How to connect Asp.Nets database with my own context?

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I'm trying to build an application in Mvc with Individual User Accounts, and I'm trying to connect the automatically generated database with my own context.
The problem I have when I trying to create a view of my Create method I get this errormessage:

There was an error running the selected code generator: 'Unable to
retrieve metadata for 'Projekt_Dejtingsida.Models.Messages' is not
valid. The navigation property 'ApplicationUser' was not found on the
dependent type 'Projekt_Dejtsida.Models.Messages'. The Name value
should be a valid navigation property name.

Please help a beginner out!

Here are the models I'm using:

I have already tried the protected override void OnModelCreating(DbModelBuilder modelBuilder) method, but it didn't work...

public class Messages {

    [Key, ForeignKey("ApplicationUser")]

    public string Id { get; set; }

    [Key]

    public int MessageId { get; set; }

    public virtual ApplicationUser Sender { get; set; }

    public virtual ApplicationUser Receiver { get; set; }

    [Required(AllowEmptyStrings = false, ErrorMessage = "You can't send a message without a content")]

    [StringLength(300, MinimumLength = 3, ErrorMessage = "Your message should be between 3 and 300 characters")]

    public string MessageContent { get; set; }

} 



public class FriendRequests {

    public string UserId { get; set; }

    [Key]

    public int RequestId { get; set; }

    public virtual ApplicationUser RequestTo { get; set; }

    public virtual ApplicationUser RequestFrom { get; set; }

    public bool Confirmed { get; set; }

}



public class Profile {

    [Key]

    public string UserId { get; set; }

    public byte ProfilePicture { get; set; }

    public string Firstname { get; set; }

    public int Age { get; set; }

    public string Gender { get; set; }

    public string City { get; set; }

    public string About { get; set; }

    public virtual ICollection<Messages> MyMessages { get; set; }



}

Here is the DbContext:

public class DatesiteContext : DbContext {



    public DatesiteContext() : base() { }       



    public DbSet<FriendRequests> Requests { get; set; }

    public DbSet<Messages> Messages { get; set; }

    public DbSet<Profile> Profiles { get; set; }

}

Here is the MessageController

[Authorize]

public class MessageController : Controller

{

    // GET: Message

    public ActionResult Index() 

    {

        var db = new DatesiteContext();

        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        return View(new MessageViewModel {

            Sender = msgs.Sender,

            Receiver = msgs.Receiver,

            MessageContent = msgs.MessageContent

        });

    }



    public ActionResult Create(MessageViewModel model) {

        DatesiteContext db = new DatesiteContext();



        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        if (msgs == null) {

            db.Messages.Add(new Messages {

                Id = userId,

                Sender = msgs.Sender,

                Receiver = msgs.Receiver,

                MessageContent = msgs.MessageContent

            });

        } else {

            msgs.Sender = model.Sender;

            msgs.Receiver = model.Receiver;

            msgs.MessageContent = model.MessageContent;

        }



        db.SaveChanges();



        return RedirectToAction("Index", "Profile");



    }

}

edited Jan 3 at 15:23

Amy

22k1876133

asked Jan 3 at 12:57

Yasmin Kamil

161

Where is your ApplicationUser class defined? If your ApplicationUser class is not an EF entity then you cannot use it as a navigation property.

– ethane
Jan 3 at 16:28

EF goes through your entities and interprets virtual properties as navigation properties to other entities. docs.microsoft.com/en-us/ef/core/modeling/relationships

– ethane
Jan 3 at 16:36

add a comment |

There was an error running the selected code generator: 'Unable to
retrieve metadata for 'Projekt_Dejtingsida.Models.Messages' is not
valid. The navigation property 'ApplicationUser' was not found on the
dependent type 'Projekt_Dejtsida.Models.Messages'. The Name value
should be a valid navigation property name.

Please help a beginner out!

Here are the models I'm using:

I have already tried the protected override void OnModelCreating(DbModelBuilder modelBuilder) method, but it didn't work...

public class Messages {

    [Key, ForeignKey("ApplicationUser")]

    public string Id { get; set; }

    [Key]

    public int MessageId { get; set; }

    public virtual ApplicationUser Sender { get; set; }

    public virtual ApplicationUser Receiver { get; set; }

    [Required(AllowEmptyStrings = false, ErrorMessage = "You can't send a message without a content")]

    [StringLength(300, MinimumLength = 3, ErrorMessage = "Your message should be between 3 and 300 characters")]

    public string MessageContent { get; set; }

} 



public class FriendRequests {

    public string UserId { get; set; }

    [Key]

    public int RequestId { get; set; }

    public virtual ApplicationUser RequestTo { get; set; }

    public virtual ApplicationUser RequestFrom { get; set; }

    public bool Confirmed { get; set; }

}



public class Profile {

    [Key]

    public string UserId { get; set; }

    public byte ProfilePicture { get; set; }

    public string Firstname { get; set; }

    public int Age { get; set; }

    public string Gender { get; set; }

    public string City { get; set; }

    public string About { get; set; }

    public virtual ICollection<Messages> MyMessages { get; set; }



}

Here is the DbContext:

public class DatesiteContext : DbContext {



    public DatesiteContext() : base() { }       



    public DbSet<FriendRequests> Requests { get; set; }

    public DbSet<Messages> Messages { get; set; }

    public DbSet<Profile> Profiles { get; set; }

}

Here is the MessageController

[Authorize]

public class MessageController : Controller

{

    // GET: Message

    public ActionResult Index() 

    {

        var db = new DatesiteContext();

        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        return View(new MessageViewModel {

            Sender = msgs.Sender,

            Receiver = msgs.Receiver,

            MessageContent = msgs.MessageContent

        });

    }



    public ActionResult Create(MessageViewModel model) {

        DatesiteContext db = new DatesiteContext();



        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        if (msgs == null) {

            db.Messages.Add(new Messages {

                Id = userId,

                Sender = msgs.Sender,

                Receiver = msgs.Receiver,

                MessageContent = msgs.MessageContent

            });

        } else {

            msgs.Sender = model.Sender;

            msgs.Receiver = model.Receiver;

            msgs.MessageContent = model.MessageContent;

        }



        db.SaveChanges();



        return RedirectToAction("Index", "Profile");



    }

}

edited Jan 3 at 15:23

Amy

22k1876133

asked Jan 3 at 12:57

Yasmin Kamil

161

Where is your ApplicationUser class defined? If your ApplicationUser class is not an EF entity then you cannot use it as a navigation property.

– ethane
Jan 3 at 16:28

EF goes through your entities and interprets virtual properties as navigation properties to other entities. docs.microsoft.com/en-us/ef/core/modeling/relationships

– ethane
Jan 3 at 16:36

add a comment |

There was an error running the selected code generator: 'Unable to
retrieve metadata for 'Projekt_Dejtingsida.Models.Messages' is not
valid. The navigation property 'ApplicationUser' was not found on the
dependent type 'Projekt_Dejtsida.Models.Messages'. The Name value
should be a valid navigation property name.

Please help a beginner out!

Here are the models I'm using:

I have already tried the protected override void OnModelCreating(DbModelBuilder modelBuilder) method, but it didn't work...

public class Messages {

    [Key, ForeignKey("ApplicationUser")]

    public string Id { get; set; }

    [Key]

    public int MessageId { get; set; }

    public virtual ApplicationUser Sender { get; set; }

    public virtual ApplicationUser Receiver { get; set; }

    [Required(AllowEmptyStrings = false, ErrorMessage = "You can't send a message without a content")]

    [StringLength(300, MinimumLength = 3, ErrorMessage = "Your message should be between 3 and 300 characters")]

    public string MessageContent { get; set; }

} 



public class FriendRequests {

    public string UserId { get; set; }

    [Key]

    public int RequestId { get; set; }

    public virtual ApplicationUser RequestTo { get; set; }

    public virtual ApplicationUser RequestFrom { get; set; }

    public bool Confirmed { get; set; }

}



public class Profile {

    [Key]

    public string UserId { get; set; }

    public byte ProfilePicture { get; set; }

    public string Firstname { get; set; }

    public int Age { get; set; }

    public string Gender { get; set; }

    public string City { get; set; }

    public string About { get; set; }

    public virtual ICollection<Messages> MyMessages { get; set; }



}

Here is the DbContext:

public class DatesiteContext : DbContext {



    public DatesiteContext() : base() { }       



    public DbSet<FriendRequests> Requests { get; set; }

    public DbSet<Messages> Messages { get; set; }

    public DbSet<Profile> Profiles { get; set; }

}

Here is the MessageController

[Authorize]

public class MessageController : Controller

{

    // GET: Message

    public ActionResult Index() 

    {

        var db = new DatesiteContext();

        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        return View(new MessageViewModel {

            Sender = msgs.Sender,

            Receiver = msgs.Receiver,

            MessageContent = msgs.MessageContent

        });

    }



    public ActionResult Create(MessageViewModel model) {

        DatesiteContext db = new DatesiteContext();



        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        if (msgs == null) {

            db.Messages.Add(new Messages {

                Id = userId,

                Sender = msgs.Sender,

                Receiver = msgs.Receiver,

                MessageContent = msgs.MessageContent

            });

        } else {

            msgs.Sender = model.Sender;

            msgs.Receiver = model.Receiver;

            msgs.MessageContent = model.MessageContent;

        }



        db.SaveChanges();



        return RedirectToAction("Index", "Profile");



    }

}

edited Jan 3 at 15:23

Amy

22k1876133

asked Jan 3 at 12:57

Yasmin Kamil

161

There was an error running the selected code generator: 'Unable to
retrieve metadata for 'Projekt_Dejtingsida.Models.Messages' is not
valid. The navigation property 'ApplicationUser' was not found on the
dependent type 'Projekt_Dejtsida.Models.Messages'. The Name value
should be a valid navigation property name.

Please help a beginner out!

Here are the models I'm using:

I have already tried the protected override void OnModelCreating(DbModelBuilder modelBuilder) method, but it didn't work...

public class Messages {

    [Key, ForeignKey("ApplicationUser")]

    public string Id { get; set; }

    [Key]

    public int MessageId { get; set; }

    public virtual ApplicationUser Sender { get; set; }

    public virtual ApplicationUser Receiver { get; set; }

    [Required(AllowEmptyStrings = false, ErrorMessage = "You can't send a message without a content")]

    [StringLength(300, MinimumLength = 3, ErrorMessage = "Your message should be between 3 and 300 characters")]

    public string MessageContent { get; set; }

} 



public class FriendRequests {

    public string UserId { get; set; }

    [Key]

    public int RequestId { get; set; }

    public virtual ApplicationUser RequestTo { get; set; }

    public virtual ApplicationUser RequestFrom { get; set; }

    public bool Confirmed { get; set; }

}



public class Profile {

    [Key]

    public string UserId { get; set; }

    public byte ProfilePicture { get; set; }

    public string Firstname { get; set; }

    public int Age { get; set; }

    public string Gender { get; set; }

    public string City { get; set; }

    public string About { get; set; }

    public virtual ICollection<Messages> MyMessages { get; set; }



}

Here is the DbContext:

public class DatesiteContext : DbContext {



    public DatesiteContext() : base() { }       



    public DbSet<FriendRequests> Requests { get; set; }

    public DbSet<Messages> Messages { get; set; }

    public DbSet<Profile> Profiles { get; set; }

}

Here is the MessageController

[Authorize]

public class MessageController : Controller

{

    // GET: Message

    public ActionResult Index() 

    {

        var db = new DatesiteContext();

        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        return View(new MessageViewModel {

            Sender = msgs.Sender,

            Receiver = msgs.Receiver,

            MessageContent = msgs.MessageContent

        });

    }



    public ActionResult Create(MessageViewModel model) {

        DatesiteContext db = new DatesiteContext();



        var userId = User.Identity.GetUserId();

        var msgs = db.Messages.FirstOrDefault(m => m.Id == userId);



        if (msgs == null) {

            db.Messages.Add(new Messages {

                Id = userId,

                Sender = msgs.Sender,

                Receiver = msgs.Receiver,

                MessageContent = msgs.MessageContent

            });

        } else {

            msgs.Sender = model.Sender;

            msgs.Receiver = model.Receiver;

            msgs.MessageContent = model.MessageContent;

        }



        db.SaveChanges();



        return RedirectToAction("Index", "Profile");



    }

}

c# .net database dbcontext

edited Jan 3 at 15:23

Amy

22k1876133

asked Jan 3 at 12:57

Yasmin Kamil

161

edited Jan 3 at 15:23

Amy

22k1876133

asked Jan 3 at 12:57

Yasmin Kamil

161

edited Jan 3 at 15:23

Amy

22k1876133

edited Jan 3 at 15:23

Amy

22k1876133

edited Jan 3 at 15:23

Amy

22k1876133

asked Jan 3 at 12:57

Yasmin Kamil

161

asked Jan 3 at 12:57

Yasmin Kamil

161

asked Jan 3 at 12:57

Yasmin Kamil

161

Where is your ApplicationUser class defined? If your ApplicationUser class is not an EF entity then you cannot use it as a navigation property.

– ethane
Jan 3 at 16:28

EF goes through your entities and interprets virtual properties as navigation properties to other entities. docs.microsoft.com/en-us/ef/core/modeling/relationships

– ethane
Jan 3 at 16:36

add a comment |

Where is your ApplicationUser class defined? If your ApplicationUser class is not an EF entity then you cannot use it as a navigation property.

– ethane
Jan 3 at 16:28

EF goes through your entities and interprets virtual properties as navigation properties to other entities. docs.microsoft.com/en-us/ef/core/modeling/relationships

– ethane
Jan 3 at 16:36

Where is your ApplicationUser class defined? If your ApplicationUser class is not an EF entity then you cannot use it as a navigation property.

– ethane
Jan 3 at 16:28

EF goes through your entities and interprets virtual properties as navigation properties to other entities. docs.microsoft.com/en-us/ef/core/modeling/relationships

– ethane
Jan 3 at 16:36

add a comment |

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