ASP.NET MVC4 プロジェクトに使用している Entity Framework は初めてです。外部キー関係を作成しようとしていますが、あまり成功していません。問題はシード データにある可能性があります。これを機能させるための以前の試みから再構築する方法がわかりません。
ここに私の2つのクラスがあります：
public class HardwareType
{
public int Id { get; set; }
[Required]
[StringLength(128)]
public string HType { get; set; }
public int HardwareId { get; set; }
public virtual Hardware Hardware { get; set; }
}
と
public class Hardware
{
public int Id { get; set; }
//public int HardwareId { get; set; }
...
public virtual ICollection<HardwareType> HardwareType { get; set; }
}
ここに私のサンプルシードデータがあります:
protected override void Seed(Context context)
{
var loc = new List<Location> {
new Location { LocationName = "Paradise Lane" },
new Location { LocationName = "81st Street" }
};
loc.ForEach(l => context.Locations.Add(l));
var type = new List<SoftwareType> {
new SoftwareType { SType = "Suite" }
};
type.ForEach(t => context.SoftwareTypes.Add(t));
var pub = new List<SoftwarePublisher> {
new SoftwarePublisher { Publisher = "Adobe" },
new SoftwarePublisher { Publisher = "Apple" },
new SoftwarePublisher { Publisher = "Microsoft" }
};
var soft = new List<Software> {
new Software { Title = "Adobe Creative Suite", Version = "CS6", SerialNumber = "1234634543", Platform = "Mac", Notes = "Macs rock!", PurchaseDate = "2012-12-04", Suite = true, SubscriptionEndDate = null, SeatCount = 0, Locations = loc.Where(s => s.LocationName == "Paradise Lane").ToArray(), Types = type.Where(s => s.SType == "Suite").ToArray(), Publishers = pub.Where(s => s.Publisher == "Adobe").ToArray() },
new Software { Title = "Microsoft Office", Version = "2012", SerialNumber = "34252345", Platform = "PC", Notes = "PCs stink!", PurchaseDate = "2012-11-04", Suite = true, SubscriptionEndDate = null, SeatCount = 0, Locations = loc.Where(s => s.LocationName == "81st Street").ToArray(), Types = type.Where(s => s.SType == "Suite").ToArray(), Publishers = pub.Where(s => s.Publisher == "Microsoft").ToArray() },
new Software { Title = "Apple iLife", Version = "2012", SerialNumber = "54675747564", Platform = "Mac", Notes = "Macs still rock!", PurchaseDate = "2012-12-04", Suite = true, SubscriptionEndDate = null, SeatCount = 0, Locations = loc.Where(s => s.LocationName == "Paradise Lane").ToArray(), Types = type.Where(s => s.SType == "Suite").ToArray(), Publishers = pub.Where(s => s.Publisher == "Apple").ToArray() }
};
soft.ForEach(s => context.Software.Add(s));
var manuf = new List<Manufacturer> {
new Manufacturer { ManufacturerName = "SonicWall" },
new Manufacturer { ManufacturerName = "Cisco" },
new Manufacturer { ManufacturerName = "Barracuda" },
new Manufacturer { ManufacturerName = "Dell" },
new Manufacturer { ManufacturerName = "HP" },
new Manufacturer { ManufacturerName = "Maxtor" },
new Manufacturer { ManufacturerName = "LaCie" },
new Manufacturer { ManufacturerName = "APC" },
new Manufacturer { ManufacturerName = "Intel" },
new Manufacturer { ManufacturerName = "D-Link" },
new Manufacturer { ManufacturerName = "Western Digital" },
new Manufacturer { ManufacturerName = "Quantum" },
new Manufacturer { ManufacturerName = "Seagate" },
new Manufacturer { ManufacturerName = "Apple" },
new Manufacturer { ManufacturerName = "Canon" },
};
var device = new List<DeviceType> {
new DeviceType { DType = "Network Device"},
new DeviceType { DType = "Other"}
};
var htype = new List<HardwareType> {
new HardwareType { HType = "PC" },
new HardwareType { HType = "Monitor" },
new HardwareType { HType = "Printer" },
new HardwareType { HType = "Miscellaneous" }
};
var hard = new List<Hardware> {
new Hardware { AssetTagId = "2134", Type = device.Where(h => h.DType == "Network Device").ToArray(), Manufacturer = manuf.Where(h => h.ManufacturerName == "SonicWall").ToArray(), ServiceTagId = "5243", SerialNumber = "3456", ProductNumber = "2345", PurchaseDate = "2012-10-23", WarrantyExpiration = "2012-11-12", WarrantyType = "NBD", Location = loc.Where(h => h.LocationName == "Paradise Lane").ToArray(), Notes = "Scrapped", HardwareType = htype.Where(h => h.HType == "Monitor").ToArray()},
new Hardware { AssetTagId = "2134", Type = device.Where(h => h.DType == "Network Device").ToArray(), Manufacturer = manuf.Where(h => h.ManufacturerName == "SonicWall").ToArray(), ServiceTagId = "5243", SerialNumber = "3456", ProductNumber = "2345", PurchaseDate = "2012-10-23", WarrantyExpiration = "2012-11-12", WarrantyType = "NBD", Location = loc.Where(h => h.LocationName == "Paradise Lane").ToArray(), Notes = "Scrapped", HardwareType = htype.Where(h => h.HType == "PC").ToArray() },
new Hardware { AssetTagId = "2134", Type = device.Where(h => h.DType == "Network Device").ToArray(), Manufacturer = manuf.Where(h => h.ManufacturerName == "SonicWall").ToArray(), ServiceTagId = "5243", SerialNumber = "3456", ProductNumber = "2345", PurchaseDate = "2012-10-23", WarrantyExpiration = "2012-11-12", WarrantyType = "NBD", Location = loc.Where(h => h.LocationName == "Paradise Lane").ToArray(), Notes = "Scrapped", HardwareType = htype.Where(h => h.HType == "PC").ToArray() }
};
hard.ForEach(h => context.Hardwares.Add(h));
base.Seed(context);
}
外部キー関係が機能するように、これをどのように構造化すればよいでしょうか。現在、次のエラーが表示されます。Unable to set field/property HardwareType on entity type CIT.Models.Hardware. See InnerException for details.
内部例外は次のとおりAn item cannot be removed from a fixed size Array of type 'CIT.Models.HardwareType[]'です。