1 public function create(Request $request){
 2 
 3         if($request->isMethod(‘POST‘)){
 4             $data = $request->input(‘Student‘);
 5             
 6             //1、控制器验证
 7             //如果通过，继续向下执行，没有通过，重定向到上一个页面
 8             //抛出一个异常，通过中间件将错误信息存到session里
 9             /*
10             $this->validate($request,[
11                 ‘Student.name‘ => ‘required|min:2|max:20‘,
12                 ‘Student.age‘ => ‘required|integer‘,
13             ], [
14                 ‘required‘ => ‘:attribute:为必填项,‘,
15             ], [
16                 ‘Student.name‘ => ‘姓名‘,
17                 ‘Student.age‘ =   > ‘年龄‘,
18             ]);
19             */
20             //2、Validator类验证
21             $validator = \Validator::make($reuqest->input,[
22                 ‘Student.name‘ => ‘required|min:2|max:20‘,
23                 ‘Student.age‘ => ‘required|integer‘,
24             ], [
25                 ‘required‘ => ‘:attribute:为必填项,‘,
26             ], [
27                 ‘Student.name‘ => ‘姓名‘,
28                 ‘Student.age‘ =   > ‘年龄‘,
29             ]);
30             //withInput()自动保持，验证失败时自动保持
31             //在表单里设置其value=http://www.mamicode.com/{{ old(‘Student‘)[‘name‘]}}
32             if($validator->fails()){
33                 return redirct()->back()
34                     ->withErrors($validator)
35                     ->withInput();
36                 //没有错误信息，需要t通过withErrors()手动注册
37             }
38 
39             if(Student::create($data)){
40                 //开启session
41                 return redirect(‘people/student/index‘)
42                             ->with(‘success‘,‘添加成功‘)；
43             }else{
44                 return redirect()->back();
45             }
46         }
47     }