[entity-framework] Entity Framework: "Store update, insert, or delete statement affected an unexpected number of rows (0)."

Recently, I'm trying upgrade EF5 to EF6 sample project . The table of sample project has decimal(5,2) type columns. Database migration successfully completed. But, initial data seed generated exception.

Model :

    public partial class Weather
    {
    ...
    public decimal TMax {get;set;}
    public decimal TMin {get;set;}
    ...
    }

Wrong Configuration :

public partial class WeatherMap : EntityTypeConfiguration<Weather>
{

    public WeatherMap()
    {
        ...
        this.Property(t => t.TMax).HasColumnName("TMax");
        this.Property(t => t.TMin).HasColumnName("TMin");
        ...
    }
}

Data :

    internal static Weather[] data = new Weather[365]
    {
      new Weather() {...,TMax = 3.30M,TMin = -12.00M,...},
      new Weather() {...,TMax = 5.20M,TMin = -10.00M,...},
      new Weather() {...,TMax = 3.20M,TMin = -8.00M,...},
      new Weather() {...,TMax = 11.00M,TMin = -7.00M,...},
      new Weather() {...,TMax = 9.00M,TMin = 0.00M,...},
    };

I found the problem, Seeding data has precision values, but configuration does not have precision and scale parameters. TMax and TMin fields defined with decimal(10,0) in sample table.

Correct Configuration :

public partial class WeatherMap : EntityTypeConfiguration<Weather>
{

    public WeatherMap()
    {
        ...
        this.Property(t => t.TMax).HasPrecision(5,2).HasColumnName("TMax");
        this.Property(t => t.TMin).HasPrecision(5,2).HasColumnName("TMin");
        ...
    }
}

My sample project run with: MySql 5.6.14, Devart.Data.MySql, MVC4, .Net 4.5.1, EF6.01

Best regards.