Hi I have model with to table and a one to many relationship between
Order and status
i want to show a list with all of properties in order and the last Title in status according to Order id in order
how could i get it?
thank you
this is my code :
namespace Pur.Models
{
using System;
using System.Collections.Generic;
public partial class Order
{
public int OrdeId { get; set; }
public Nullable<int> UserID { get; set; }
public Nullable<System.DateTime> OrderDate { get; set; }
public string Description { get; set; }
public int Quantity { get; set; }
public string Unit { get; set; }
public string Priority { get; set; }
public string Department { get; set; }
public virtual ICollection<Status> Status { get; set; }
}
}
and the other:
namespace Pur.Models
{
using System;
using System.Collections.Generic;
public partial class Status
{
public int StatusId { get; set; }
public string Title { get; set; }
public int OrderID { get; set; }
public Nullable<System.DateTime> StatusDate { get; set; }
public virtual Order Order { get; set; }
}
You can create join query and then pass it to a new model
var query = your query
var Lists = db.Database.SqlQuery<OrderModel>(query);
Related
Need to get all data from List without status and date
public class Locations
{
public string CompanyCode { get; set; }
public string SupplierId { get; set; }
public string LocationName { get; set; }
public int Status { get; set; }
public DteTime date{ get; set; }
public int ResultCode { get; set; }
public string ResultMessage { get; set; }
}
I getting all locations in below list, I want to avoid status and date from the results
List<Locations> results
You could make use Anonymous Types
results.Select(x=>new{x.CompanyCode,x.SupplierId,x.LocationName,x.ResultCode,x.ResultMessage})
Alternatively, you could create a Custom class with only the desired property and project it using Linq as shown in the example with Anonymous Types
or you can use deriving from class/interface and then cast to it ;)
you can do something like this:
public interface ILocationsPoorData
{
public string CompanyCode { get; set; }
public string SupplierId { get; set; }
public string LocationName { get; set; }
public int ResultCode { get; set; }
public string ResultMessage { get; set; }
}
class Locations:ILocationsPoorData
{
public string CompanyCode { get; set; }
public string SupplierId { get; set; }
public string LocationName { get; set; }
public int Status { get; set; }
public DteTime date{ get; set; }
public int ResultCode { get; set; }
public string ResultMessage { get; set; }
}
and in the end, when you'll have list of locations, you can do sth like this:
var newList = locationsList.select(x=> x as ILocationsPoorData)
or
var newList = locationsList.Cast<ILocationsPoorData>();
or you can create class instead of interface and do the same ;)
or you can use anonymous types like in previous answer
or you can create some value tuple instead of anonymous types ;)
So I changed up my databases and remade them. I followed the EF6 tutorial but encountered this error when trying to create a controller with views. I did some research on the error and people said to add data annotations and I tried [Key] but I keep getting the same error. Not sure if i've forgotten anything? Thanks!
"There was an error running the selected code generator: 'Unable to retrieve metadata for 'LinkDB.Models.Identifier.' Unable to determine the principal end of an association between the type 'LinkDB.Models.Identifier' and 'LinkDB.Models.Identity'. The principal end of this association must be explicity configured using either the relationship fluent API or data annotation.'
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
namespace LinksDB.Models
{
public class Identity
{
[Key]
public int ID { get; set; }
public int IdentifierID { get; set; }
public string contact { get; set; }
public string contactname { get; set; }
public string price { get; set; }
public virtual ICollection<Link> Links { get; set; }
public virtual Identifier Identifiers { get; set; }
public virtual Metric Metrics { get; set; }
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
namespace LinksDB.Models
{
public class Identifier
{
[Key]
public int ID { get; set; }
public string domain { get; set; }
public virtual ICollection<Link> Links { get; set; }
public virtual Identity Identitys { get; set; }
public virtual Metric Metrics { get; set; }
}
}
using LinksDB.Models;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;
namespace LinksDB.DAL
{
public class LinkData : DbContext
{
public LinkData() : base("LinkData")
{
}
public DbSet<Identifier> Identifiers { get; set; }
public DbSet<Identity> Identitys { get; set; }
public DbSet<Link> Links { get; set; }
public DbSet<Metric> Metrics { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
}
}
OK, if you want a 1:1 relationship between Identity and Identifier those models should look like below where the child (Indentifier) uses the IdentityId as both it's PK and FK. You can also do this with fluent code. Start with this and then add in your Metric and Links relationships.
public class Identity
{
[Key]
public int ID { get; set; }
public string contact { get; set; }
public string contactname { get; set; }
public string price { get; set; }
public virtual Identifier Identifier { get; set; }
}
public class Identifier
{
[Key, ForeignKey("Identity")]
public int IdentityID { get; set; }
public string domain { get; set; }
public virtual Identity Identity { get; set; }
}
Example here
I'm new to mvc. I've creted an MVC app, in which i have used code first approach. Right now i have two tables Deal and Comment. Now i want to add a new table Category in the database and new column categoryId in Deal table.
How i can update database and model?
I'm using Sql Server 2008 R2 for Database.
I've following structure of class:
namespace FBWebApp.Models
{
public class Deal
{
public int ID { get; set; } // ID
public string Title { get; set; } // Titolo del deal
public string Description { get; set; } // Descrizione dell'annuncio
public string FacebookUID { get; set; } // UID facebook dell'utente
public string Visibility { get; set; } // Visibility
public string Category { get; set; }
public int Option1 { get; set; }
public int Option2 { get; set; }
public int Option3 { get; set; }
public int Option4 { get; set; }
public string PhotoURL { get; set; } // URL of the facebook photo profile
public string Name { get; set; } // Name of the user
public string ProfileUrl { get; set; } // URL of the facebook profile
public string Photo1 { get; set; } // URL of the Photo1 (local )
public string Photo2 { get; set; }
public string Photo3 { get; set; }
public string Photo4 { get; set; }
public string Photo5 { get; set; }
}
public class Comment
{
[Key]
public int CommentId { get; set; }
public string CommentText { get; set; }
public int ID { get; set; }
[ForeignKey("ID")]
public Deal DelNav { get; set; }
}
public class DealDBContext : DbContext
{
public DealDBContext() : base("DealDBContext") { }
public DbSet<Deal> Deals { get; set; }
public DbSet<Comment> Comments { get; set; }
}
}
Try using 'update-database -force -verbose' in the Package Manager Console.
If it doesn't work, modify the migration but typing 'add-migration somename' and it will apear in the Migrations folder.
If you are new to MVC and EF, definitely check out this tutorial. It explains all about that and everything else you need to know:
http://pluralsight.com/training/Player?author=scott-allen&name=mvc4-building-m1-intro&mode=live&clip=0&course=mvc4-building
first add your model :
public class Category
{
public int ID { get; set; }
public int cateName { get; set; }
}
in Deal class :
public class Deal
{
//..
[ForeignKey("CatId")]
public virtual Category Category { get; set; }
}
after Enable Migration you should use this command in console manager to update your database :
update-database
I have an model like this:
public class EquipmentEmployee
{
public int EquipmentEmployeeID { get; set; }
public int EmployeeID { get; set; }
public Employee Employee { get; set; }
public int EquipmentID { get; set; }
public Equipment Equipment { get; set; }
public int RequisitionID { get; set; }
public Requisition Requisition { get; set; }
public DateTime From { get; set; }
public DateTime To { get; set; }
public string Comment { get; set; }
}
I use Mvc scaffolding for creating my controllers, repositories and views. Int the create View I'm not able to POST since I dont have values for "to" and "RequisitionID". I have not added [Required] to them. Is this possible? To POST and have those two null?
You should declare optional fields using a nullable type
public int? RequisitionID { get; set; }
To accept the null values you can use the following solution.
public int? RequisitionID { get; set; }
How do I model the following using Castle ActiveRecord?
I have two classes, Customer and Task.
I would like to reuse a third class, Note, stored in a Collection in each of the Customer and Task classes.
public class Note
{
public int ID { get; set; }
public string Subject { get; set; }
public string Body { get; set; }
}
public class Customer
{
public int ID { get; set; }
public IList<Note> Notes { get; set; }
}
public class Task
{
public int ID { get; set; }
public IList<Note> Notes { get; set; }
}
I would then like to be able to pass the Notes collection to a Gridview, Listview or Repeater in the relevant ASP.Net page for the Customer or Task classes.
I think what you need is to implement a type hierarchy. You can read about it here.
We settled on the following pattern:
[ActiveRecord]
public class Note
{
[PrimaryKey]
public int ID { get; set; }
[Property]
public string Subject { get; set; }
[Property]
public string Body { get; set; }
[BelongsTo]
public Customer Customer { get; set; }
[BelongsTo]
public Customer Task{ get; set; }
}
[ActiveRecord]
public class Customer
{
[PrimaryKey]
public int ID { get; set; }
[HasMany]
public IList<Note> Notes { get; set; }
}
[ActiveRecord]
public class Task
{
[PrimaryKey]
public int ID { get; set; }
[HasMany]
public IList<Note> Notes { get; set; }
}