Map string to guid with Dapper

Question

I\'m using Dapper to hammer out some load testing tools that need to access a PostgreSQL database. This particular version of PostgreSQL does not support GUIDs natively, so

Answer 1

I'm using MySql but it has the same problem since I store the Guid as a string. To fix the mapping without having to alias the column i used the following:

public class MySqlGuidTypeHandler : SqlMapper.TypeHandler
{
    public override void SetValue(IDbDataParameter parameter, Guid guid)
    {
        parameter.Value = guid.ToString();
    }

    public override Guid Parse(object value)
    {
        return new Guid((string)value);
    }
}

And in my Startup.cs:

public void ConfigureServices(IServiceCollection services)
    {
        SqlMapper.AddTypeHandler(new MySqlGuidTypeHandler());
        SqlMapper.RemoveTypeMap(typeof(Guid));
        SqlMapper.RemoveTypeMap(typeof(Guid?));
    }