[英]How to find matching pair of data in NHibernate QueryOver?
我有兩個清單。
AccountNumbers ["account1", "account2", "account3"]
Descriptions [ "desc1", "" ] (possible should be empty value)
我有兩個數據庫表Account
和AccountDescriptionHistory
。 表與accountId
有關系。
帳戶表設計:- AccountId,AccountNumber,描述,
帳戶描述歷史記錄:- AccountId、描述、validTo、validFrom
現在,我想設計一個具有以下要求的查詢的Nhibernet 查詢。
Account
表應與AccountDescriptionHistory
連接,左連接與accountId
列。
應從傳遞的帳號列表中過濾accountnumbers
。
如果傳遞參數dateToCheck
大於和小於 accountdescriptionhistory 的validFrom
和validTo
列,則說明應與傳遞的descriptions
列表和accountdescriptionhistory
表中的accountdescriptionhistory
說明相匹配,否則,select 來自account
表。
考慮數據庫列中的空值和小寫值
我已嘗試使用以下查詢,但不知道如何從 collections 中過濾。
public IEnumerable<Account> CheckForExistingAccounts(ISession session, Owner owner, IEnumerable<string> accountNumbers,
IEnumerable<string> descriptions, bool isUpdating, DateTime? dateToCheck = null)
{
Account accountAlias = null;
AccountDescriptionHistory accountDescripAlias = null;
var existingaccountsquery = session.queryover(() => accountalias).
joinentityalias(() => accountdescripalias, () => accountdescripalias.account.id == accountalias.id, jointype.leftouterjoin).
where(account => !account.isdeleted && account.owner.id == owner.id).
selectlist(list => list
.select(() => accountalias.id).withalias(() => accountalias.id)
.select(projections.conditional(expression.isnull(
projections.property(accountalias.accountnumber)),
projections.property(string.empty),
projections.property(string.empty))).withalias(() => accountalias.accountnumber)
.select(() => accountalias.changed).withalias(() => accountalias.changed)
.select(() => accountalias.created).withalias(() => accountalias.created)
.select(() => accountalias.sequencenumber).withalias(() => accountalias.sequencenumber)
.select(() => accountalias.accounttype).withalias(() => accountalias.accounttype)
.select(() => accountalias.parentaccount).withalias(() => accountalias.parentaccount)
.select(() => accountalias.coreaccountid).withalias(() => accountalias.coreaccountid)
.select(() => accountalias.sourceid).withalias(() => accountalias.sourceid)
.select(() => accountalias.description).withalias(() => accountalias.description)
).transformusing(new deeptransformer<account>()).future<account>();
var data = existingaccountsquery.List();
return data;
}
我為上述描述性問題或問題開發了查詢。 如果將來對其他開發人員有幫助,我會在這里發帖。
`var existingAccountsQuery = session.QueryOver(() => accountAlias)
.JoinEntityAlias(() => accountDescripAlias,
Restrictions.And
(
//And clause 1
Restrictions.EqProperty($"{nameof(accountAlias)}.{nameof(accountAlias.Id)}",
"accountDescripAlias.Account.Id"),
//And clause 2
Restrictions.And(
Restrictions.Le(
Projections.SqlFunction("date",
NHibernateUtil.Date,
Projections.Property(
$"{nameof(accountDescripAlias)}.{nameof(accountDescripAlias.ValidFrom)}"))
, dateToCheck),
Restrictions.Ge(
Projections.SqlFunction("date",
NHibernateUtil.Date,
Projections.Property(
$"{nameof(accountDescripAlias)}.{nameof(accountDescripAlias.ValidFrom)}"))
, dateToCheck)
)
),
JoinType.LeftOuterJoin)
.Where(() => !accountAlias.IsDeleted && accountAlias.Owner.Id == owner.Id)
.Where(() => accountAlias.AccountNumber == null || accountAlias.AccountNumber.Lower().IsIn(accountNumbers.ToArray()))
.Where(() =>
(
accountDescripAlias.AccountDescription != null &&
accountDescripAlias.ValidFrom <= dateToCheck && accountDescripAlias.ValidTo >= dateToCheck &&
accountDescripAlias.AccountDescription.Lower().IsIn(descriptions.ToArray())
) ||
(
accountDescripAlias.AccountDescription == null &&
accountAlias.Description != null &&
accountAlias.Description.Lower().IsIn(descriptions.ToArray())
) ||
(
accountDescripAlias.AccountDescription == null &&
accountAlias.Description == null
)
);`
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