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Jpa 使用条件与仅创建查询时的不同结果集

jpa

Jpa 使用条件与仅创建查询时的不同结果集,jpa,eclipselink,javax.persistence,Jpa,Eclipselink,Javax.persistence,无标准查询的手动方法 /** * The persistent class for the third_party database table. * */ @Entity @Table(name="third_party") @NamedQuery(name="ThirdParty.findAll", query="SELECT t FROM ThirdParty t") public class ThirdParty implements Serial

无标准查询的手动方法

/**
 * The persistent class for the third_party database table.
 * 
 */
    @Entity
    @Table(name="third_party")
    @NamedQuery(name="ThirdParty.findAll", query="SELECT t FROM ThirdParty t")
    public class ThirdParty implements Serializable {
        private static final long serialVersionUID = 1L;

        @Id
        @GeneratedValue(strategy=GenerationType.IDENTITY)
        @Column(name="Id")
        private int id;

        private String address;

        private String contactNo;

        @Temporal(TemporalType.TIMESTAMP)
        private Date createdDate;

        private String email;

        private String name;

        //bi-directional many-to-one association to ThirdPartyHasOwner
        @OneToMany(mappedBy="thirdParty")
        private List<ThirdPartyHasOwner> thirdPartyHasOwners;

        //bi-directional many-to-one association to ThirdSeatAllocation
        @OneToMany(mappedBy="thirdParty")
        private List<ThirdSeatAllocation> thirdSeatAllocations;

        public ThirdParty() {
        }

        public int getId() {
            return this.id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getAddress() {
            return this.address;
        }

        public void setAddress(String address) {
            this.address = address;
        }

        public String getContactNo() {
            return this.contactNo;
        }

        public void setContactNo(String contactNo) {
            this.contactNo = contactNo;
        }

        public Date getCreatedDate() {
            return this.createdDate;
        }

        public void setCreatedDate(Date createdDate) {
            this.createdDate = createdDate;
        }

        public String getEmail() {
            return this.email;
        }

        public void setEmail(String email) {
            this.email = email;
        }

        public String getName() {
            return this.name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public List<ThirdPartyHasOwner> getThirdPartyHasOwners() {
            return this.thirdPartyHasOwners;
        }

        public void setThirdPartyHasOwners(List<ThirdPartyHasOwner> thirdPartyHasOwners) {
            this.thirdPartyHasOwners = thirdPartyHasOwners;
        }

        public ThirdPartyHasOwner addThirdPartyHasOwner(ThirdPartyHasOwner thirdPartyHasOwner) {
            getThirdPartyHasOwners().add(thirdPartyHasOwner);
            thirdPartyHasOwner.setThirdParty(this);

            return thirdPartyHasOwner;
        }

        public ThirdPartyHasOwner removeThirdPartyHasOwner(ThirdPartyHasOwner thirdPartyHasOwner) {
            getThirdPartyHasOwners().remove(thirdPartyHasOwner);
            thirdPartyHasOwner.setThirdParty(null);

            return thirdPartyHasOwner;
        }

        public List<ThirdSeatAllocation> getThirdSeatAllocations() {
            return this.thirdSeatAllocations;
        }

        public void setThirdSeatAllocations(List<ThirdSeatAllocation> thirdSeatAllocations) {
            this.thirdSeatAllocations = thirdSeatAllocations;
        }

        public ThirdSeatAllocation addThirdSeatAllocation(ThirdSeatAllocation thirdSeatAllocation) {
            getThirdSeatAllocations().add(thirdSeatAllocation);
            thirdSeatAllocation.setThirdParty(this);

            return thirdSeatAllocation;
        }

        public ThirdSeatAllocation removeThirdSeatAllocation(ThirdSeatAllocation thirdSeatAllocation) {
            getThirdSeatAllocations().remove(thirdSeatAllocation);
            thirdSeatAllocation.setThirdParty(null);

            return thirdSeatAllocation;
        }

    }
我使用这段代码获得了一个结果集，该结果集通过使用一个左连接和另一个表ThirdPartyHasOwner（它有两个主键，并且本身是一个外键）来包含第三方。现在，下面的代码检索正确的结果数据集

Query query = emManager.createQuery("SELECT c FROM ThirdParty c LEFT JOIN ThirdPartyHasOwner b ON  b.id.third_party_Id = c.id WHERE b.id.ownerId=1");
List<ThirdParty> thirdParties = query.getResultList();
（结果变量的数据错误，这是使用条件查询的结果，第三方变量的数据集正确，这是手动方法的结果）

最后但并非最不重要的一点是，我使用的是eclipselink的
javax.persistence.persistence api

第三方模型类

/**
 * The persistent class for the third_party database table.
 * 
 */
    @Entity
    @Table(name="third_party")
    @NamedQuery(name="ThirdParty.findAll", query="SELECT t FROM ThirdParty t")
    public class ThirdParty implements Serializable {
        private static final long serialVersionUID = 1L;

        @Id
        @GeneratedValue(strategy=GenerationType.IDENTITY)
        @Column(name="Id")
        private int id;

        private String address;

        private String contactNo;

        @Temporal(TemporalType.TIMESTAMP)
        private Date createdDate;

        private String email;

        private String name;

        //bi-directional many-to-one association to ThirdPartyHasOwner
        @OneToMany(mappedBy="thirdParty")
        private List<ThirdPartyHasOwner> thirdPartyHasOwners;

        //bi-directional many-to-one association to ThirdSeatAllocation
        @OneToMany(mappedBy="thirdParty")
        private List<ThirdSeatAllocation> thirdSeatAllocations;

        public ThirdParty() {
        }

        public int getId() {
            return this.id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getAddress() {
            return this.address;
        }

        public void setAddress(String address) {
            this.address = address;
        }

        public String getContactNo() {
            return this.contactNo;
        }

        public void setContactNo(String contactNo) {
            this.contactNo = contactNo;
        }

        public Date getCreatedDate() {
            return this.createdDate;
        }

        public void setCreatedDate(Date createdDate) {
            this.createdDate = createdDate;
        }

        public String getEmail() {
            return this.email;
        }

        public void setEmail(String email) {
            this.email = email;
        }

        public String getName() {
            return this.name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public List<ThirdPartyHasOwner> getThirdPartyHasOwners() {
            return this.thirdPartyHasOwners;
        }

        public void setThirdPartyHasOwners(List<ThirdPartyHasOwner> thirdPartyHasOwners) {
            this.thirdPartyHasOwners = thirdPartyHasOwners;
        }

        public ThirdPartyHasOwner addThirdPartyHasOwner(ThirdPartyHasOwner thirdPartyHasOwner) {
            getThirdPartyHasOwners().add(thirdPartyHasOwner);
            thirdPartyHasOwner.setThirdParty(this);

            return thirdPartyHasOwner;
        }

        public ThirdPartyHasOwner removeThirdPartyHasOwner(ThirdPartyHasOwner thirdPartyHasOwner) {
            getThirdPartyHasOwners().remove(thirdPartyHasOwner);
            thirdPartyHasOwner.setThirdParty(null);

            return thirdPartyHasOwner;
        }

        public List<ThirdSeatAllocation> getThirdSeatAllocations() {
            return this.thirdSeatAllocations;
        }

        public void setThirdSeatAllocations(List<ThirdSeatAllocation> thirdSeatAllocations) {
            this.thirdSeatAllocations = thirdSeatAllocations;
        }

        public ThirdSeatAllocation addThirdSeatAllocation(ThirdSeatAllocation thirdSeatAllocation) {
            getThirdSeatAllocations().add(thirdSeatAllocation);
            thirdSeatAllocation.setThirdParty(this);

            return thirdSeatAllocation;
        }

        public ThirdSeatAllocation removeThirdSeatAllocation(ThirdSeatAllocation thirdSeatAllocation) {
            getThirdSeatAllocations().remove(thirdSeatAllocation);
            thirdSeatAllocation.setThirdParty(null);

            return thirdSeatAllocation;
        }

    }
那么，我是否对条件查询做了一些错误，或者它是某种奇怪的错误？

尽管日志很好，但我还是使用了不同的方法，给出了不同的数据集

代码之前

CriteriaBuilder cb = emManager.getCriteriaBuilder();
CriteriaQuery<ThirdParty> cq = cb.createQuery(ThirdParty.class);
Root<ThirdParty> a = cq.from(ThirdParty.class);
Join<ThirdParty, ThirdPartyHasOwner> b = a.join("thirdPartyHasOwners", JoinType.LEFT);

ParameterExpression<Integer> balance = cb.parameter(Integer.class);

Path<Integer> path = b.get("id").get("ownerId");

cq.where(cb.gt(path, balance));

cq.select(a);

TypedQuery<ThirdParty> queryS = emManager.createQuery(cq);

List<ThirdParty> results = queryS.setParameter(balance, 1).getResultList();

CriteriaBuilder cb=emManager.getCriteriaBuilder（）；
CriteriaQuery cq=cb.createQuery（ThirdParty.class）；
根a=cq.from（第三方类）；
Join b=a.Join（“第三方所有者”，JoinType.LEFT）；
ParameterExpression balance=cb.parameter（Integer.class）；
路径路径=b.get（“id”）.get（“ownerId”）；
cq.where（cb.gt（路径、平衡））；
cq.选择（a）；
TypedQuery queryS=emManager.createQuery（cq）；
List results=queryS.setParameter（balance，1.getResultList（）；
后代码

CriteriaBuilder cb = emManager.getCriteriaBuilder();
CriteriaQuery<ThirdParty> cq = cb.createQuery(ThirdParty.class);
Root<ThirdParty> a = cq.from(ThirdParty.class);
Join<ThirdParty, ThirdPartyHasOwner> b = a.join("thirdPartyHasOwners", JoinType.LEFT);

ParameterExpression<Integer> balance = cb.parameter(Integer.class);

cq.where(cb.equal( b.get("id").get("ownerId"),balance));

cq.select(a);

TypedQuery<ThirdParty> queryS = emManager.createQuery(cq);

List<ThirdParty> results = queryS.setParameter(balance, 1).getResultList();

CriteriaBuilder cb=emManager.getCriteriaBuilder（）；
CriteriaQuery cq=cb.createQuery（ThirdParty.class）；
根a=cq.from（第三方类）；
Join b=a.Join（“第三方所有者”，JoinType.LEFT）；
ParameterExpression balance=cb.parameter（Integer.class）；
cq.式中（cb.相等（b.获得（“id”）.获得（“所有者”），余额）；
cq.选择（a）；
TypedQuery queryS=emManager.createQuery（cq）；
List results=queryS.setParameter（balance，1.getResultList（）；
正在更改的代码是
cq.where（cb.gt（路径，平衡））至
cq.其中（cb.相等（b.获得（“id”）.获得（“所有者”），余额）此处使用的标准生成器equal等于
其中b.owner_id=balance
balance是一个参数
虽然日志很好，但我使用了不同的方法，给出了不同的数据集

代码之前


CriteriaBuilder cb = emManager.getCriteriaBuilder();
CriteriaQuery<ThirdParty> cq = cb.createQuery(ThirdParty.class);
Root<ThirdParty> a = cq.from(ThirdParty.class);
Join<ThirdParty, ThirdPartyHasOwner> b = a.join("thirdPartyHasOwners", JoinType.LEFT);

ParameterExpression<Integer> balance = cb.parameter(Integer.class);

Path<Integer> path = b.get("id").get("ownerId");

cq.where(cb.gt(path, balance));

cq.select(a);

TypedQuery<ThirdParty> queryS = emManager.createQuery(cq);

List<ThirdParty> results = queryS.setParameter(balance, 1).getResultList();



CriteriaBuilder cb=emManager.getCriteriaBuilder（）；
CriteriaQuery cq=cb.createQuery（ThirdParty.class）；
根a=cq.from（第三方类）；
Join b=a.Join（“第三方所有者”，JoinType.LEFT）；
ParameterExpression balance=cb.parameter（Integer.class）；
路径路径=b.get（“id”）.get（“ownerId”）；
cq.where（cb.gt（路径、平衡））；
cq.选择（a）；
TypedQuery queryS=emManager.createQuery（cq）；
List results=queryS.setParameter（balance，1.getResultList（）；


后代码


CriteriaBuilder cb = emManager.getCriteriaBuilder();
CriteriaQuery<ThirdParty> cq = cb.createQuery(ThirdParty.class);
Root<ThirdParty> a = cq.from(ThirdParty.class);
Join<ThirdParty, ThirdPartyHasOwner> b = a.join("thirdPartyHasOwners", JoinType.LEFT);

ParameterExpression<Integer> balance = cb.parameter(Integer.class);

cq.where(cb.equal( b.get("id").get("ownerId"),balance));

cq.select(a);

TypedQuery<ThirdParty> queryS = emManager.createQuery(cq);

List<ThirdParty> results = queryS.setParameter(balance, 1).getResultList();



CriteriaBuilder cb=emManager.getCriteriaBuilder（）；
CriteriaQuery cq=cb.createQuery（ThirdParty.class）；
根a=cq.from（第三方类）；
Join b=a.Join（“第三方所有者”，JoinType.LEFT）；
ParameterExpression balance=cb.parameter（Integer.class）；
cq.式中（cb.相等（b.获得（“id”）.获得（“所有者”），余额）；
cq.选择（a）；
TypedQuery queryS=emManager.createQuery（cq）；
List results=queryS.setParameter（balance，1.getResultList（）；


正在更改的代码是
cq.where（cb.gt（路径，平衡））至
cq.其中（cb.相等（b.获得（“id”）.获得（“所有者”），余额）此处使用的标准生成器等于
，其中b.owner_id=balance
balance是一个参数