Php 如何为帖子创建类别标签?我使用的是laravel 8
我试图允许用户在表单中创建帖子时创建并向帖子添加类别标签 我还希望这些标签出现在纵断面图中,并作为过滤器按钮,根据它们拥有的标签名称显示帖子 然而,在我尝试实现这一总体结果时,我陷入了困境,因为每次我提交带有标签的帖子时,标签数组总是在视图中显示为空 我的邮箱是:Php 如何为帖子创建类别标签?我使用的是laravel 8,php,laravel,model-view-controller,laravel-8,eloquent-relationship,Php,Laravel,Model View Controller,Laravel 8,Eloquent Relationship,我试图允许用户在表单中创建帖子时创建并向帖子添加类别标签 我还希望这些标签出现在纵断面图中,并作为过滤器按钮,根据它们拥有的标签名称显示帖子 然而,在我尝试实现这一总体结果时,我陷入了困境,因为每次我提交带有标签的帖子时,标签数组总是在视图中显示为空 我的邮箱是: <?php use Illuminate\Database\Migrations\Migration; use Illuminate\Database\Schema\Blueprint; use Illuminate\Supp
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreatePostsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('posts', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('user_id');
$table->string('caption');
$table->string('url');
$table->string('image');
$table->text('tags');
$table->timestamps();
$table->index('user_id');
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('posts');
}
}
我创建帖子的表单是:
<form action="/posts" enctype="multipart/form-data" method="post">
@csrf
<div class="form-group">
<label for="caption" class="create_caption_label">Post Caption</label>
<div class="create_caption_div">
<input id="caption"
type="text"
class="form-control @error('caption') is-invalid @enderror"
name="caption"
value="{{ old('caption') ?? '' }}"
autocomplete="caption" autofocus>
@error('caption')
<div class="invalid-feedback-div">
<span class="invalid-feedback" role="alert">
<strong>{{ $message }}</strong>
</span>
</div>
@enderror
</div>
</div>
<div class="form-group">
<label for="tags" class="create_tags_label">Tags</label>
<div class="create_tags_div">
<input id="tags"
type="text"
data-role="tagsinput"
class="form-control @error('tags') is-invalid @enderror"
name="tags"
value="{{ old('tags') ?? '' }}"
autocomplete="tags" autofocus>
@error('tags')
<div class="invalid-feedback-div">
<span class="invalid-feedback" role="alert">
<strong>{{ $message }}</strong>
</span>
</div>
@enderror
</div>
</div>
<div class="form-group">
<label for="url" class="edit_title_label">URL</label>
<div class="edit_url_div">
<input id="url"
type="text"
class="form-control @error('url') is-invalid @enderror"
name="url"
value="{{ '' }}"
autocomplete="url" autofocus>
@error('url')
<div class="invalid-feedback-div">
<span class="invalid-feedback" role="alert">
<strong>{{ $message }}</strong>
</span>
</div>
@enderror
</div>
</div>
<div class="create_post_image_div">
<label for="image" class="create_image_label">Post Image</label>
<input type="file" class="form-control-file" id="image" name="image">
@error('image')
<div class="invalid-feedback-div">
<strong>{{ $message }}</strong>
</div>
@enderror
<div class="create_post_btn_div">
<button class="create_post_btn">Save Post</button>
</div>
</div>
</form>
@csrf
后标题
@错误('标题')
{{$message}}
@恩德罗
标签
@错误('标记')
{{$message}}
@恩德罗
统一资源定位地址
@错误('url')
{{$message}}
@恩德罗
后像
@错误('图像')
{{$message}}
@恩德罗
邮政储蓄
最后,我的观点是:(这是提交帖子后标签数组显示为空的地方)
@foreach($user->posts as$post)
发布:{{{$post->created_at->diffForHumans()}
1个
1条评论
image}“class=“carousel\u img\u占位符”>
(像)
(评论)
{{{$user->username}-{{{$post->caption}
{{$post->caption}
标签:
@foreach($post->tags as$tag)
{{$tag->name}
@endforeach
@endforeach
我如何解决这个问题
此外,我如何允许标记作为过滤器按钮,根据它们拥有的标记名称显示帖子?您可以将标记保存为数据库中的json数组。然后在模型中转换为数组,这样在检索时它将自动成为数组。保存时,将标记传递为数组,然后它将自动转换为json string
protected $casts = [
'tags' => 'array',
];
您正在将标记保存为文本,而不是JSON。因此您在foreach中无法获得它。此外,请检查是否保存了帖子的其他详细信息?检查此项。帖子的所有详细信息都保存在数据库中。我尝试将标记保存为JSON,但标记仍然没有显示在视图中。我还尝试应用您发送的链接中的代码。这实际上是一个previo我使用的是us资源,但结果让我感到困惑。我尝试将其保存为json,但不起作用。在尝试保存到数据库中时,您必须将标记作为数组传递。您可以多次使用select2。
<form action="/posts" enctype="multipart/form-data" method="post">
@csrf
<div class="form-group">
<label for="caption" class="create_caption_label">Post Caption</label>
<div class="create_caption_div">
<input id="caption"
type="text"
class="form-control @error('caption') is-invalid @enderror"
name="caption"
value="{{ old('caption') ?? '' }}"
autocomplete="caption" autofocus>
@error('caption')
<div class="invalid-feedback-div">
<span class="invalid-feedback" role="alert">
<strong>{{ $message }}</strong>
</span>
</div>
@enderror
</div>
</div>
<div class="form-group">
<label for="tags" class="create_tags_label">Tags</label>
<div class="create_tags_div">
<input id="tags"
type="text"
data-role="tagsinput"
class="form-control @error('tags') is-invalid @enderror"
name="tags"
value="{{ old('tags') ?? '' }}"
autocomplete="tags" autofocus>
@error('tags')
<div class="invalid-feedback-div">
<span class="invalid-feedback" role="alert">
<strong>{{ $message }}</strong>
</span>
</div>
@enderror
</div>
</div>
<div class="form-group">
<label for="url" class="edit_title_label">URL</label>
<div class="edit_url_div">
<input id="url"
type="text"
class="form-control @error('url') is-invalid @enderror"
name="url"
value="{{ '' }}"
autocomplete="url" autofocus>
@error('url')
<div class="invalid-feedback-div">
<span class="invalid-feedback" role="alert">
<strong>{{ $message }}</strong>
</span>
</div>
@enderror
</div>
</div>
<div class="create_post_image_div">
<label for="image" class="create_image_label">Post Image</label>
<input type="file" class="form-control-file" id="image" name="image">
@error('image')
<div class="invalid-feedback-div">
<strong>{{ $message }}</strong>
</div>
@enderror
<div class="create_post_btn_div">
<button class="create_post_btn">Save Post</button>
</div>
</div>
</form>
@foreach( $user->posts as $post )
<div class="carousel_posts_container">
<div class="post_date_and_edit_div">
<div class="posted_date_div">
<p class="posted_date">posted: {{ $post->created_at->diffForHumans() }}</p>
</div>
<div class="post_edit_div">
<form action="/posts/{{$post->id}}/edit">
<input class="post_edit_btn" type="submit" value="• • •">
</form>
</div>
</div>
<div class="post_counter_div">
<p class="post_counter">1 like</p>
</div>
<div class="post_counter_div">
<p class="post_counter">1 comment</p>
</div>
<div class="carousel_post_img_div">
<img src="/storage/{{ $post->image }}" class="carousel_img_placeholder">
</div>
<div class="like_comment_view_container">
<div class="view_btn_div">
<form action="{{$post->url}}">
<input class="like_comment_view_btns" type="submit" value="( View Post )">
</form>
</div>
<div class="like_btn_div">
<button type="button" class="like_comment_view_btns">( Like )</button>
</div>
<div class="comment_btn_div">
<button type="button" class="like_comment_view_btns">( Comment )</button>
</div>
</div>
<div class="carousel_caption_container">
<div class="carousel_caption_div">
<p class="carousel_caption_username">{{$user->username}} - {{$post->caption}}</p>
<p class="carousel_caption">{{$post->caption}}</p>
</div>
<div class="post-tags mb-4">
<strong>Tags : </strong>
@foreach($post->tags as $tag)
<span class="badge badge-info">{{$tag->name}}</span>
@endforeach
</div>
</div>
</div>
@endforeach
protected $casts = [
'tags' => 'array',
];