Question

我正在尝试使用嵌套关系上的嵌套行详细信息查看laravel数据表。以下是我所做的细节

数据库关系

我希望数据表在页面加载时查看所有产品，然后第一级行详细信息将显示产品的所有组件。第二级行详细信息将显示组件中的所有子组件。

这是我的数据表视图的当前结果

如图所示，数据表无法显示子组件的原始材料名称。以下是我的雄辩模型和关系。

产品型号

protected $table = 'products';

public function components() {

    return $this->hasMany('App\Component', 'product_id', 'id');

}

组件模型

protected $table = 'components';

public function comp_subcomps() {

    /*The syntax ->with('subcomponents') seems WORKING fine in resulting 
        the second level row detail ( viewing the subcomponents of a component )*/

    return $this->hasMany('App\CompToSubComp', 'component_id', 'id')->with('subcomponents');

}

CompToSubComp模型

protected $table = 'comp_subcomp';

public function subcomponents() {

        /* This syntax ->with('rawmaterials') seems NOT WORKING to 
            get the material name in the second level row detail */

    return $this->belongsTo('App\SubComponent', 'subcomponent_id', 'id')->with('rawmaterials');

}

子组件模型

protected $table = 'subcomponents';

public function rawmaterials() {

    return $this->belongsTo('App\Rawmaterial', 'rawmaterial_id', 'id');

}

CONTROLLER

/* On page load */

public function viewTable() {

    $products = Product::select();

    return Datatables::of($products)
        ->addColumn('details_url', function($product) {
            return url('/product/getdetaildata/' . $product->id);
        })->make(true);
}

/* First level row detail ( showing components of a product ) */

public function getDetailsData($id)
{
    $components = Product::find($id)->components();

    return Datatables::of($components)
        ->addColumn('moredetails_url', function($component) {
            return url('/product/getmoredetail/' . $component->id);
        })->make(true);
}

/* Second level row detail ( showing sub-components of a component ) */

public function getMoreDetailsData($id) {

    $compsubcomp = Component::find($id)->comp_subcomps();

    return Datatables::of($compsubcomp )->make(true);
}

JS DATATABLE

/* On load: Its working */

var dt = $('#example').DataTable({
            ...
            "columns": [
                { "data": "id", "name": "id" },
                { "data": "name", "name": "name"}
            ]
        });

/* First level row detail: Its working */

var tabComponent = $('#' + tableId).DataTable({
            ...
            "columns": [
                { "data": "id", "name": "id" },
                { "data": "name", "name": "name" }
            ]
        });

/* Second level: This PROBLEM exists where RAWMATERIAL NAME is not showing */

$('#' + tableId).DataTable({
            ...
            "columns": [
                { "data": "id", "name": "subcomponents.id" },
                { "data": "name", "name": "subcomponents.name" },
                { "data": "rawmaterial_id", "name": "subcomponents.rawmaterial_id" },
                { "data": "subcomponents.rawmaterials.name", "name": "subcomponents.rawmaterials.name" }
            ]
        });

如何正确查看数据表中'rawmaterials'和'subcomponents'之间的关系？

任何帮助识别我的错误将不胜感激。提前谢谢。

Laravel数据表嵌套关系的嵌套行详细信息

0 个答案: