using _2021_backend.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace _2021_backend.Pages.Students
{
    public class CreateModel : PageModel
    {
        private readonly _2021_backend.Data.BackendContext Context;

        public CreateModel(_2021_backend.Data.BackendContext context)
        {
            Context = context;
        }

        public IActionResult OnGet()
        {
            Student = new Student();
            return Page();
        }

        

        [BindProperty]
        [Required(ErrorMessage = "该项不能为空")]
        public Student Student { get; set; }

        // To protect from overposting attacks, see https://aka.ms/RazorPagesCRUD
        public async Task<IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }
            if (Context.Students.Any(t => (t.Name == Student.Name || t.Stuid == Student.Stuid || t.Tel == Student.Tel)))
            {
                return RedirectToPage("./Index", new { pageId = 0, errInfo = "该学生已经存在" });
            }
            Context.Students.Add(Student);
            await Context.SaveChangesAsync();

            return RedirectToPage("./Index");
        }
    }
}