DenLilleMand DenLilleMand - 1 year ago 242
MySQL Question

Cannot find the UseMysql method on DbContextOptions

I am playing around with the dotnet core on linux, and i am trying to configure my DbContext with a connection string to a mysql Server.

my DbContext looks like so:

using Microsoft.EntityFrameworkCore;
using Models.Entities;

namespace Models {
public class SomeContext : DbContext
//alot of dbSets...
public DbSet<SomeEntity> SomeDbSet { get; set; }

public EsportshubContext(DbContextOptions<SomeContext> options) : base(options) {


protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
optionsBuilder.UseMysql //Cannot find this method

protected override void OnModelCreating(ModelBuilder modelBuilder)
//using modelBuilder to map some relationships

My dependencies looks like so:

"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.0",
"type": "platform"
"Microsoft.AspNetCore.Diagnostics": "1.0.0",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
"Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
"Microsoft.Extensions.Configuration.Json": "1.0.0",
"Microsoft.Extensions.Configuration.CommandLine": "1.0.0",
"Microsoft.EntityFrameworkCore": "1.0.1",
"MySql.Data.Core": "7.0.4-ir-191",
"MySql.Data.EntityFrameworkCore": "7.0.4-ir-191"

I also tried to use the mysql server in my Startup.cs in the following code

public class Startup

public void ConfigureServices(IServiceCollection services)
var connection = @"Server=(localdb)\mssqllocaldb;Database=EFGetStarted.AspNetCore.NewDb;Trusted_Connection=True;";
services.AddDbContext<EsportshubContext>(options => options.UseMysql); //Cannot find UseMysql*

I tried to change my directive from

using Microsoft.EntityFrameworkCore;


using MySQL.Data.EntityFrameworkCore;

Which makes sense? maybe? but then all of the references to DbContext and DbSet is gone, so i suppose the solution is a mix of sorts??

Answer Source

You need

using Microsoft.EntityFrameworkCore;
using MySQL.Data.EntityFrameworkCore.Extensions;

Oracle is not complying to the standard practices when using Dependency Injection, so its all a bit different. The standard practice is to put the extension methods for Depedency Injection into Microsoft.Extensions.DependencyInjection namespace, which is included in most ASP.NET Core app projects so the method becomes automatically available when a package is imported.