public void EFCore_Should_Support_Circular_References()
{
// Create new empty database
using (var db = new SQLiteContext())
{
// Arrange
var cr = new EntityFrameworkRepository <Category>(db, null, false);
var c = CreateCategory(100);
cr.Create(c);
cr.SaveChanges();
// Detach all to avoid expansions already cached in the context
cr.DetachAll();
// Act
var cdb = cr
.Include("Products.Parts.Product")
.Find().First();
Assert.NotNull(cdb);
var products = cdb.Products;
// Assert
Assert.NotNull(products);
Assert.Equal(100, products.Count);
var product = products.First();
for (int i = 0; i < 10; i++)
{
Assert.NotNull(product);
Assert.NotNull(product.Parts);
var part = product.Parts.First();
product = part.Product;
}
}
}
protected async Task IncludeTest(
string includes,
int productRows,
int expectedProductRows,
int expectedPartRows,
Func <IEntityFrameworkRepository <Category>, int?, Task <Category> > getById)
{
// Create new empty database
using (var db = new SQLiteContext())
{
// Arrange
IEntityFrameworkRepository <Category> categoryRepository = new EntityFrameworkRepository <Category>(db)
.Include(includes);
var category = CreateCategory(productRows);
categoryRepository.Create(category);
// Detach all to avoid expansions already cached in the context
categoryRepository.DetachAll();
// Act
category = await getById(categoryRepository, category.Id);
// Assert
Assert.NotNull(category);
if (category.Products == null)
{
Assert.Equal(0, expectedProductRows);
}
else
{
Assert.Equal(expectedProductRows, category.Products.Count);
var product = category.Products.First();
if (product.Parts == null)
{
Assert.Equal(0, expectedPartRows);
}
else
{
Assert.Equal(expectedPartRows, product.Parts.Count);
}
}
}
}
public void EFCore_Should_Not_Support_Lazy_Load()
{
// Create new empty database
using (var db = new SQLiteContext())
{
// Arrange
var cr = new EntityFrameworkRepository <Category>(db, null, false);
var c = CreateCategory(100);
cr.Create(c);
cr.SaveChanges();
// Detach all to avoid expansions already cached in the context
cr.DetachAll();
// Act
var cdb = cr.Find().First();
Assert.NotNull(cdb);
// Assert
// Looks like lazy loading is not supported in EF Core
Assert.Null(cdb.Products);
}
}
