public void DeleteAggregateChildFromAggregateRootAndDatabase()
{
DatabaseContext ctx = new DatabaseContext();
Employee supervisorEmployee = ctx.EmployeeRepository.Find(1);
Employee subordinateEmployee = supervisorEmployee.Subordinates.Find(e => e.Id == 3);
/***********************************
* If the foreign key was non-nullable, the following error will occur when the following line of code is executed:
* The relationship could not be changed because one or more of the foreign-key properties is non-nullable.
* When a change is made to a relationship, the related foreign-key property is set to a null value.
* If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted.
*
* NEED TO CHECK: For a composite child key, the corresponding row will be physically deleted!?
*************************************/
//supervisorEmployee.Subordinates.Remove(subordinateEmployee);
ctx.Entry(subordinateEmployee).State = EntityState.Deleted;
ctx.SaveChanges();
int actualCount = (from e in ctx.EmployeeRepository select e).ToList().Count;
Assert.AreEqual(13, actualCount);
Assert.AreEqual(9, supervisorEmployee.Subordinates.Count);
}
public void InsertAggregateChildToNewAggregateRootObject()
{
Employee supervisorEmployee = TestDataHelper.CreateEmployeeWithValidData();
Employee subordinateEmployee = TestDataHelper.CreateEmployeeWithValidData();
supervisorEmployee.Subordinates = new List<Employee>();
supervisorEmployee.Subordinates.Add(subordinateEmployee); //marking to add to database
DatabaseContext ctx = new DatabaseContext();
ctx.Entry(supervisorEmployee).State = EntityState.Added;
ctx.SaveChanges();
int actualCount = (from e in ctx.EmployeeRepository select e).ToList().Count;
Assert.AreEqual(16, actualCount);
supervisorEmployee = ctx.EmployeeRepository.Find(15);
Assert.AreEqual(1, supervisorEmployee.Subordinates.Count);
}
public void DeleteAggregateRootWithAllAggregateChild()
{
TestInitialize();
DatabaseContext ctx = new DatabaseContext();
Employee supervisorEmployee = ctx.EmployeeRepository.Find(1);
List<Employee> subordinates = (
from employee in
ctx.EmployeeRepository
where employee.ReportsTo == 1
select employee
).ToList();
foreach (Employee sub in subordinates)
ctx.EmployeeRepository.Remove(sub);
ctx.Entry(supervisorEmployee).State = EntityState.Deleted;
ctx.SaveChanges();
int actualCount = (from e in ctx.EmployeeRepository select e).ToList().Count;
Assert.Equal(3, actualCount);
}
