Use Entity framework code first with nosql database

Entity Framework 4 Code First demonstrates how to declare a one-to-one connection (POCO)

Three methods:...A) Declare both classes with navigation properties to each other. Mark one of the tables (the dependent table) with the ForeignKey attribute on its Primary Key. EF infers 1-to-1 from this:...public class AppUser { public int Id { get; set; } public string Username { get; set; } public OpenIdInfo OpenIdInfo { get; set;...

code first entity framework 4.1 The permission to CREATE DATABASE was refused in the database'master.'

I just ran into this myself. The connection string name must match the class name of your DbContext subclass exactly. If it doesn't EF will not find the connection string and will try and fall back to doing something else (SQL embedded?) which doesn't work on my machine (I have full SQL Server installed).

Entity Framework Code First Using One column as Primary Key and another as Auto Increment Column

Apparently the ...answer... of @IronMan84 correct. But it didn't work for me. I slightly modified it to apply my another condition. And it worked. I did nothing else....This is my solution....public class Sale { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } [Key, Column(TypeName = "varchar"), MaxLeng...

Entity framework code first - how to run Update-Database for production database

To add on what @David said already... ...Personally, I don't trust ...automatic updates... in 'live' scenarios, and I always prefer manual database administration (i.e. there is a problem with ...permissions... needed to create or alter Db - not to mention shared hosting etc.) - but from what I've seen migrations are pretty solid when it comes to ...

Create one to one relationship by using entity framework database first

Just remove ...UserDetailID... from the ...UserDetail... table and make ...UserID... both primary key and a foreign key to the ...UserID... column of the ...User... table....This the correct way to make 1:1 relationships in a database and EF recognizes it and maps the entities appropriately with database-first approach.

Select distinct on one column only using Entity Framework Code First

You can use ...DistinctBy(m=> m.SentBy)

Entity Framework 6 One-Way relationship using Code First

You are getting an error because ...HeaderBackgroundColorId... is a non-nullable ...int..., so it cannot be optional....All you need to do to achieve what you're looking for is to turn the foreign key into a nullable ...int.........public int? HeaderBackgroundColorID { get; set; } ...Because you named the foreign key to match the navigation propert...

How to define a one to one self reference using Entity Framework Code First

public class Stuff { public int Id { get; set; } public int? NextVersionId { get; set; } public int? PrevVersionId { get; set; } public virtual Stuff NextVersion { get; set; } public virtual Stuff PrevVersion { get; set; } } ...Updated: ...modelBuilder.Entity<Stuff>().HasOptional(t => t.NextVersion).WithMany().HasForeignKey...

Create database using code first Entity Framework in SQL Server

Set your connection string in your constructor:...public class BreakAwayContext : DbContext { public BreakAwayContext() : base("MyConnectionString", throwIfV1Schema: false) { } ... ...Then set your connection string in web.config or app.config:...<connectionStrings> <add name="MyConnectionString" connectionString="Data Source...

One to many relationship with junction table using Entity Framework code first

Sorry to resurrect this thread, but I wanted to share a utility I created to handle a WebApi that had many instances of this same kind of relationship. We have multiple business objects which each have relationships to EventHistory, Messages, Files, etc, and it was messy keeping track of all the FluentAPI functions. Here's what I came up with:... ...