private static void PrepareDb(StudentDbContext ctx)
{
ctx.Database.EnsureDeleted();
ctx.Database.EnsureCreated();
}
private static void SeedData(StudentDbContext context)
{
//students
Console.WriteLine("Adding students..");
const int totalStudents = 25;
const int totalCourses = 10;
var currentDate = DateTime.Now;
for (int i = 0; i < totalStudents; i++)
{
context.Students.Add(new Student
{
Name = $"Student {i}",
RegistrationDate = currentDate.AddDays(i),
Birthday = currentDate.AddYears(-20).AddDays(i),
PhoneNumber = $"Random Phone {i}"
});
}
context.SaveChanges();
//courses
var addedCourses = new List <Course>();
for (int i = 0; i < totalCourses; i++)
{
var course = new Course
{
Name = $"Course {i}",
Description = $" Course Details {i}",
Price = 100 * i,
StartDate = currentDate.AddDays(i),
EndDate = currentDate.AddDays(20 + i)
};
addedCourses.Add(course);
context.Courses.Add(course);
}
context.SaveChanges();
// Students in courses
var studentsIds = context
.Students
.Select(s => s.Id)
.ToList();
for (int i = 0; i < totalCourses; i++)
{
var currentCourse = addedCourses[i];
var studentsInCourse = random.Next(2, totalStudents / 2);
for (int j = 0; j < studentsInCourse; j++)
{
var studentId = studentsIds[random.Next(0, studentsIds.Count)];
if (!currentCourse.Students.Any(s => s.StudentId == studentId))
{
currentCourse.Students.Add(new StudentsCourses
{
StudentId = studentId
});
}
else
{
j--;
}
}
var resourcesInCourse = random.Next(2, 20);
var types = new[] { 0, 1, 2, 999 };
for (int j = 0; j < resourcesInCourse; j++)
{
currentCourse.Resources.Add(new Resource
{
Name = $"Resource {i} {j}",
Url = $"URL{i} {j}",
ResourceType = (TypeOfResource)types[random.Next(0, types.Length)],
});
}
}
context.SaveChanges();
// Homeworks
for (int i = 0; i < totalCourses; i++)
{
var currentCourse = addedCourses[i];
var studentsInCourseIds = currentCourse
.Students
.Select(s => s.StudentId)
.ToList();
for (int j = 0; j < studentsInCourseIds.Count; j++)
{
var totalHomework = random.Next(2, 5);
for (int k = 0; k < totalHomework; k++)
{
context.Homeworks.Add(new Homework
{
Content = $"Content Homework {i}",
SubmissionDate = currentDate.AddDays(-i),
ContentType = ContentType.Zip,
StudentId = studentsInCourseIds[j],
CourseId = currentCourse.Id
});
}
}
context.SaveChanges();
}
}
