public static Task SeedData(this WebsitesContext context)
{
return(Task.Run(() =>
{
if (context.Database.IsSqlServer())
{
context.Database.EnsureCreated(); // For MSSQL only
}
if (context.Websites.Any())
{
//To truncate tables and reseed the identities -- only required few times and not always
context.Websites.RemoveRange(context.Websites);
context.SaveChanges();
if (context.Database.IsSqlServer()) // For MSSQL only
{
context.Database.ExecuteSqlCommand("DBCC CHECKIDENT('Websites', RESEED, 0)");
context.Database.ExecuteSqlCommand("DBCC CHECKIDENT('WebsiteDetails', RESEED, 0)");
}
}
if (!context.Websites.Any())
{
context.Websites.AddRange(getWebsites().GetAwaiter().GetResult());
context.SaveChanges();
}
if (!context.WebsiteDetails.Any())
{
context.WebsiteDetails.AddRange(getWebsiteDetails(context).GetAwaiter().GetResult());
context.SaveChanges();
}
}));
}
public static Task <List <WebsiteDetail> > getWebsiteDetails(WebsitesContext context) =>
Task.Run(() => context.Websites
.ToList <Website>()
.Select((website, index) =>
Enumerable.Range(-15, 30)
.Select((number, enuIndex) => new WebsiteDetail {
WebsiteId = website.WebsiteId, VisitDate = DateTime.Now.AddDays(number), TotalVisits = (index + 1) * (enuIndex + 1) * 100, Website = website
})
.ToList <WebsiteDetail>()
)
.SelectMany(websiteDetails => websiteDetails)
.ToList <WebsiteDetail>()
);