private async Task <bool> UpdateLinks <TLink>(MigrationPostgreSqlContext cp,
IReadOnlyCollection <ToId> newArray
, DbSet <TLink> links,
Func <TLink, int> targetId,
Action <TLink, int> setResult)
where TLink : class
{
foreach (var link in links)
{
var toId =
newArray.FirstOrDefault(f => f.From == targetId(link));
if (toId != null && toId.From != toId.To)
{
setResult(link, toId.To);
}
}
await cp.SaveChangesAsync();
return(true);
}
public static void Migrate(this IServiceCollection services, string connectionString, bool dataMigration, IEnumerable <IMigrationDataUpdate> additionalMigrations)
{
if (string.IsNullOrWhiteSpace(connectionString))
{
throw new InvalidOperationException("_connectionString is null or empty");
}
var dbContextOptions = new DbContextOptionsBuilder <MigrationPostgreSqlContext>();
dbContextOptions.UseNpgsql(connectionString,
b => b.MigrationsAssembly(typeof(MigrationProviderExtensions)
.Assembly.GetName()
.Name)
.MigrationsHistoryTable("__MyMigrationsHistory", schema: "migration"));
using (MigrationPostgreSqlContext myDbContext = new MigrationPostgreSqlContext(dbContextOptions.Options))
{
myDbContext.Migrate(new Configuration(additionalMigrations)
{
AutomaticDataMigrationsEnabled = dataMigration
});
}
}
