我想在注册时使用 MVC 中的 EF 模型与多对多关系添加多个角色

Question

我有角色的用户注册 table，我想通过多对多 Ef 模型生成的模型注册具有多个角色的新用户。

我在注册用户时遇到问题，新角色被插入到角色 table 中，然后这些新添加的角色被插入到 user_has_roles（交汇点）table。

这是注册表图片

这是数据库多对多关系 Tables Image

这是 EF 模型 Table 图片

我正在分享一些我写的代码

自动生成的模型类 user.cs

public partial class user
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public user()
    {
        this.user_role = new HashSet<user_role>();
    }

    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int user_id { get; set; }
    public string user_email { get; set; }
    public string user_full_name { get; set; }
    public string user_password { get; set; }
    public string user_phone { get; set; }
    public string user_mobile { get; set; }
    public Nullable<int> country_id { get; set; }
    public Nullable<int> city_id { get; set; }

    public virtual city city { get; set; }
    public virtual country country { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<user_role> user_role { get; set; }
}

user_role.cs

public partial class user_role
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public user_role()
    {
        this.users = new HashSet<user>();
    }

    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int user_role_id { get; set; }
    public string user_role_name { get; set; }
    public Nullable<int> user_role_status { get; set; }
    public string user_role_description { get; set; }

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<user> users { get; set; }
}

这是我的数据库上下文 class（自动生成

AccountDb.cs

public partial class SaholatEntities : DbContext
{
    public SaholatEntities()
        : base("name=SaholatEntities")
    {
    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        throw new UnintentionalCodeFirstException();
    }

    public virtual DbSet<city> cities { get; set; }
    public virtual DbSet<country> countries { get; set; }
    public virtual DbSet<sysdiagram> sysdiagrams { get; set; }
    public virtual DbSet<user> users { get; set; }
    public virtual DbSet<user_role> user_role { get; set; }

    public virtual int sp_alterdiagram(string diagramname, Nullable<int> owner_id, Nullable<int> version, byte[] definition)
    {
        var diagramnameParameter = diagramname != null ?
            new ObjectParameter("diagramname", diagramname) :
            new ObjectParameter("diagramname", typeof(string));

        var owner_idParameter = owner_id.HasValue ?
            new ObjectParameter("owner_id", owner_id) :
            new ObjectParameter("owner_id", typeof(int));

        var versionParameter = version.HasValue ?
            new ObjectParameter("version", version) :
            new ObjectParameter("version", typeof(int));

        var definitionParameter = definition != null ?
            new ObjectParameter("definition", definition) :
            new ObjectParameter("definition", typeof(byte[]));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("sp_alterdiagram", diagramnameParameter, owner_idParameter, versionParameter, definitionParameter);
    }

    public virtual int sp_creatediagram(string diagramname, Nullable<int> owner_id, Nullable<int> version, byte[] definition)
    {
        var diagramnameParameter = diagramname != null ?
            new ObjectParameter("diagramname", diagramname) :
            new ObjectParameter("diagramname", typeof(string));

        var owner_idParameter = owner_id.HasValue ?
            new ObjectParameter("owner_id", owner_id) :
            new ObjectParameter("owner_id", typeof(int));

        var versionParameter = version.HasValue ?
            new ObjectParameter("version", version) :
            new ObjectParameter("version", typeof(int));

        var definitionParameter = definition != null ?
            new ObjectParameter("definition", definition) :
            new ObjectParameter("definition", typeof(byte[]));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("sp_creatediagram", diagramnameParameter, owner_idParameter, versionParameter, definitionParameter);
    }

    public virtual int sp_dropdiagram(string diagramname, Nullable<int> owner_id)
    {
        var diagramnameParameter = diagramname != null ?
            new ObjectParameter("diagramname", diagramname) :
            new ObjectParameter("diagramname", typeof(string));

        var owner_idParameter = owner_id.HasValue ?
            new ObjectParameter("owner_id", owner_id) :
            new ObjectParameter("owner_id", typeof(int));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("sp_dropdiagram", diagramnameParameter, owner_idParameter);
    }

    public virtual ObjectResult<sp_helpdiagramdefinition_Result> sp_helpdiagramdefinition(string diagramname, Nullable<int> owner_id)
    {
        var diagramnameParameter = diagramname != null ?
            new ObjectParameter("diagramname", diagramname) :
            new ObjectParameter("diagramname", typeof(string));

        var owner_idParameter = owner_id.HasValue ?
            new ObjectParameter("owner_id", owner_id) :
            new ObjectParameter("owner_id", typeof(int));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<sp_helpdiagramdefinition_Result>("sp_helpdiagramdefinition", diagramnameParameter, owner_idParameter);
    }

    public virtual ObjectResult<sp_helpdiagrams_Result> sp_helpdiagrams(string diagramname, Nullable<int> owner_id)
    {
        var diagramnameParameter = diagramname != null ?
            new ObjectParameter("diagramname", diagramname) :
            new ObjectParameter("diagramname", typeof(string));

        var owner_idParameter = owner_id.HasValue ?
            new ObjectParameter("owner_id", owner_id) :
            new ObjectParameter("owner_id", typeof(int));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<sp_helpdiagrams_Result>("sp_helpdiagrams", diagramnameParameter, owner_idParameter);
    }

    public virtual int sp_renamediagram(string diagramname, Nullable<int> owner_id, string new_diagramname)
    {
        var diagramnameParameter = diagramname != null ?
            new ObjectParameter("diagramname", diagramname) :
            new ObjectParameter("diagramname", typeof(string));

        var owner_idParameter = owner_id.HasValue ?
            new ObjectParameter("owner_id", owner_id) :
            new ObjectParameter("owner_id", typeof(int));

        var new_diagramnameParameter = new_diagramname != null ?
            new ObjectParameter("new_diagramname", new_diagramname) :
            new ObjectParameter("new_diagramname", typeof(string));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("sp_renamediagram", diagramnameParameter, owner_idParameter, new_diagramnameParameter);
    }

    public virtual int sp_upgraddiagrams()
    {
        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("sp_upgraddiagrams");
    }
}

这是我注册用户的控制器方法 (POST)

    //post register
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Register(AccountVM obj)
    {
        if(ModelState.IsValid)
        {
            // insert Data into user variable array from obj viewmodel
            var user = new user()
            {
                user_email = obj.user_email,
                user_full_name = obj.user_full_name,
                user_password = obj.user_password,
                user_phone = obj.user_phone,
                user_mobile = obj.user_mobile,
                country_id = obj.country_id,
                city_id = obj.city_id
            };
            var user_roles = new user_role();

            AccountDb.users.Add(user);

            // insert Data into user_has_role variable array from obj viewmodel
            foreach(var item in obj.selectedRoleList)
            {
                user_roles.user_role_id = Convert.ToInt32(item);

                user_roles.users.Add(new user() { user_id = obj.user_id });

                user.user_role.Add(new user_role() { user_role_id = Convert.ToInt32(item) });

            }


            if (AccountDb.SaveChanges() > 0)
            {
                TempData["errorMsg"] = "save";
                return RedirectToAction("Index");
            }
            else
            {
                TempData["errorMsg"] = "queryError";
                ViewBag.country_id = new SelectList(AccountDb.countries, "country_id", "country_name");
                AccountVM objRole = new AccountVM();
                objRole.getRoleList = AccountDb.user_role.ToList();
                return View(objRole);
            }
        }
        else
        {
            TempData["errorMsg"] = "modelError";
            ViewBag.country_id = new SelectList(AccountDb.countries, "country_id", "country_name");
            AccountVM objRole = new AccountVM();
            objRole.getRoleList = AccountDb.user_role.ToList();
            return View(objRole);
        }
    }

我想注册具有多个角色的用户，并且角色已经由 multi-select 在角色 table select 中定义，请帮帮我

当我用 1 个角色注册用户时，新角色添加到角色 table 并且新添加的角色分配给用户（只有 role_id 添加到角色 table），并且如果我分配 2 个角色，那么 2 个将被添加到角色 table

已编辑 Image of Junction table after registration

Image of user_role table

Answer 1

试试这个。您不要将角色保存在 user_role table 中，而是将其保存在 user_has_role table 中。

var user = new user()
    {
        user_email = obj.user_email,
        user_full_name = obj.user_full_name,
        user_password = obj.user_password,
        user_phone = obj.user_phone,
        user_mobile = obj.user_mobile,
        country_id = obj.country_id,
        city_id = obj.city_id
    };
AccountDb.users.Add(user);
AccountDb.SaveChanges(); // save the user so that you can get the user_id 

// insert Data into user_has_role variable array from obj viewmodel
foreach(var item in obj.selectedRoleList)
{
    var user_role = new user_has_role
    {
        user_role_id = Convert.ToInt32(item),
        user_id = user.user_id
    };
    AccountDb.user_has_role.Add(user_role);
}
AccountDb.SaveChanges(); //save changes after all roles are assigned

Answer 2

我这样做解决了我的问题

//post register
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Register(AccountVM obj)
{
    if(ModelState.IsValid)
    {
        // insert Data into user variable array from obj viewmodel
        var user = new user()
        {
            user_email = obj.user_email,
            user_full_name = obj.user_full_name,
            user_password = obj.user_password,
            user_phone = obj.user_phone,
            user_mobile = obj.user_mobile,
            country_id = obj.country_id,
            city_id = obj.city_id
        };
        AccountDb.users.Add(user);

        // insert Data into user_has_role variable array from obj viewmodel
        foreach(var item in obj.selectedRoleList)
        {
            int id = Convert.ToInt32(item);
            user_role _user_role = AccountDb.user_role.FirstOrDefault(r => r.user_role_id == id);

            _user_role.users.Add(user);
            user.user_role.Add(_user_role);
        }

        if (AccountDb.SaveChanges() > 0)
        {
            TempData["errorMsg"] = "save";
            return RedirectToAction("Index");
        }
        else
        {
            TempData["errorMsg"] = "queryError";
            ViewBag.country_id = new SelectList(AccountDb.countries, "country_id", "country_name");
            AccountVM objRole = new AccountVM();
            objRole.getRoleList = AccountDb.user_role.ToList();
            return View(objRole);
        }
    }
    else
    {
        TempData["errorMsg"] = "modelError";
        ViewBag.country_id = new SelectList(AccountDb.countries, "country_id", "country_name");
        AccountVM objRole = new AccountVM();
        objRole.getRoleList = AccountDb.user_role.ToList();
        return View(objRole);
    }
}

我想在注册时使用 MVC 中的 EF 模型与多对多关系添加多个角色

I want to Add multiple Roles at the time of registeration with many to many relationship using EF Models in MVC

c#

model-view-controller

many-to-many

ef-model-first

ef-model-builder