I'm working on an MVC application in DevExpress, I have a table that has members I would like to changes the orders or add orders by year but the members would stay the same, so I don't have to re-enter all the members every year just update prices for each member and if the member doesn't have ordered it would show 0
What I have tried so far is I have a master-detail grid and I have the model created
public class AppYear
{
public int AppYearId { get; set; }
public DateTime AppDateTime { get; set; }
public ICollection<MemberBenefit> MemberBenefits { get; set; }
}
public class Dependent
{
public int DependentId { get; set; }
[Required]
public string FirstName { get; set; }
[Required]
public string LastName { get; set; }
public DateTime? DateOfBirth { get; set; }
public int MemberId { get; set; }
public Member Member { get; set; }
public int MemberBenefitId { get; set; }
public MemberBenefit MemberBenefit { get; set; }
}
public class MemberBenefit{
public int MemberBenefitId { get; set; }
[Column(TypeName = "Money")]
public decimal Tmhhea { get; set; }
[Column(TypeName = "Money")]
public decimal Tmna { get; set; }
public int AppYearId { get; set; }
public AppYear AppYear { get; set; }
public ICollection<Dependent> Dependents { get; set; }
}
I don't know if the relation is correct in database models, but I need an idea on how to change only the member benefits and keeping the dependent the same when you change the year a new the member benefit would default to 0
Related
It's a class where i need to add item in Subtasks with Ef Core. Have no idea how to do it. Please help!
public class Do
{
[Key]
public int Id { get; set; }
[Required]
public string Title { get; set; }
[Required]
public string Description { get; set; }
public string Executors { get; set; }
public DoStatus Status { get; set; }
public DateTime Created { get; set; } = DateTime.Now;
[Required]
public int Plan { get; set; }
public int Fact { get; set; }
public DateTime? Finished { get; set; }
public virtual ICollection<Do> SubTasks { get; set; } = new List<Do>();
}
you need to learn about the recursive CTE relationship
for the date configure there with Api
builder.Property(p => p.Created).HasDefaultValueSql("(newid())")
public class Task
{
[Key]
public int Id { get; set; }
[Required]
public string Title { get; set; }
[Required]
public string Description { get; set; }
public string Executors { get; set; }
public DoStatus Status { get; set; }
public DateTime Created { get; set; };
[Required]
public int Plan { get; set; }
public int Fact { get; set; }
public DateTime? Finished { get; set; }
public int DoId { get; set; } // id parent
public virtual List<Task> SubTasks { get; set; };
}
var id = 1 // id Do
var subTasks = db.Task.include(s => s.SubTasks).where(s => e.DoId = id).ToList()
I'm trying to write a View Model in an ASP.NET MVC5 project to show data from different tables on a form that the user can then edit and save. I'm using the following :-
VS 2017, c#, MySQL Database, Entity Framework 6.1.3, MySQL Connector 6.9.9, Code First from Database (existing database that I can't change)
To complicate matters, there are no links between the tables in the database, so I cannot work out how to create a suitable View Model that will then allow me to save the changes.
Here are the 4 table models :-
public partial class evc_bearer
{
[Key]
[Column(Order = 0]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public long evcid { get; set; }
[Key]
[Column(Order = 1]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public long bearerid { get; set; }
public int vlan { get; set; }
[Column("ref")]
public string _ref { get; set; }
[Required]
public string port { get; set; }
[Required]
public string endpoint { get; set; }
}
public partial class bearer
{
[Key]
public long id { get; set; }
[Column("ref")]
[Required]
public string _ref { get; set; }
public string name { get; set; }
public long? site { get; set; }
public long? provider { get; set; }
public long? mtu { get; set; }
public float? rental { get; set; }
public int? offsiteprovider { get; set; }
public float? offsiteproviderrental { get; set; }
public bool? aend { get; set; }
public int? equipmentport { get; set; }
public string orderref { get; set; }
public string offsiteref { get; set; }
public string notes { get; set; }
public float? bookingfactor { get; set; }
}
public partial class evc
{
[Key]
public long id { get; set; }
[Required]
public string type { get; set; }
public byte servicetype { get; set; }
public byte cos { get; set; }
public int cir { get; set; }
public int pir { get; set; }
public bool burst { get; set; }
[Column("ref")]
public string _ref { get; set; }
public string orderref { get; set; }
public byte state { get; set; }
public string notes { get; set; }
public float? rental { get; set; }
}
public partial class evc_provider
{
[Key]
public long id { get; set; }
[Required]
public string provider { get; set; }
}
This is the View Model I tried writing :-
public partial class evcBearersVM
{
[Key]
[Column(Order = 0)]
public long evcid { get; set; }
[Key]
[Column(Order = 1)]
public long id { get; set; }
[Column("ref")]
public string b_ref { get; set; }
public string b_name { get; set; }
public string ep_provider { get; set; }
public int eb_vlan { get; set; }
public string eb_port { get; set; }
public string eb_endpoint { get; set; }
}
This is the Linq query I used to populate the View Model :-
IQueryable<evcBearersVM> data = from eb in csdb.evc_bearers
join b in csdb.bearers on eb.bearerid equals b.id
join ep in csdb.evc_providers on b.provider equals ep.id
join e in csdb.evcs on eb.evcid equals e.id
where (eb.evcid == evcid && b.id == id)
select new evcBearersVM
{
evcid = eb.evcid,
id = b.id,
b_ref = b._ref,
b_name = b.name,
ep_provider = ep.provider,
eb_vlan = eb.vlan,
eb_port = eb.port,
eb_endpoint = eb._ref
};
So the query works and joins the tables to get the data I need and I can display this date in various views as needed. What I now need to do is be able to edit a row and save it back to the database. I have an Edit View that is showing the data I need but I'm not sure how to save changes given that it's a View Model and the DB Context isn't aware of it. Grateful for any help.
What you should do is, use the same view model as your HttpPost action method parameter and inside the action method, read the entities you want to udpate using the Id's (you can get this from the view model, assuming your form is submitting those) and update only those properties you need to update.
[HttpPost]
public ActionResult Edit(evcBearersVM model)
{
var b = csdb.bearers.FirstOrDefault(a=>a.id==model.id);
if(b!=null)
{
b.name = model.b_name;
b._ref = model.b_ref;
csdb.SaveChanges();
}
// Update the other entity as well.
return RedirectToAction("Index");
}
I have following model classes
Each Item has 4 languages in perticular languages table
public class Item
{
[Key]
public int Id { get; set; }
public DateTime? ExpireDate { get; set; }
}
public class ItemLanguage
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
[ForeignKey("Language")]
public int LanguageId { get; set; }
[ForeignKey("Item")]
public int ItemId { get; set; }
public Language Language { get; set; }
public Item Item { get; set; }
}
Each item library has 4 languages in perticular language table
public class ItemLibrary
{
[Key]
public int Id { get; set; }
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd MMM yyyy}")]
public DateTime? ExpireDate { get; set; }
}
public class ItemLibraryLanguage
{
[Key]
public int Id { get; set; }
[Required]
public string Name { get; set; }
[ForeignKey("Language")]
public int LanguageId { get; set; }
[ForeignKey("ItemLibrary")]
public int ItemLibraryId { get; set; }
public ItemLibrary ItemLibrary { get; set; }
public Language Language { get; set; }
}
Now I want to add items to the ItemLibraryItems table.
It need to save the ItemId and the ItemLibraryId in this table(Not the languageId). When displaying the selected items for the library it needs to show the according to the selected language in login.
public class ItemLibraryItem
{
[Key]
public int Id { get; set; }
[ForeignKey("ItemLibrary")]
public int ItemLibraryId { get; set; }
[ForeignKey("Item")]
public int ItemId { get; set; }
public ItemLibrary ItemLibrary { get; set; }
public Item Item { get; set; }
}
But when I'm trying to create the Controller by using ItemLibraryItem as the model class it gives the error
The entity types 'ItemLibraryItem' and 'ItemLibraryLanguage' cannot share table 'ItemLibraryLanguages' because they are not in the same type hierarchy or do not have a valid one to one foreign key relationship with matching primary keys between them.
I have 3 tables that needs to be combined in one table. On below you can see the codes.
The problem is each player could play on one or more team on each tournament. Players and teams arranger by every new tournament.
So how can i map it with fluent api or maybe there is a better way to solve it. Thanks from now on.
public class Player
{
public int PlayerID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Phone { get; set; }
public DateTime TimeStamp { get; set; }
public ICollection<Team> Teams { get; set; }
public ICollection<Tournament> Tournaments { get; set; }
}
public class Team
{
public int TeamID { get; set; }
public string Name { get; set; }
public DateTime TimeStamp { get; set; }
public ICollection<Player> Players { get; set; }
public ICollection<Tournament> Tournaments { get; set; }
}
public class Tournament
{
public int TournamentID { get; set; }
public DateTime Date { get; set; }
public int PlaceID { get; set; }
public DateTime TimeStamp { get; set; }
public virtual Place Place { get; set; }
public ICollection<Player> Players { get; set; }
public ICollection<Team> Teams { get; set; }
}
public class BPContext : DbContext
{
public DbSet<Tournament> Tournaments { get; set; }
public DbSet<Place> Places { get; set; }
public DbSet<Table> Tables { get; set; }
public DbSet<Player> Players { get; set; }
public DbSet<Team> Teams { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
}
I don't see what are you trying to accomplish with this. You have tables that contain all players, all teams and all tournaments.
I suppose there will be a match to be played? What you can do is create another table Matches, to use entity similar to this:
public class Match
{
[Key]
public int MatchId {get;set;}
[ForeignKey("Tournament")]
public int TournamentId {get;set;}
[InverseProperty("Matches")]
public virtual List<Team> Teams {get;set;}
[InverseProperty("Matches")]
public virtual List<Player> Players {get;set;}
[InverseProperty("Matches")]
public virtual Tournament Tournament {get;set;}
}
This new entity holds all 3 previous entities. However you have to modify previous ones to include these changes:
public class Player
{
public int PlayerID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Phone { get; set; }
public DateTime TimeStamp { get; set; }
[InverseProperty("Players")]
public virtual List<Match> Matches { get; set; }
[InverseProperty("Players")]
public virtual List<Team> Teams {get;set;}
}
Getting all tournaments for player can be done with LINQ : ctx.Players.Where(x => x.PlayerId == 15).Matches.Select(x => x.TournamentId).
If you want to see all the players in a tournament: ctx.Matches.Where(x => x.TournamentId ==15).Players.Select(x => x.Name).
public class Team
{
public int TeamID { get; set; }
public string Name { get; set; }
public DateTime TimeStamp { get; set; }
[InverseProperty("Teams")]
public List<Match> Matches {get;set;}
[InverseProperty("Teams")]
public List<Player> Players {get;set;}
}
public class Tournament
{
public int TournamentID { get; set; }
public DateTime Date { get; set; }
public int PlaceID { get; set; }
public DateTime TimeStamp { get; set; }
public virtual Place Place { get; set; }
[InverseProperty("Tournament")]
public virtual List<Match> Matches {get;set;}
}
which is the best way or if you have seen an example of which is the best way or a way to display to the user a view with this model and if you have and link example will be better
public class Student
{
public int StudentID { get; set; }
public string FirstMidName { get; set; }
public virtual ICollection<Enrollment> Enrollments { get; set; }
}
public class Enrollment
{
public int EnrollmentID { get; set; }
public int CourseID { get; set; }
public int StudentID { get; set; }
public decimal? Grade { get; set; }
public virtual Course Course { get; set; }
public virtual Student Student { get; set; }
}
public class Course
{
public int CourseID { get; set; }
public string Title { get; set; }
public virtual ICollection<Enrollment> Enrollments { get; set; }
}