    }
}

房屋模型：-

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class House extends Model
{
    public function street()
    {
        return $this->BelongsTo('App\Models\Street','street_id');
    }
}

HouseController:-

<?php

namespace App\Http\Controllers;

use App\Models\Street;
use App\Models\House;
 
class HouseController extends Controller
{
    public function getHouse($street_id) 
    {
       //include model

        dump($street_id); // first you can get street_id

        // You can use with()
        $houses = House::with('street')->where('street_id',$street_id)->get();

        or 

         // also you can use whereHas()
        $houses = House::whereHas('street', function($q) use($street_id){
            $q->where('id',$street_id);
        })->get();

        or

        $houses = Street::with('houses')->where('id',$street_id)->get();
        
    }
}

希望对您有所帮助。

Answer 2

你可以通过 laravel 的 Eloquent relationships 来实现。您需要像这样在 Street Model 文件中声明关系...

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Street extends Model
{
    /**
     * Get the houses on the street.
     */
    public function houses()
    {
        return $this->hasMany(House::class);
    }
}

现在您可以在控制器中返回街道上房屋的视图；

$houses = Street::find(1)->houses();

<?php

namespace App\Http\Controllers;

use App\Models\Street;
use Illuminate\Http\Request;

class StreetsController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $street = Street::all();
        return view('street.all', compact('street'));
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param \Illuminate\Http\Request $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        //
    }

    /**
     * Display the specified resource.
     *
     * @param \App\Models\Appartaments $appartaments
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        $street = Street::find(1)->houses();
//        $house = $street->houses;
        dd($street);
        return view('street.view', compact('street'));
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param \App\Models\Appartaments $appartaments
     * @return \Illuminate\Http\Response
     */
    public function edit(Appartaments $appartaments)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param \Illuminate\Http\Request $request
     * @param \App\Models\Appartaments $appartaments
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, Appartaments $appartaments)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param \App\Models\Appartaments $appartaments
     * @return \Illuminate\Http\Response
     */
    public function destroy(Appartaments $appartaments)
    {
        //
    }
}