Toggling ProxyCreation in EF7 under new configuration

Prevent EF from adding new child objects instead of just association when inserting new parent object?

When disconnected entities are reattached they are in Added state by default....You can change the state after attaching the exercise....public int CreateExercise(Exercise newExercise) { db.Exercises.Add(newExercise); // set all attached users to unchanged. db.ChangeTracker.Entries<User>().ToList().ForEach(p => p.State = EntityState.U...

EF7: DBContext configuration on ASP.NET 5 Web-API

The code should be the same as you linked in the sample app. You register the context in ...Startup.cs..., within ...ConfigureServices... method using the following code:...public void ConfigureServices(IServiceCollection services) { // Add EF services to the services container. services .AddEntityFramework(Configuration) .A...

Dependancy Injected DbContext is empty after populating DbContext created with new (EF7, ASP.NET 5, vnext)

I might be wrong, but my assumption is that when you create a new instance of ...DbContext... in code, you are using the parameterless constructor that sets underlying connection string to some default value. However, DI-injected ...DbContext... could be resolved using another constructor with different connection string passed in explicitly....Tha...

EF7 Beta 4 : AddEntityFramework dont accept argument (Configuration)

It looks like the tutorial you're following is using an older version of the EF7 framework. EntityFramework 7 beta 4 no longer accepts any parameters to ...AddEntityFramework.... It looks like beta 5 is still on this same track, too....I believe what you're looking for is this:...// Register Entity Framework services.AddEntityFramework() .AddSq...

Unable to generate an explicit migration - Entity Framework 6.1.3 with multiple Contexts / Configurations

I found the solution to this here: ...How do I enable EF migrations for multiple contexts to separate databases?...The part I was missing was in the answer by "bart s". The configuration files needed to have their own namespace which can be created by the Enable-Migrations -MigrationsDirectory parameter. In my situation it translates to (I have so...

AddDbContext was called with configuration, but the context type 'MyContext' only declares a parameterless constructor?

As the error said it if you configure your ...MyContext... through ...AddDbContext... then you need too add a constructor that receive a parameter of type ...DbContextOptions<MyContext>... into your ...MyContext... class like below...public MyContext(DbContextOptions<MyContext> options) : base(options) { } ...If you don't do that, ASP.Net Core ...

Entity Core 2.0 - OnConfiguring not working with Configuration.GetConnectionString("DefaultConnection")

Your ...appsettings.json... is wrong. ...It must look something like...{ "ConnectionStrings": { "DefaultConnection": "..." } } ...Because ..._configuration.GetConnectionString("DefaultConnection"))... is a shorthand for ..._configuration["ConnectionStrings:DefaultConnection"].... That's why ...optionsBuilder.UseSqlServer("Data Source=WIN10-...

New .Net Core 2 Site does not reconize Configuration.GetConnectionString

I am creating a new web site from an empty ASP.NET Core 2 template and following the ...Microsoft Entity Framework Tutorial... to help me get setup. At one point it has you add the code:...services.AddDbContext<SchoolContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"))); ...To the ...ConfigureServices...

DateTime.Now default value in entity configuration always sets the same DateTime in the database

Ok I figured out the issue....Because of the configuration:...builder.Property(x => x.EntityCreated).HasDefaultValue(DateTime.Now); ...When I created a migration, it was using the DateTime that was generated at the time of creating said migration. As a result, it made the default value for this field a static DateTime....To overcome this, I reverte...

CS0120 An object reference is required for the non-static field, method, or property 'Startup.Configuration'

The thing is that ...public IConfiguration Configuration { get; }... is not static but ...ConfigureServices... which tries to call it is. Just use ...public void ConfigureServices(IServiceCollection services)... (note the absence of static modifier).