Laravel控制器传递多模型数据报错：undefined variable: sec_3

核心问题 #

Laravel的view()方法仅接受单个关联数组作为数据传递参数，你分开传递三个数组的写法是错误的。只有第一个数组$context里的变量bbs能被视图识别，后续的$context_2、$context_3不会被解析到视图中，这就是sec_3变量未定义的原因。

修复Controller代码 #

将三个数组合并为一个后再传给view()方法，以下是两种常用写法：

写法一：直接构造完整数据数组

class PreschoolInstitution3Controller extends Controller {
    public function index(){
        $data = [
            'bbs' => PreschoolInstitution3::latest()->get(),
            's' => PreschoolInstitution::latest()->get(),
            'sec_3' => TrainingPrograms::latest()->get()
        ]; 
        return view('our_employees', $data); 
    }
}

写法二：用compact()简化（可读性更强）

先单独定义变量，再用compact()打包成数组：

class PreschoolInstitution3Controller extends Controller {
    public function index(){
        $bbs = PreschoolInstitution3::latest()->get();
        $s = PreschoolInstitution::latest()->get();
        $sec_3 = TrainingPrograms::latest()->get();
        
        return view('our_employees', compact('bbs', 's', 'sec_3')); 
    }
}

额外优化（可选） #

你的blade模板存在HTML标签未闭合的问题（比如<td>{{$section_2->number}}<td>），虽不影响变量报错，但会导致页面结构异常，建议修正为：

@foreach ($s as $section_2) 
<tr> 
    <td>{{$section_2->number}}</td> 
    <td>{{$section_2->fullname }}</td> 
    <td>{{$section_2->post }}</td> 
    <td>{{$section_2->telephone }}</td> 
    <td>{{$section_2->email }}</td>
</tr>
@endforeach 

@foreach ($bbs as $section )
<tr>
    <td>{{$section->number}}</td>
    <td>{{$section->full_name}}</td>
    <td>{{$section->post}}</td>
    <td>{{$section->education}}</td>
    <td>{{$section->category}}</td>
    <td>{{$section->teaching_experience}}</td>
    <td>{{$section->professional_development}}</td>
</tr>
@endforeach 

@foreach ($sec_3 as $section_3)
<tr>
    <td>{{ $section_3->number }}</td>
    <td>{{ $section_3->level }}</td>
    <td>{{ $section_3->directions }}</td>
    <td>{{ $section_3->type_of_educational_program }}</td>
    <td>{{ $section_3->period_of_assimilation }}</td>
    <td>{{ $section_3->number_of_students }}</td>
</tr>
@endforeach

内容的提问来源于stack exchange，提问作者Kotomon