Laravel 使用 ajax 请求在同一个 table 中返回 children of parents？

Question

使用 Laravel 5.7 我有 table 个名字 territory_categories。在这个 table 我有 these Columns in the table 我如何使用与 ajax 请求的关系在同一个 table 中创建层次结构 parent 和 child？

Answer 1

You can write a simple self join for this scenario. In territory_categories model write a relationship.

public function children(){

  return $this->hasMany(territory_categories_model::class,'cat_parent_id', 'id');

}

Now from controller pass data to the view and write a foreach loop. You will be able to access the hierarchy structure.

$data = territory_categories_model::with('children')->get();

You will access the parent name also it's children now. For this case the parent will be repeating itself with each children

 @foreach($data as $dt)
    @if($dt->children->isNotEmpty())
       @foreach($dt->children as $child)
          <td>{{ $dt->territory_category_name }}</td>
          <td>{{ $child->territory_category_name }}</td>
       @endforeach
    @endif
 @endforeach

Answer 2

此代码运行良好，而不是上面一次此代码适用于型号：

public function children() {
    return $this->hasMany('Category','parent');
}
public function parent() {
    return $this->belongsTo('Category','parent');
}

我在控制器中使用这样的检索：

public function store(Request $request){
    if($request->territory_category_name){
      $validator = $request->validate(['territory_category_name' => 'required', 'active' => 'required']);
      $validator['cat_parent_id'] = $request->cat_parent_id;
      TerritoryCategory::create($validator);
    }
    $territoryCategories = TerritoryCategory::with('parent')->get();

    $data = [];
    foreach ($territoryCategories as $key => $territoryCategory){
      $key = ++$key;
      $data[] = "
      <tr>
        <td>$key</td>
        <td class='edit' data-url='/territoryCategory/update/$territoryCategory->id' data-id='$territoryCategory->id'>$territoryCategory->territory_category_name</td>
        <td>
          ".(isset($territoryCategory->parent->territory_category_name) ? $territoryCategory->parent->territory_category_name : '<badge class="badge badge-info"> Parent </badge>')."
        </td>
        <td>
          <input type='checkbox' name='active' ".($territoryCategory->active == 1 ? 'checked' : '')." disabled>
        </td>
        <td>
          <div class='btn-group' role='group' aria-label='First group'>
            <button data-method='PATCH' data-url='/territoryCategory/update/$territoryCategory->id' data-id='$territoryCategory->id' data-name='$territoryCategory->territory_category_name' data-active='$territoryCategory->active' type='button' class='btn btn-info territoryCategoryEdit' data-toggle='modal' data-target='#addTerritoryCategoryModal'><i class='la la-edit'></i></button>
            <button data-url='/territoryCategory/delete/$territoryCategory->id' data-id='$territoryCategory->id' type='button' class='btn btn-danger territoryCategorydelete'><i class='la la-trash'></i></button>
          </div>
        </td>
      </tr>
      ";
    }
    return response()->json(['success'=>'New Record added successfully!','territoryCategory' => $data]);
  }

Laravel 使用 ajax 请求在同一个 table 中返回 children of parents？

Laravel returning children of parents in same table using ajax request?

php

mysql

ajax

relationship

laravel