Scaffolding a database produces an Entity Framework model from an existing database. The resulting entities are created and mapped to the tables in the specified database. This feature was introduced in MySQL Connector/NET 6.10.2-beta and 8.0.8-dmr; however, scaffolding is not supported with all versions of Connector/NET (see Table 8.2, “Supported versions of Entity Framework Core”).

NET Core with Entity Framework Core. For the database, I use a. Download and install Docker for Mac. In VisualStudio on Mac, just go to. Package Manager Console Commands for Migrations. Migration commands in Entity Framework Core can be executed using the Package Manager Console in Visual Studio. Open the Package Manager Console from menu Tools - NuGet Package Manger - Package Manager Console in Visual Studio to execute the following commands. Scaffold-DbContext Scaffolds.

The Design package for scaffolding a database is part of the main package in EF Core 2.0 (or later) and no longer separate. If you are upgrading from EF Core 1.1 to EF Core 2.0 or 2.1, you must remove the MySql.Data.EntityFrameworkCore.Design package manually.

NuGet packages have the ability to select the best target for a project, which means that NuGet will install the libraries related to that specific framework version.

There are two different ways to scaffold an existing database:

This section shows how to scaffold the sakila database using both approaches.

• Any implementation of .NET Standard (see https://dotnet.microsoft.com/platform/dotnet-standard#versions)

• Visual Studio 2017 version 15.7 (required for Using Package Manager Console in Visual Studio)

• MySQL Server 5.7

• sakila database sample (see https://dev.mysql.com/doc/sakila/en/)

When upgrading ASP.NET Core applications to a newer framework, be sure to use the appropriate EF Core version (see https://docs.microsoft.com/en-us/aspnet/core/migration/30-to-31?view=aspnetcore-3.1).

1. Initialize a valid .NET Core project and console application using the .NET Core command-line interface (CLI) and then change to the newly created folder (sakilaConsole).

2. Add the MySQL NuGet package for EF Core using the CLI. For example, use the following command to add the MySql.Data.EntityFrameworkCore v8.0.20 package:

   The version (for example, --version 8.0.20) must match the actual Connector/NET version you are using. For current version information, see Table 8.2, “Supported versions of Entity Framework Core”.

3. Add the following Microsoft.EntityFrameworkCore.Design Nuget package:

4. EF Core 2.0 only: Add a reference to Microsoft.EntityFrameworkCore.Tools.DotNet as a DotNetCliToolReference entry in the sakilaConsole.csproj file as follows:

   The .NET tools are included in the .NET Core 2.1 SDK (and later) and are not required or supported for EF Core 2.1. If this is an upgrade, remove the following reference to that package from the .csproj file (version 2.0.3 in this example) :

5. Restore dependencies and project-specific tools that are specified in the project file as follows: Silent installation of firefox esr 52.8.1 for mac download.

6. Create the Entity Framework Core model by executing the following command (adjust the connection-string values to match your settings for the user= and password= options):

   To validate that the model has been created, open the new sakila folder. You should see files corresponding to all tables mapped to entities. In addition, look for the sakilaContext.cs file, which contains the DbContext for this database.

1. Open Visual Studio and create a new Console App (.NET Core) for C#.

2. Add the MySQL NuGet package for EF Core using the Package Manager Console. For example, use the following command to add the MySql.Data.EntityFrameworkCore v8.0.20 package:

   The version (for example, -Version 8.0.20) must match the actual Connector/NET version you are using. For current version information, see Table 8.2, “Supported versions of Entity Framework Core”.

3. Install the following NuGet packages by selecting either Package Manager Console or Manage NuGet Packages for Solution from the Tools and then NuGet Package Manager menu:

   • Microsoft.EntityFrameworkCore.Design

   • Microsoft.EntityFrameworkCore.Tools version 2.0.3 (for EF Core 2.0)

     The .NET tools are included in the .NET Core 2.1 SDK (and later) and are not required or supported for EF Core 2.1. If this is an upgrade, remove the reference to that package from the .csproj file (version 2.0.3 in this example) :

4. Open Package Manager Console and enter the following command at the prompt to create the entities and DbContext for the sakila database (adjust the connection-string values to match your settings for the user= and password= options):

   Visual Studio creates a new sakila folder inside the project, which contains all the tables mapped to entities and the sakilaContext.cs file.

It is possible to specify the exact tables in a schema to use when scaffolding database and to omit the rest. The command-line examples that follow show the parameters needed for filtering tables.

.NET Core CLI:

Package Manager Console in Visual Studio:

When scaffolding a database, you can use more than one schema or database. Note that the account used to connect to the MySQL server must have access to each schema to be included within the context. Multiple-schema functionality was introduced in Connector/NET 6.10.3-rc and 8.0.9-dmr releases.

The following command-line examples show how to incorporate the sakila and world schemas within a single context.

.NET Core CLI:

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Package Manager Console in Visual Studio:

Note for triage: I was able to reproduce this. Netcoreapp3.0trueallruntime; build; native; contentfiles; analyzers; buildtransitive. Netcoreapp3.0allruntime; build; native; contentfiles; analyzers; buildtransitiveallruntime; build; native; contentfiles; analyzers; buildtransitive. Note for triage: I was able to reproduce this. Here is my version 4 project that gives me the same errors listed in this feed. No suprises of course.Here is my version 5 project that has build errors (listed below).Here are the errors:SeverityCodeDescriptionProjectFileLineSuppression StateErrorNU1605Detected package downgrade: Microsoft.NETCore.Platforms from 3.0.0-preview5.19224.8 to 3.0.0-preview4.19212.13.

Reference the package directly from the project to select a different version.TestEF8 - Microsoft.EntityFrameworkCore.SqlServer 3.0.0-preview5.19227.1 - System.Data.SqlClient 4.7.0-preview5.19224.8 - System.Text.Encoding.CodePages 4.6.0-preview5.19224.8 - Microsoft.NETCore.Platforms (= 3.0.0-preview5.19224.8)TestEF8 - Microsoft.NETCore.Platforms (= 3.0.0-preview4.19212.13)TestEF8C:UsersjbrownsourcereposTestEF8TestEF8TestEF8.csproj1ErrorNU1605Detected package downgrade: Microsoft.NETCore.Platforms from 3.0.0-preview5.19224.8 to 3.0.0-preview4.19212.13. Reference the package directly from the project to select a different version.TestEF8 - Microsoft.EntityFrameworkCore.SqlServer 3.0.0-preview5.19227.1 - System.Data.SqlClient 4.7.0-preview5.19224.8 - Microsoft.Win32.Registry 4.6.0-preview5.19224.8 - System.Security.AccessControl 4.6.0-preview5.19224.8 - Microsoft.NETCore.Platforms (= 3.0.0-preview5.19224.8)TestEF8 - Microsoft.NETCore.Platforms (= 3.0.0-preview4.19212.13)TestEF8C:UsersjbrownsourcereposTestEF8TestEF8TestEF8.csproj1. I've done that. That's the first route I took. It dies on installing the Microsoft.EntityFrameworkCore.SqlServer. That one gives the same error. But I can try again.

Test coming up. Haha:) Thanks to all who looked at it.I have no doubt it is just some wrong step I take. Is there anyone out there that has preview5 working from a scratch project that does scaffolding of an existing db? Did you use package manager to install, the manager console and install commands, or did you simply add PackageReferences in the project file? Any ideas would help.:).