diff --git a/DotBased.AspNet.Authority.EFCore/AuthorityContext.cs b/DotBased.AspNet.Authority.EFCore/AuthorityContext.cs
index 6a0f813..57dbaa8 100644
--- a/DotBased.AspNet.Authority.EFCore/AuthorityContext.cs
+++ b/DotBased.AspNet.Authority.EFCore/AuthorityContext.cs
@@ -1,3 +1,4 @@
+using DotBased.AspNet.Authority.EFCore.Models;
 using DotBased.AspNet.Authority.Models.Authority;
 using Microsoft.EntityFrameworkCore;
 
@@ -9,6 +10,10 @@ public class AuthorityContext(DbContextOptions<AuthorityContext> options) : DbCo
     public DbSet<AuthorityGroup> Groups { get; set; }
     public DbSet<AuthorityRole> Roles { get; set; }
     public DbSet<AuthorityUser> Users { get; set; }
+    
+    public DbSet<RoleGroup> RoleGroup { get; set; }
+    public DbSet<RoleUser> RoleUser { get; set; }
+    public DbSet<UserGroup> UserGroup { get; set; }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -29,6 +34,7 @@ public class AuthorityContext(DbContextOptions<AuthorityContext> options) : DbCo
         {
             roleEntity.ToTable("authority_roles");
             roleEntity.HasKey(x => x.Id);
+            roleEntity.HasMany(r => r.Attributes).WithOne().HasForeignKey(a => a.BoundId).OnDelete(DeleteBehavior.Cascade);
         });
         
         modelBuilder.Entity<AuthorityUser>(userEntity =>
@@ -37,6 +43,24 @@ public class AuthorityContext(DbContextOptions<AuthorityContext> options) : DbCo
             userEntity.HasKey(x => x.Id);
             userEntity.HasMany(u => u.Attributes).WithOne().HasForeignKey(a => a.BoundId).OnDelete(DeleteBehavior.Cascade);
         });
+
+        modelBuilder.Entity<RoleGroup>(rgEntity =>
+        {
+            rgEntity.ToTable("role_group");
+            rgEntity.HasKey(rg => new { rg.RoleId, rg.GroupId });
+        });
+
+        modelBuilder.Entity<RoleUser>(ruEntity =>
+        {
+            ruEntity.ToTable("role_user");
+            ruEntity.HasKey(ru => new { ru.RoleId, ru.UserId });
+        });
+
+        modelBuilder.Entity<UserGroup>(ugEntity =>
+        {
+            ugEntity.ToTable("user_group");
+            ugEntity.HasKey(ug => new { ug.UserId, ug.GroupId });
+        });
         
         base.OnModelCreating(modelBuilder);
     }
diff --git a/DotBased.AspNet.Authority.EFCore/Models/RoleGroup.cs b/DotBased.AspNet.Authority.EFCore/Models/RoleGroup.cs
new file mode 100644
index 0000000..1afe9a7
--- /dev/null
+++ b/DotBased.AspNet.Authority.EFCore/Models/RoleGroup.cs
@@ -0,0 +1,7 @@
+namespace DotBased.AspNet.Authority.EFCore.Models;
+
+public class RoleGroup
+{
+    public Guid RoleId { get; set; }
+    public Guid GroupId { get; set; }
+}
\ No newline at end of file
diff --git a/DotBased.AspNet.Authority.EFCore/Models/RoleUser.cs b/DotBased.AspNet.Authority.EFCore/Models/RoleUser.cs
new file mode 100644
index 0000000..c4a0917
--- /dev/null
+++ b/DotBased.AspNet.Authority.EFCore/Models/RoleUser.cs
@@ -0,0 +1,7 @@
+namespace DotBased.AspNet.Authority.EFCore.Models;
+
+public class RoleUser
+{
+    public Guid RoleId { get; set; }
+    public Guid UserId { get; set; }
+}
\ No newline at end of file
diff --git a/DotBased.AspNet.Authority.EFCore/Models/UserGroup.cs b/DotBased.AspNet.Authority.EFCore/Models/UserGroup.cs
new file mode 100644
index 0000000..648b376
--- /dev/null
+++ b/DotBased.AspNet.Authority.EFCore/Models/UserGroup.cs
@@ -0,0 +1,7 @@
+namespace DotBased.AspNet.Authority.EFCore.Models;
+
+public class UserGroup
+{
+    public Guid UserId { get; set; }
+    public Guid GroupId { get; set; }
+}
\ No newline at end of file
diff --git a/DotBased.AspNet.Authority/Models/Authority/AuthorityGroup.cs b/DotBased.AspNet.Authority/Models/Authority/AuthorityGroup.cs
index 05f85c9..fdcae2f 100755
--- a/DotBased.AspNet.Authority/Models/Authority/AuthorityGroup.cs
+++ b/DotBased.AspNet.Authority/Models/Authority/AuthorityGroup.cs
@@ -1,24 +1,18 @@
 namespace DotBased.AspNet.Authority.Models.Authority;
 
-public class AuthorityGroup
+public class AuthorityGroup()
 {
     public AuthorityGroup(string name) : this()
     {
         Name = name;
     }
-    
-    public AuthorityGroup()
-    {
-        Id = Guid.NewGuid();
-        CreatedDate = DateTime.Now;
-    }
-    
-    public Guid Id { get; set; }
-    
+
+    public Guid Id { get; set; } = Guid.NewGuid();
+
     public string? Name { get; set; }
 
     public long Version { get; set; }
     
-    public DateTime CreatedDate { get; set; }
+    public DateTime CreatedDate { get; set; } = DateTime.Now;
     public ICollection<AuthorityAttribute> Attributes { get; set; } = [];
 }
\ No newline at end of file
diff --git a/DotBased.AspNet.Authority/Models/Authority/AuthorityRole.cs b/DotBased.AspNet.Authority/Models/Authority/AuthorityRole.cs
index 1e215aa..d3efc45 100755
--- a/DotBased.AspNet.Authority/Models/Authority/AuthorityRole.cs
+++ b/DotBased.AspNet.Authority/Models/Authority/AuthorityRole.cs
@@ -15,5 +15,7 @@ public class AuthorityRole()
 
     public DateTime CreatedDate { get; set; } = DateTime.Now;
 
+    public IEnumerable<AuthorityAttribute> Attributes { get; set; } = [];
+
     public override string ToString() => Name ?? string.Empty;
 }
\ No newline at end of file