every time use Add migration, ef wants to update all seeded data

[SEmadH]

Hi,
I`m using separate files for seeding data

for example i have file as BaseTablesSeedData.cs

 public class BaseTablesSeedData
    {
        public static void SeedData(ModelBuilder modelBuilder)
        {
var Cities = new List<City>() {
                new City { Id = 1, Code = "Abadan".ToPascalCase(), CountryId = 101, Name_EN = "Abadan".ToPascalCase(), Name_Local = "آبادان", TimeZone = "01" },
                new City { Id = 2, Code = "Abha".ToPascalCase(), CountryId = 184, Name_EN = "Abha".ToPascalCase(), Name_Local = "", TimeZone = "01" },
                new City { Id = 3, Code = "Abidjan".ToPascalCase(), CountryId = 42, Name_EN = "Abidjan".ToPascalCase(), Name_Local = "", TimeZone = "01" },
                new City { Id = 4, Code = "AbuDhabi".ToPascalCase(), CountryId = 2, Name_EN = "AbuDhabi".ToPascalCase(), Name_Local = "ابوظبي", TimeZone = "01" }


  modelBuilder.Entity<City>().HasData(Cities.ToArray());
}
}

onModelCreating :

 protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            //Base Tables Config
            BaseTablesSeedData.SeedData(modelBuilder);
}

every time I generate new migration all data wants to be update.

[ajcvickers]

This issue is lacking enough information for us to be able to fully understand what is happening. Please attach a small, runnable project or post a small, runnable code listing that reproduces what you are seeing so that we can investigate.

[ajcvickers]

Possible duplicate of #29985.