我有一個名爲ACCOUNT的表,其中包含account_id,position_id和更多列。另一個表我有PositionCombination,它由colons position_id和幾個組成。使用jpa刪除數據庫中的行
這是帳戶類我有
@RooJavaBean
@RooToString
@RooJpaActiveRecord
@RooJpaEntity
public class Account {
@OneToMany(mappedBy="account", fetch=FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval=true)
List<PositionCombination> allPositions = new ArrayList<PositionCombination>();
@OneToMany(mappedBy="account", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<Message> messages = new ArrayList<Message>();
/*@OneToMany(mappedBy="account", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<PremiumPlayPositionCombination> premiumPlayPosition = new ArrayList<PremiumPlayPositionCombination>();*/
@OneToMany(mappedBy="account", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<PositionCombinationArc> allPositionsArc = new ArrayList<PositionCombinationArc>();
@ManyToOne
@JoinColumn(name="user_id")
private Userr user;
public List<PositionCombination> getOrders() {
return null;
}
public List<PositionCombination> getPositions() {
return null;
}
}
這是PositionCombinatin類
package com.uforic.optionstrader.domain;
@RooJavaBean
@RooToString
@RooJpaEntity
@RooJpaActiveRecord(finders = { "findPositionCombinationsByOrderStatus", "findPositionCombinationsByAccount", "findPositionCombinationsByStrategyType" })
public class PositionCombination {
private int positionType;
/*
* Strategy type = 1 - Short Term Exit
* 2 - Calendar Exit
* 3 - Intraday Exit
* Currently undefined for normal exit
*/
@ManyToOne
@JoinColumn(name = "strategy_id")
private Strategy strategy;
@OneToMany(mappedBy = "positionCombination", targetEntity = AbstractPosition.class, cascade = CascadeType.ALL, orphanRemoval = true, fetch=FetchType.EAGER)
private List<AbstractPosition> positions = new ArrayList<AbstractPosition>();
@ManyToOne
@JoinColumn(name = "account_id")
private Account account;
@NotNull
int orderStatus;
/* 1 - Short term Exit
* 2 - Calendar Exit
*/
int strategyType;
@OneToMany(mappedBy="positionCombination", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<StrategyExitReport> exitReports = new ArrayList<StrategyExitReport>();
@OneToMany(mappedBy="positionCombination", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<StrategyExitTracker> exitTrackers = new ArrayList<StrategyExitTracker>();
@OneToMany(mappedBy="positionCombination", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<IntradayExitDecision> intradayExitDecisions = new ArrayList<IntradayExitDecision>();
@OneToMany(mappedBy="positionCombination", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<ExitDecision> exitDecisions = new ArrayList<ExitDecision>();
@OneToMany(mappedBy="positionCombination", fetch=FetchType.LAZY, cascade = CascadeType.ALL)
List<Message> messages = new ArrayList<Message>();
public BigDecimal getTotalCostWithMarginPerContract() {
BigDecimal totalCostWithMargin = BigDecimal.ZERO;
for (AbstractPosition position : positions) {
totalCostWithMargin = totalCostWithMargin.add(position.getTotalCostPerContract().add(position.getMarginAmount()));
}
return totalCostWithMargin;
}
public BigDecimal getTotalCostWithMargin() {
BigDecimal totalCostWithMargin = BigDecimal.ZERO;
for (AbstractPosition position : positions) {
totalCostWithMargin = totalCostWithMargin.add(position.getTotalCostWithMargin());
}
return totalCostWithMargin;
}
public static Integer deletePositions(long accid) {
return new PositionCombination().deletePositionCombinationByAccount(accid);
}
@Transactional
private Integer deletePositionCombinationByAccount(Long accountid) {
System.out.println("acc id :" + accountid);
EntityManager em = PositionCombination.entityManager();
int result = em.createQuery("DELETE FROM PositionCombination o where o.account.id = :accountid").setParameter("accountid", accountid).executeUpdate();
return result;
}
public static TypedQuery<PositionCombination> findPositionCombinationsByStrategyTypes(List strategyTypes) {
EntityManager em = PositionCombination.entityManager();
TypedQuery<PositionCombination> q = em.createQuery("SELECT o FROM PositionCombination AS o WHERE o.strategyType IN (:strategyTypes)", PositionCombination.class);
q.setParameter("strategyTypes", strategyTypes);
return q;
}
}
現在,當我運行此代碼。它從該特定帳戶的positionCombination表中刪除所有entereis。
public void createSquareOff(User user,Account acc)
{
List<PositionCombination> positionCombinationList = acc.getAllPositions();
positionCombinationList.clear();
acc.persist();
}
但是,當我將代碼更改爲此。它不會從PositionCombination表中刪除行。在這裏,我只做了一些小的改動,而不是通過創建AllPositions來獲取position_id基礎上的數據庫中的特定位置並存儲到positionCombinationList中。
public void createSquareOff(User user,Account acc,PositionCombination posComb)
{
List<PositionCombination> positionCombinationList = PositionCombination.findPoscomByPoscombination(posComb);
positionCombinationList.clear();
acc.persist();
}
在第二個示例中,您調用persist仍然沒有改變內存中的對象。你期望會發生什麼? –
@AlanHay在清除之前,我將所有的數據保存到帳戶表中。但是這些代碼我沒有發佈。 –
投票結束。 –