php - Laravel : Handle Integrity constraint violation error and return simplified error message

Question

我有一个应用程序，我想要三个字段的组合:rollyear , rollfaculty和 rollno在一个表中是唯一的。为此，我在迁移文件中执行了以下操作:

Schema::create('users', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('email');
            $table->string('rollyear');
            $table->string('rollfaculty');
            $table->string('rollno');
            $table->unique(['rollyear','rollfaculty','rollno']);
        });

这按预期工作，但每当向指定字段提供重复值时，我都会得到一整页 违反完整性约束 错误。
如何处理此错误并向用户提供简化的错误消息，如下图所示？

Answer 1

通过jQuery添加验证

将此文件保存在您的 public/js 文件夹中

这里是 a link !

并添加另一个验证文件以供注册

// validate signup form on keyup and submit
$("#addUserForm").validate({
            rules: {
                name:{
                    required:true
                },
                email: {
                    required: true,
                    email: true,
                    remote: {
                        url: "/checkuser",
                        type: "get"
                    }
                },
                password: {
                    required: true,
                    minlength: 5
                },
                image: {
                    required:true,
                    accept: "jpg|jpeg|png|JPG|JPEG|PNG"
                }
            },
            messages: {
                name: {
                    required:"Please enter a  name"
                },
                email: {
                    required:"Please enter a  email address",
                    email:"Please enter a valid email address",
                    remote:"Email Already Exist"
                },
                password: {
                    required: "Please provide a password",
                    minlength: "Your password must be at least 5 characters long"
                },
                image: {
                    required: "Please provide a profile image",
                    accept: "Please upload only jpg,jpeg,png"
                }
            }
});

添加/检查用户

public function checkUser()
{
    $user = User::where('email', request('email'))->exists();
     if($user){
        return 'false';
     }
     else {
        return 'true';
     }
}