iot/labs/Teacher/TeacherExt/Data/TeacherDbContext.cs

using Microsoft.EntityFrameworkCore;
using TeacherExt.Entities;

namespace TeacherExt.Data
{
    public class TeacherDbContext : DbContext
    {
        public TeacherDbContext(DbContextOptions<TeacherDbContext> options) : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.Entity<Organ>().HasKey(o => o.Id);
            modelBuilder.Entity<Organ>().Property(o => o.Name).IsRequired();
            modelBuilder.Entity<Organ>().Property(o => o.Number).IsRequired();
            modelBuilder.Entity<Organ>().HasIndex(o => o.Number).IsUnique();
            modelBuilder.Entity<Organ>().HasOne(o => o.Parent).WithMany(o => o.Children).HasForeignKey(o=>o.ParentId).OnDelete(DeleteBehavior.SetNull);
            modelBuilder.Entity<User>().HasKey(o => o.Id);
            modelBuilder.Entity<User>().Property(o => o.UserName).IsRequired();
            modelBuilder.Entity<User>().HasIndex(o => o.UserName).IsUnique();
            modelBuilder.Entity<User>().HasOne(o => o.Organ).WithMany(o => o.Users).HasForeignKey(o => o.OrganId).OnDelete(DeleteBehavior.Cascade);
            modelBuilder.Entity<Role>().HasKey(o => o.Id);
            modelBuilder.Entity<Role>().Property(o => o.Name).IsRequired();
            modelBuilder.Entity<Role>().HasIndex(o => o.Name).IsUnique(); 
            modelBuilder.Entity<UserRole>().HasOne(o => o.User).WithMany(o => o.UserRoles).HasForeignKey(o => o.UserId).OnDelete(DeleteBehavior.Cascade);
            modelBuilder.Entity<UserRole>().HasOne(o => o.Role).WithMany(o => o.UserRoles).HasForeignKey(o => o.RoleId).OnDelete(DeleteBehavior.Cascade);
            modelBuilder.Entity<UserRole>().HasIndex(o => new { o.UserId, o.RoleId }).IsUnique();
            modelBuilder.Entity<CheckLog>().HasKey(o => o.Id);
            modelBuilder.Entity<Teacher>().HasKey(o => o.Id);
            modelBuilder.Entity<Teacher>().Property(o => o.Id).ValueGeneratedNever();
            modelBuilder.Entity<TeacherInfo>().HasIndex(o => o.Id);
            modelBuilder.Entity<TeacherInfo>().Property(o => o.Id).ValueGeneratedNever();
            modelBuilder.Entity<TeacherInfo>().HasOne(o => o.Teacher).WithOne(o => o.Info).HasForeignKey<TeacherInfo>(o=>o.TeacherId).OnDelete(DeleteBehavior.Cascade);
            modelBuilder.Entity<TeacherProp>().HasKey(o => o.Id);
            modelBuilder.Entity<TeacherProp>().Property(o => o.Id).ValueGeneratedNever();
            modelBuilder.Entity<TeacherProp>().HasOne(o => o.Teacher).WithOne(o => o.Prop).HasForeignKey<TeacherProp>(o => o.TeacherId).OnDelete(DeleteBehavior.Cascade);
            //
            modelBuilder.Entity<Teacher>().HasOne(o => o.User).WithOne(o => o.Teacher).HasForeignKey<Teacher>(o => o.UserId).OnDelete(DeleteBehavior.Cascade);
        }
    }
}