Question

我的Laravel 5应用程序出了问题。我的controller-method包含一个foreach，它应该迭代先前的Eloquent-result-array（名为$ zipcodes）。因此，每个zipcode用于填充查询，该结果返回一个Article-object（名为$ article）。迭代的每一端都应该将Article-result添加到一个数组（$ articles）中，该数组在我的方法结束时用于在我的页面上显示文章。也许有更好的选择来执行文章查询，而不是每次迭代，但我不知道如何。

更新

这适用于我的问题，而不是在foreach中执行查询：Laravel multiple where clauses in query from given array

我的代码现在是

// grabs all zipcodes matching the distance
$zipcodes = $this->getZipcodes($zipCoordinateId, $distance);

foreach ($zipcodes AS $key=>$val)
{
    $zipcodes[$key] = (array) $val;
}

$codes = array_column($zipcodes, 'zc_zip');

$articles = Article::whereIn('zipcode', $codes)->get();

return view('pages.intern.articles.index', compact('articles'));

更新结束

我的SearchController：

<?php

namespace App\Http\Controllers;

use App\Article;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Session;

class SearchController extends Controller
{
public function getSearch(Request $request)
{
    if(($request->has('zipcode'))) {
        $zipcode = $request->input('zipcode');
        $distance = $request->input('distance');

        $zipCoordinateId = $this->getZipCoordindateId($zipcode);
        $zipcodes = $this->getZipcodes($zipCoordinateId, $distance);

        $articles = array();

        foreach($zipcodes as $value) {
            //$zipcode = $zipcodes[0]->zc_zip; // this is working
            $zipcode = $value->zc_zip;

            $article = Article::where('zipcode', $zipcode)->get();


           // add the $article each iteration to $articles
        }

        return view('pages.articles', compact('articles'));
    } else {
        return redirect('/articles');
    }
}

public function getZipCoordindateId($value) {
    $result = DB::table('zip_coordinates')
            ->where('zc_zip', '=' , $value)
            ->orWhere('zc_location_name', 'LIKE', $value)
            ->pluck('zc_id');
    return $result;
}

public function getZipcodes($id, $distance) {

    $result = DB::select(
        DB::raw("
            SELECT dest.zc_zip,
                ACOS(
                    SIN(RADIANS(src.zc_lat)) * SIN(RADIANS(dest.zc_lat))
                    + COS(RADIANS(src.zc_lat)) * COS(RADIANS(dest.zc_lat))
                    * COS(RADIANS(src.zc_lon) - RADIANS(dest.zc_lon))
                ) * 6380 AS distance
            FROM zip_coordinates AS dest
            CROSS JOIN zip_coordinates AS src
            WHERE src.zc_id = :id
            HAVING distance < :distance
            ORDER BY distance"), array('id' => $id, 'distance' => $distance));

    return $result;
}
}

我的观点：

@extends('layouts.default')

@section('content')
    <h1>All Articles</h1>
<hr/>

<search>
    {!! Form::open(['url' => 'intern/search']) !!}
        {!! Form::text('zipcode', null, ['class' => 'form-control']) !!}
        {!! Form::select('distance', [
          '5' => '5 km',
          '10' => '10 km',
          '25' => '25 km',
          '50' => '50 km',
          ], null, ['class' => 'form-control']) !!}
        {!! Form::submit('Suchen', ['class' => 'btn btn-success']) !!}
    {!! Form::close() !!}
</search>


@foreach($articles as $article)
    <article>
        <h2>
            <a href="{{ url('/articles', $article->id) }}">{{ $article->name }}</a>
        </h2>

        <div>
            <label>Description:</label>
            <p>{{ $article->description }}</p>
        </div>
        <div>
            <label>ZIPCODE:</label>
            {{ $article->zipcode }}
        </div>
        <div>
            <label>Published:</label>
            {{ $article->published }}
        </div>
        <div>
            <label>Rank:</label>
            {{ $article->rank }}
        </div>
    </article>
    <hr/>
@endforeach
@stop

希望你能帮助我，提前谢谢你。 quantatheist

修改

当我使用

时

foreach($zipcodes as $key => $value)
        {
            $articles[] = Article::where('zipcode', $value->zc_zip)->get();
        }
        print_r($articles);

在我的文章的搜索和更新的邮政编码中有另一个邮政编码，它打印出来（目前，我的数据库中有三篇文章，两者都有拉链码，这些都在我的新邮政编码搜索范围内）：

编辑2

我print_r来自$ articles = Article :: all（）;的文章，它使用相同的返回视图（＆＃39; pages.articles＆＃39;，compact（＆＃39; articles＆＃39;））;并显示在同一网站上：

因此我的print_r（$ articles）的输出应该是这样的。

编辑3

我目前的预告是：

foreach($zipcodes as $key => $value)
        {
            //$code = $zipcodes[0]->zc_zip; // working, prints out one article
            //$article = Article::where('zipcode', $code)->get();
            $article = Article::where('zipcode', $value->zc_zip)->get();
            //print_r($article);
        }
        print_r($article);

Answer 1

你可以试试这个：

foreach($zipcodes as $key => $value)
{
    $articles[] = Article::where('zipcode', $value->zc_zip)->get();
}
return view('pages.articles', compact('articles'));

查看：

@foreach($articles as $article)
<article>
    <h2>
        <a href="{!! url('/articles', $article->id) !!}">{!! $article->name !!}</a>
    </h2>

    <div>
        <label>Description:</label>
        <p>{!! $article->description !!}</p>
    </div>
    <div>
        <label>ZIPCODE:</label>
        {!! $article->zipcode !!}
    </div>
    <div>
        <label>Published:</label>
        {!! $article->published !!}
    </div>
    <div>
        <label>Rank:</label>
        {!! $article->rank !!}
    </div>
</article>
<hr/>
@endforeach

Answer 2

您已声明$ articles = array（）;然后你将$ article（没有 s ）传递给紧凑函数，这就是为什么你在视图中得到一个未定义的变量，同样当你在foreach中循环时你必须像这样做：

@foreach($articles as $article)
....
@endforeach

Laravel 5将foreach中的查询结果添加到数组

2 个答案: