laravel formのvalidation

public function store(Request $request){
    	$this->validate($request, [
    		'title' => 'required|min:3',
    		'body' => 'required',
    	]);
    	$post = new Post();
    	$post->title = $request->title;
    	$post->body = $request->body;
    	$post->save();
    	return redirect('/');
    }
}

@section('container')
<h1>
	<a href="{{ url('/') }}" class="header-menu">Back</a>
	New Post</h1>
<form method="post" action="{{ url('/posts') }}">
	{{ csrf_field() }}
	<p>
		<input type="text" name="title" placeholder="enter title" value="{{ old('title') }}">
		@if ($errors->has('title'))
		<span class="error">{{ $errors->first('title')}}</span>
		@endif
	</p>
	<p>
		<textarea name="body" placeholder="enter body">{{ old('body')} }</textarea>
		@if ($errors->has('body'))
		<span class="error">{{ $errors->first('body')}}</span>
		@endif
	</p>
	<p>
		<input type="submit" value="Add">
	</p>
</form>
@endsection

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