设置uuid
| namespace EF6SQLiteTutorial.Models |
| { |
| |
| public class People |
| { |
| public int Id { get; set; } |
| |
| public Guid Uuid { get; set; } = Guid.NewGuid(); |
| public string Name { get; set; } = string.Empty; |
| public int age { get; set; } = 18; |
| public string sex { get; set; } = "male"; |
| |
| } |
| |
| } |
| |
创建前检查
| using EF6SQLiteTutorial.Data; |
| using EF6SQLiteTutorial.Models; |
| using Microsoft.AspNetCore.Http; |
| using Microsoft.AspNetCore.Mvc; |
| using Microsoft.EntityFrameworkCore; |
| |
| namespace EF6SQLiteTutorial.Controllers |
| { |
| |
| [Route("api/[controller]")] |
| [ApiController] |
| public class RpgCharacterController : ControllerBase |
| { |
| private readonly DataContext _context; |
| |
| public RpgCharacterController(DataContext context) |
| { |
| _context = context; |
| } |
| |
| [HttpPost] |
| public async Task<ActionResult<List<RpgCharacter>>> AddCharacter(RpgCharacter character) |
| { |
| var existingRPG = await _context.RpgCharacters.FirstOrDefaultAsync(c => c.Name == character.Name); |
| if (existingRPG != null) |
| { |
| |
| return BadRequest("A rpg with the same name already exists."); |
| } |
| _context.RpgCharacters.Add(character); |
| await _context.SaveChangesAsync(); |
| |
| return Ok(await _context.RpgCharacters.ToListAsync()); |
| } |
| |
| |
| } |
| } |
| |
unique约束
| using Microsoft.EntityFrameworkCore; |
| using EF6SQLiteTutorial.Models; |
| |
| |
| |
| namespace EF6SQLiteTutorial.Data |
| { |
| public class DataContext : DbContext |
| { |
| public DataContext(DbContextOptions<DataContext> options) : base(options) |
| { |
| |
| } |
| |
| public DbSet<RpgCharacter> RpgCharacters => Set<RpgCharacter>(); |
| public DbSet<People> Peoples => Set<People>(); |
| |
| protected override void OnModelCreating(ModelBuilder modelBuilder) |
| { |
| |
| |
| modelBuilder.Entity<RpgCharacter>() |
| .HasIndex(c => c.Name) |
| .IsUnique(); |
| } |
| |
| } |
| |
| |
| |
| |
| } |
| |
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