Dynamically changing schema in Entity Framework Core

Question

UPD here is the way I solved the problem. Although it\'s likely to be not the best one, it worked for me.

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I have an issue with working with EF

Answer 1

I find this blog might be useful for you. Perfect !:)

https://romiller.com/2011/05/23/ef-4-1-multi-tenant-with-code-first/

This blog is based on ef4, I'm not sure whether it will work fine with ef core.

public class ContactContext : DbContext
{
    private ContactContext(DbConnection connection, DbCompiledModel model)
        : base(connection, model, contextOwnsConnection: false)
    { }

    public DbSet People { get; set; }
    public DbSet ContactInfo { get; set; }

    private static ConcurrentDictionary, DbCompiledModel> modelCache
        = new ConcurrentDictionary, DbCompiledModel>();

    /// 

    /// Creates a context that will access the specified tenant
    /// 
    public static ContactContext Create(string tenantSchema, DbConnection connection)
    {
        var compiledModel = modelCache.GetOrAdd(
            Tuple.Create(connection.ConnectionString, tenantSchema),
            t =>
            {
                var builder = new DbModelBuilder();
                builder.Conventions.Remove();
                builder.Entity().ToTable("Person", tenantSchema);
                builder.Entity().ToTable("ContactInfo", tenantSchema);

                var model = builder.Build(connection);
                return model.Compile();
            });

        return new ContactContext(connection, compiledModel);
    }

    /// 

    /// Creates the database and/or tables for a new tenant
    /// 
    public static void ProvisionTenant(string tenantSchema, DbConnection connection)
    {
        using (var ctx = Create(tenantSchema, connection))
        {
            if (!ctx.Database.Exists())
            {
                ctx.Database.Create();
            }
            else
            {
                var createScript = ((IObjectContextAdapter)ctx).ObjectContext.CreateDatabaseScript();
                ctx.Database.ExecuteSqlCommand(createScript);
            }
        }
    }
}

The main idea of these codes is to provide a static method to create different DbContext by different schema and cache them with certain identifiers.