如何在Laravel 5.4中实现搜索功能

我是Laravel的新手，对如何实现应用程序的搜索功能有一些理解上的问题.

I'm new to Laravel and have some understanding problems how can I implement a search function to my app.

到目前为止我尝试过的.

What I have tried so far.

我创建了一个从数据库获取数据的模型(正在运行)

I created a model that gets the data from the db (this is working)

class Post extends Model
{
    public static function scopeSearch($query, $searchTerm)
    {
        return $query->where('city', 'like', '%' .$searchTerm. '%')
                     ->orWhere('name', 'like', '%' .$searchTerm. '%');
    }
}

我的控制器如下:

use App\Post;

    class PostsController extends Controller
    {
        public function index(Request $request) 
        {
            $searchTerm = $request->input('searchTerm');
            $posts = Post::all()
            ->search($searchTerm);
            return view('posts.index', compact('posts', 'searchTerm'));
        }

       public function show($id)
       {
           $post = Post::find($id);
           return view('posts.show', compact('post'));
       }
    }

使用php artisan tinker，模型正在运行.我正在获取数据库查询.

With php artisan tinker the model is working. I'm getting the db query.

在前端，我有一个带有提交按钮的简单输入字段:

On the front-end I have a simple input field with a submit button:

<div class="container">
    <div class="col-sm-8">
        <form action="posts.index" method="GET">
            {{csrf_field()}}
            <div class="input-group">
                <input type="text" class="form-control" name="searchTerm" placeholder="Search for..." value="{{ isset($searchTerm) ? $searchTerm : '' }}">
                <span class="input-group-btn">
                    <button class="btn btn-secondary" type="submit">Search</button>
                </span>
            </div>
        </form>
    </div>
</div>

但是，现在，如果我在搜索输入字段中输入内容，如何从控制器中检索数据?该代码仅在我收到所有帖子时才有效.我需要以某种方式包括控制器中的 serachTerm

But, now, how can I retrieve the data from the controller if I input something in the search input field? The code is only working when I get all the posts. I need to include somehow the serachTerm from the controller

@extends('layouts.master')

@section('content')
<div class="col-sm-8 blog-main">
    @foreach($posts as $post)
        <div class="card" style="margin-bottom: 10px">
            <div class="card-block">
                <h3 class="card-title">{{ $post->Name1 }}</h3>
                <small>Created at: {{ $post->created_at->toFormattedDateString() }}</small>
                <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
                <a href="{{$post->id}}" class="btn btn-primary">Details</a>
            </div>
        </div>
    @endforeach

</div>
@endsection