EntityTypeBuilder does not contain a definition for ToTable in EF Core

Question

I have this sample code:

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Models;

namespace MySampleNamespace
{         


        

Answer 1

Porting from EF6 to EFCore, we had this issue. Our cause was .HasKey now returns a KeyBuilder and the .ToTable doesn't operate on it. So reversing that worked.

Ie. Was:

mp.HasKey(m => m.Id)
  .ToTable("Table")

Became:

mp.ToTable("Table")
  .HasKey(m => m.Id);

Answer 2

For net core 3.1, need to install these packages:

Microsoft.EntityFrameworkCore
Microsoft.EntityFrameworkCore.Relational

Answer 3

I had this problem, but did not need to install:

Microsoft.EntityFrameworkCore.Relational

I simply exited VS 2017 and re-opened my solution. I had the following NuGet packages installed:

Microsoft.EntityFrameworkCore
Microsoft.EntityFrameworkCore.Tools

And the following CLI Tool Reference:

Microsoft.EntityFrameworkCore.Tools.DotNet

Answer 4

Install

• Microsoft.EntityFrameworkCore,
• MicrosoftEntityFramworkCore.Tools, and finally
• Microsoft.EntityFrameworkCore.SqlServer

Answer 5

For me, my issue was that I trying to call ToView() incorrectly.

I was doing:

 modelBuilder.Query<Vendor>(entity =>
        {
            entity.Property(v => v.VendorId).HasColumnName("VendorID");
            entity.Property(v => v.Name).HasColumnName("Vendor Name");                
        }).ToView("vwVendors");

instead of:

modelBuilder.Query<Vendor>(entity =>
        {
            entity.ToView("vwVendors");
            entity.Property(v => v.VendorId).HasColumnName("VendorID");
            entity.Property(v => v.Name).HasColumnName("Vendor Name");                
        });

Answer 6

It's also possible you have version discrepancies in your solution, so for example, if one of the projects in your dependency chain has a 3.1 version of EF Core and another project has a 2.1, then you will also see this error, and no matter what you install it won't work, instead make sure they are the same version in the entire solution.