Entity framework ef核心导航属性无法加载
我的应用程序是Ef core 2.2,未启用延迟加载 在MapAddress方法中,address对象的Country对象为null,尽管我有 包括(a=>a.Address)。然后包括(a=>a.Country) 热切地装载国家Entity framework ef核心导航属性无法加载,entity-framework,.net-core,linq-to-entities,ef-core-2.2,navigation-properties,Entity Framework,.net Core,Linq To Entities,Ef Core 2.2,Navigation Properties,我的应用程序是Ef core 2.2,未启用延迟加载 在MapAddress方法中,address对象的Country对象为null,尽管我有 包括(a=>a.Address)。然后包括(a=>a.Country) 热切地装载国家 var agentWalletResponse = (from wd in dbContext.WalletDetail.Where(w => w.WalletDetailId == agentWalletDetailId)
var agentWalletResponse = (from wd in dbContext.WalletDetail.Where(w => w.WalletDetailId == agentWalletDetailId)
join c in dbContext.CorporateInfo.Include(a => a.Address).ThenInclude(a => a.Country).Where(d => !d.IsDeleted) on wd.WalletSubscriptionId equals c.OwnerUserId
select new AgentWalletResponse()
{
Address = MapAddress(c.Address),
Balance = wd.AvailableBalance,
CreatedOn = wd.CreatedOn
}).FirstOrDefault();
地图地址
protected AddressModel MapAddress(Address address)
{
if (address == null)
return null;
return new AddressModel
{
AddressId = address.AddressId,
AddressLine = address.AddressLine1,
City = address.City,
Country = address.Country?.Name,
Province = address.Province,
Division = address.Division,
PhoneNumber = address.PhoneNumber,
PostalCode = address.PostalCode
};
}
更改“然后包含”表达式 在dbContext.CorporateInfo.Include(a=>a.Address)中加入c,然后使用Include(a=>a.Address.Country).使用这个
var agentWalletResponse=(来自dbContext.WalletDetail.Where(w=>w.WalletDetailId==agentwalletdetaild)中的wd)
在dbContext.CorporateInfo.Include(a=>a.Address)中加入c,然后加入(a=>a.Country)。其中wd.WalletSubscriptionId上的(d=>!d.IsDeleted)等于c.OwnerUserId
选择新代理AlletResponse()
{
地址=新的地址模型
{
AddressId=c.Address.AddressId,
AddressLine=c.Address.AddressLine1,
City=c.Address.City,
国家=c.地址.国家?.名称,
省,省,
分部=c.地址.分部,
PhoneNumber=c.Address.PhoneNumber,
PostalCode=c.Address.PostalCode
},
余额=wd.AvailableBalance,
CreatedOn=wd.CreatedOn
}).FirstOrDefault();
我通过引入另一种中间方法实现了这一点,该方法接受CorporateInfo而不是地址
var agentWalletResponse = (from wd in dbContext.WalletDetail
join ws in dbContext.WalletSubscription on wd.WalletSubscriptionId equals ws.WalletSubscriptionId
join ci in dbContext.CorporateInfo.Include(a => a.Address).ThenInclude(a => a.Country).Where(d => !d.IsDeleted) on wd.WalletSubscriptionId equals ci.OwnerUserId
join wc in dbContext.Currency on wd.CurrencyId equals wc.CurrencyId
join ac in dbContext.AgentCommission on ws.WalletSubscriptionId equals ac.WalletSubscriptionId into y
from agentComms in y.DefaultIfEmpty()
join kf in dbContext.KokuFee on ws.WalletSubscriptionId equals kf.WalletSubscriptionId into z
from kf_all in z.DefaultIfEmpty()
where ws.WalletType.Equals(WalletType.Agent) && !kf_all.IsDeleted && wd.WalletDetailId.Equals(agentWalletDetailId)
&& !agentComms.IsDeleted
select new AgentWalletResponse
{
Alias = ws.Alias,
Address = MapAddress(ci),
AgentSubscriptionId = ws.WalletSubscriptionId,
AgentWalletDetailId = wd.WalletDetailId,
SubscriptionNo = ws.SubscriptionNo,
Balance = wd.AvailableBalance,
CurrencyCode = wc.CurrencyCode,
Commission = agentComms == null ? 0 : agentComms.Commission,
TopupFee = kf_all == null ? 0 : kf_all.AbsoluteFee,
CreatedOn = wd.CreatedOn
}).FirstOrDefault();
我的想法是,当我在投影中请求C.Address时,它只是在查询生成时忽略我的thenclude命令 谢谢。但是包含意味着它已经在Address对象中了。
//When use directly ef core fails to load the country of the address.
protected AddressModel MapAddress(CorporateInfo corporateInfo)
{
return MapAddress(corporateInfo.Address);
}