Setting table level WillCascadeOnDelete not available


I'm pulling out my hair here. I've seen the solutions to turning off cascade on delete here, but I can't implement it. I don't know what I'm doing wrong here, but I keep getting the below error:

'System.Data.Entity.ModelConfiguration.EntityTypeConfiguration' does not contain a definition for 'WillCascadeOnDelete' and no extension method 'WillCascadeOnDelete' accepting a first argument of type 'System.Data.Entity.ModelConfiguration.EntityTypeConfiguration' could be found (are you missing a using directive or an assembly reference?)

I've added the necessary namespaces, but I don't see it as an option anywhere in the intellisense and I'm not getting anywhere searching. I'm in VS 2010 MVC 3

using System; using System.Collections.Generic; using System.Linq; using System.Web; using vf2.Models; using vf2.Models.LinkTables; using vf2.Models.Requests; using System.Data.Entity; using System.Data.Entity.ModelConfiguration.Conventions; using System.Data.Entity.ModelConfiguration.Configuration; using System.Data.Entity.ModelConfiguration; using vf2.Models.Reporting; using vf2.Models.POSObj; namespace vf2.Models { public class vfContext : DbContext { public DbSet<App> Apps { get; set; } public DbSet<Origin> Origins { get; set; } public DbSet<WineType> WineTypes { get; set; } public DbSet<VarType> VarTypes { get; set; } public DbSet<Wine> Wines { get; set; } public DbSet<Vintage> Vintages { get; set; } public DbSet<Distributor> Distributors { get; set; } public DbSet<Importer> Importers { get; set; } public DbSet<Producer> Producers { get; set; } public DbSet<Publication> Publications { get; set; } public DbSet<Review> Reviews { get; set; } public DbSet<UserType> UserTypes { get; set; } public DbSet<Restaurant> Restaurants { get; set; } public DbSet<WineListChangeRate> WineListChangeRates { get; set; } public DbSet<MenuChangeRate> MenuChangeRates { get; set; } public DbSet<WineListCount> WineListCounts { get; set; } public DbSet<UserObj> UserObjs { get; set; } public DbSet<ProducerUser> ProducerUsers { get; set; } public DbSet<DistributorUser> DistributorUsers { get; set; } public DbSet<RestaurantUser> RestaurantUsers { get; set; } public DbSet<ProducerEditRequest> ProducerEditRequests { get; set; } public DbSet<RequestStatus> RequestStatuses { get; set; } public DbSet<VOAVIRequest> VOAVIRequests { get; set; } public DbSet<POS> POSs { get; set; } public DbSet<Cart> Carts { get; set; } public DbSet<FutureUser> FutureUsers { get; set; } public DbSet<Doc> Docs { get; set; } public DbSet<DocType> DocTypes { get; set; } public DbSet<WineVisit> WineVisits { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Entity<Review>().WillCascadeOnDelete(false); //error here! base.OnModelCreating(modelBuilder); } } }


"Cascading delete" is a configuration of a relationship, not of an entity/table. Hence WillCascadeOnDelete is a method of CascadableNavigationPropertyConfiguration. Use case example:

modelBuilder.Entity<Review>() .HasRequired(r => r.Wine) .WithMany() .WillCascadeOnDelete(false);

It means that if a wine is deleted from the catalog in the database, it's reviews should not be deleted together with the wine. That's a property of this specific relationship, not of the Reviews table.

In this case trying to delete a wine which has reviews would result in a foreign key constraint violation and exception of course, but that is what you usually want when you disable cascading delete on a required relationship ("Don't allow to delete a wine which has reviews, only allow it for wines which haven't any...").


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