博客的每篇文章都是需要有标签的，它与文章也是多对多的关系 这篇笔记也是记录了实现标签的步骤逻辑。
在我们之前的笔记中创建了Tag的控制器和路由了 所以这篇笔记不在重复
1 创建模型与迁移文件
迁移文件如下：
public function up()
{
Schema::create('tags', function (Blueprint $table) {
$table->increments('id');
// tag的名字 唯一
$table->string('tag')->unique();
// tag的标题
$table->string('title');
// tag副标题
$table->string('subtitle');
// tag的图片
$table->string('page_image');
// tag的描述
$table->string('meta_description');
// 要使用的布局
$table->string('layout')->default('blog.layouts.index');
// 排序
$table->boolean('reverse_direction');
$table->timestamps();
});
}
2 展示Tag
在TagController的index方法添加如下代码：
public function index()
{
$tags = Tag::all();
return view('admin.tag.index')->withTags($tags);
}
创建 index.blade.php 路径是：views/admin/tag
@extends('admin.layout')
@section('content')
<div class="container-fluid">
<div class="row page-title-row">
<div class="col-md-6">
<h3>Tags <small>» Listing</small></h3>
</div>
<div class="col-md-6 text-right">
<a href="/admin/tag/create" class="btn btn-success btn-md">
<i class="fa fa-plus-circle"></i> New Tag
</a>
</div>
</div>
<div class="row">
<div class="col-sm-12">
@include('admin.partials.error')
@include('admin.partials.success')
<table id="tags-table" class="table table-striped table-bordered">
<thead>
<tr>
<th>Tag</th>
<th>Title</th>
<th class="hidden-sm">Subtitle</th>
<th class="hidden-md">Page Image</th>
<th class="hidden-md">Meta Description</th>
<th class="hidden-md">Layout</th>
<th class="hidden-sm">Direction</th>
<th data-sortable="false">Actions</th>
</tr>
</thead>
<tbody>
@foreach ($tags as $tag)
<tr>
<td>{{ $tag->tag }}</td>
<td>{{ $tag->title }}</td>
<td class="hidden-sm">{{ $tag->subtitle }}</td>
<td class="hidden-md">{{ $tag->page_image }}</td>
<td class="hidden-md">{{ $tag->meta_description }}</td>
<td class="hidden-md">{{ $tag->layout }}</td>
<td class="hidden-sm">
@if ($tag->reverse_direction)
Reverse
@else
Normal
@endif
</td>
<td>
<a href="/admin/tag/{{ $tag->id }}/edit" class="btn btn-xs btn-info">
<i class="fa fa-edit"></i> Edit
</a>
</td>
</tr>
@endforeach
</tbody>
</table>
</div>
</div>
</div>
@stop
@section('scripts')
<script>
$(function() {
$("#tags-table").DataTable({
});
});
</script>
@stop
注意：在上面的代码片段中我们运用了fontawesome和DataTable 可以自行用Bower和Gulp集成一下
3 创建Tag
在我们进入到创建视图是需要自动填入一些默认值，可以这么做：在TagController里添加一个属性fields数组：
protected $fields = [
'tag' => '',
'title' => '',
'subtitle' => '',
'meta_description' => '',
'page_image' => '',
'layout' => 'blog.layouts.index',
'reverse_direction' => 0,
];
然后在create方法中运用：
public function create()
{
$data = [];
foreach ($this->fields as $field => $default) {
// 这里使用old方法是因为如果验证规则没有通过的话 将之前填入的值返回给页面
// 这样就避免了一个问题:某个字段没有通过规则要求 重定向回创建页面时之前填入的数据不会消失。
$data[$field] = old($field, $default);
}
return view('admin.tag.create', $data);
}
创建 create.blade.php 路径是：views/admin/tag
@extends('admin.layout')
@section('content')
<div class="container-fluid">
<div class="row page-title-row">
<div class="col-md-12">
<h3>Tags <small>Create New Tag</small></h3>
</div>
</div>
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">New Tag From</h3>
</div>
<div class="panel-body">
@include('admin.partials.error')
<form action="/admin/tag" method="post" role="form" class="form-horizontal">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
<div class="form-group">
<label for="tag" class="col-md-3 control-label">Tag</label>
<div class="col-md-3">
<input type="text" class="form-control" name="tag" id="tag" value="{{ $tag }}" autofocus>
</div>
</div>
@include('admin.tag._form')
<div class="form-group">
<div class="col-md-7 col-md-offset-3">
<button class="btn btn-primary btn-md" type="submit">
<i class="fa fa-plus-circle"></i>
Add New Tag
</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
@endsection
上面的代码片段中include一个_form.blade.php 是因为有一段HTML是可以重复利用的
接下来就创建_form.blade.php：
<div class="form-group">
<label for="title" class="col-md-3 control-label">
Title
</label>
<div class="col-md-8">
<input type="text" class="form-control" name="title" id="title" value="{{ $title }}">
</div>
</div> <div class="form-group">
<label for="subtitle" class="col-md-3 control-label">
Subtitle
</label>
<div class="col-md-8">
<input type="text" class="form-control" name="subtitle" id="subtitle" value="{{ $subtitle }}">
</div>
</div> <div class="form-group">
<label for="meta_description" class="col-md-3 control-label">
Meta Description
</label>
<div class="col-md-8">
<textarea class="form-control" id="meta_description" name="meta_description" rows="3">{{ $meta_description }}</textarea>
</div>
</div> <div class="form-group">
<label for="page_image" class="col-md-3 control-label">
Page Image
</label>
<div class="col-md-8">
<input type="text" class="form-control" name="page_image" id="page_image" value="{{ $page_image }}">
</div>
</div> <div class="form-group">
<label for="layout" class="col-md-3 control-label">
Layout
</label>
<div class="col-md-4">
<input type="text" class="form-control" name="layout" id="layout" value="{{ $layout }}">
</div>
</div> <div class="form-group">
<label for="reverse_direction" class="col-md-3 control-label">
Direction
</label>
<div class="col-md-7">
<label class="radio-inline">
<input type="radio" name="reverse_direction" id="reverse_direction"
@if (! $reverse_direction)
checked="checked"
@endif
value="0">
Normal
</label>
<label class="radio-inline">
<input type="radio" name="reverse_direction"
@if ($reverse_direction)
checked="checked"
@endif
value="1">
Reversed
</label>
</div>
</div>
创建一个Request：
class TagCreateRequest extends Request
{
/**
* Determine if the user is authorized to make this request.
*
* @return bool
*/
public function authorize()
{
return true;
} /**
* Get the validation rules that apply to the request.
*
* @return array
*/
public function rules()
{
// 我们可以直接在rules中做一些验证处理 这根Validate效果是一样的
return [
'tag' => 'required|unique:tags,tag',
'title' => 'required',
'subtitle' => 'required',
'layout' => 'required',
];
}
}
实现store方法：
public function store(Requests\TagCreateRequest $request)
{
$tag = new Tag();
foreach (array_keys($this->fields) as $field) {
$tag->$field = $request->get($field);
}
$tag->save(); return redirect('/admin/tag')->withSuccess('The tag "$tag->tag" was created');
}
4 修改Tag
在TagController中添加如下代码：
public function edit($id)
{
$tag = Tag::findOrFail($id);
$data = ['id' => $id];
foreach (array_keys($this->fields) as $key) {
$data[$key] = old($key, $tag->$key);
}
return view('admin.tag.edit', $data);
}
创建edit视图：
@extends('admin.layout')
@section('content')
<div class="container-fluid">
<div class="row page-title-row">
<div class="col-md-12">
<h3>Tags <small>Edit Tag</small></h3>
</div>
</div>
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">Tag Edit Form</h3>
</div>
<div class="panel-body">
@include('admin.partials.error')
@include('admin.partials.success')
<form action="/admin/tag/{{ $id }}" class="form-horizontal" role="form" method="post">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
<input type="hidden" name="id" value="{{ $id }}">
<input type="hidden" name="_method" value="put">
<div class="form-group">
<label for="tag" class="col-md-3 control-label">Tag</label>
<div class="col-md-3">
<p class="form-control-static">{{ $tag }}</p>
</div>
</div>
@include('admin.tag._form')
<div class="form-group">
<div class="col-md-7 col-md-offset-3">
<button class="btn btn-primary btn-md" type="submit">
<i class="fa fa-save"></i>
Save Changes
</button>
<button class="btn btn-danger btn-md" type="button" data-toggle="modal" data-target="#modal-delete">
<i class="fa fa-times-circle"></i>
Delete
</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
<div class="modal fade" id="modal-delete" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button class="close" type="button" data-dismiss="modal">x</button>
<h4 class="modal-title">Please Confirm</h4>
</div>
<div class="modal-body">
<p class="lead">
<i class="fa fa-question-circle"></i>
Are you sure you want to delete this tag?
</p>
</div>
<div class="modal-footer">
<form action="/admin/tag/{{ $id }}" method="post">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
<input type="hidden" name="_method" value="delete">
<button class="btn btn-default" data-dismiss="modal" type="button">Cancl</button>
<button class="btn btn-danger" type="submit">
<i class="fa fa-times-circle"></i>
Yes
</button>
</form>
</div>
</div>
</div>
</div>
@endsection
同样的 我们需要创建一个TagUpdateRequest：
class TagUpdateRequest extends Request
{
/**
* Determine if the user is authorized to make this request.
*
* @return bool
*/
public function authorize()
{
return true;
} /**
* Get the validation rules that apply to the request.
*
* @return array
*/
public function rules()
{
return [
'title' => 'required',
'subtitle' => 'required',
'layout' => 'required',
];
}
}
然后在update方法中添加如下代码：
public function update(Request $request, $id)
{
$tag = Tag::findOrFail($id);
foreach (array_keys(array_except($this->fields, ['tag'])) as $field) {
$tag->$field = $request->get($field);
}
$tag->save();
return redirect("/admin/tag/$id/edit")->withSuccess('Changes saved.');
}
5 删除Tag
我们在edit视图中添加了删除的表单 现在只需要实现以下TagController中的destroy方法就可以了：
public function destroy($id)
{
$tag = Tag::findOrFail($id);
$tag->delete(); return redirect('/admin/tag')->withSuccess("The '$tag->tag' tag has been deleted.");
}
6 其他
我们不需要实现show方法，因此我们需要把路由改成这样：
Route::resource('tag', 'TagController', ['except' => 'show']);
然后删除TagController中的show方法就行了。