Laravel基于枢轴表实现文章编辑页复选框选中状态的数据库回显

• 开发模块：带编辑能力的文章管理功能，文章与关联主题为多对多关系，通过数据库枢轴表（pivot table）存储关联数据
• 核心目标：打开文章编辑页面时，自动将文章首次创建时已勾选的主题复选框设置为选中状态
• 待解决问题：查阅资料得知可使用集合的contains方法判断复选框的选中状态，但不清楚具体实现逻辑

后端文章创建接口代码 #

public function createArticle(Request $request)
    {
       $data = $request->validate([ 
        'titreArticle' => 'bail|required|between:5,40',
        'typeArticle' => 'bail|required',
        'themeCheckbox' => 'required',
        'themeCheckbox.*' => 'required',
        'contenuArticle' => 'bail|required',
       ]);
       $type_articles = Type_article::findOrFail($data['typeArticle']);
       $article = new Article();

       $article->type_article()->associate($type_articles);
       $themes = Theme::whereIn('theme_id', array_keys($data['themeCheckbox']))->get();
       $article->titre = $data['titreArticle'];
       $article->contenu = $data['contenuArticle'];
       $article->save();
       $article->theme()->attach( $themes);

       return view('admin');
   }

Blade视图层复选框渲染代码 #

@foreach ($themes as $theme)  
  <div class="form-check form-check-inline">
      <input class="form-check-input" type="checkbox" name="themeCheckbox[{{$theme->theme_id}}]" value="1" > 
      <label class="form-check-label">{{ $theme->nom_theme }}</label>
  </div>
@endforeach

内容的提问来源于stack exchange，提问作者Leon