entity-framework-6

This question is an exact duplicate of: Entity Framework database mapping relationships (Duplicate creation using Seed() method) 1 answer EDIT---- From here i tried assigning Id's in the seeding method and this was OK for Languages but not when i added Address to the customer and assign Id's as well to these addresses, than it created the dupes again... Both Address & Language are declared as DbSet<...> in my Context What i tried: Adding 1 Address (with Id) - add this to 1 customer => Creates a dupe Adding 1 language & 1 Address (with Id's) - add both to 1 customer => Creates a dupe Adding 1

I've used Entity Framework 6.x and I've produced my database by code-first approach. After creating db, I've decided to some changes in my db. for example I want to determine a range of value for Size property in my model. my model: public class Tag : Entity, ITag { /// <summary> /// Size can be 1, 2, 3 or 4 /// </summary> [Range(1, 4)] public virtual int Size { get; set; } [Required] [StringLength(25)] public virtual string Title { get; set; } [StringLength(256)] public virtual string Description { get; set; } public virtual bool IsActive { get; set; } public virtual ISet<ArticleTag>

I need to extend the Where method for IQueryable to something like this: .WhereEx("SomeProperty", "==", "value") I dont know if this is even possible, but i found this in SO : Unable to sort with property name in LINQ OrderBy I tried this answer and it seems quite interesting (Ziad's answer): using System.Linq; using System.Linq.Expressions; using System; namespace SomeNameSpace { public static class SomeExtensionClass { public static IQueryable<T> OrderByField<T>(this IQueryable<T> q, string SortField, bool Ascending) { var param = Expression.Parameter(typeof(T), "p"); var prop = Expression

I have a custom users table in my database and i want to create a one-to-one relationship with aspnetusers table so that when i register a new customer, applicationuser class through UserManager should add the username, email, password and school code to the users table and add an fk in its own table. IS there any tutorial/example implementing this kind of scenario? I am trying to add a one-to-one relationship with my users table but the fk is different than pk Users Table [columns] username password school code userId [pk] ASPNETUsers Table [standard columns] Id, [pk] UserName, PasswordHash,

I am trying to make a new model using Entity Framework 6 and SQL Anywhere 17. I followed exactly these steps. http://dcx.sap.com/index.html#sqla170/en/html/37fb9e8558e94547b66156b9298be16f.html But when I go through Entity Data Model wizard, it disappears after the following screen. I got same Issue and able to resolve by following these step. Open server explorer tab- Delete all existing data connections- Rebuild your project- After this Entity Data Model wizard will not disappears. 来源： https://stackoverflow.com/questions/37178496/entity-data-model-wizard-disappears-sql-anywhere-17

Knowning Foo.Id and Bar.Id how can I create their relation without loading the entities from the DB. class Foo { public int Id { get; set; } public Lst<Bar> Bars { get; set; } } class Bar { public int Id { get; set; } public Lst<Foo> Foos { get; set; } } Also this configuration are disabled in DbContext constructor: Configuration.AutoDetectChangesEnabled = false; Configuration.ProxyCreationEnabled = false; Configuration.LazyLoadingEnabled = false; And how it is possible to remove the relationship? Example: using (var ctx = new DbCtx()) { ctx.Configuration.LazyLoadingEnabled = false; ctx