休眠條件問題：無法解析屬性：

Question

我面臨一個小問題：我想使用標准選擇 CampaignProgression 平均值等於 100 的campaignProgression ：

這是 SQL 中的查詢：

    SELECT * FROM campagne as camp, progression_campagne as campProg 
where camp.id = campProg.current_campaign and 
(SELECT avg(campaign_progression) FROM progression_campagne)=100 group by camp.id;

這是標准中的翻譯：

Criteria crit = getSessionFactory().getCurrentSession().createCriteria(Campagne.class);
        crit.createAlias("progressionCampagnes", "prog");
        crit.setProjection(Projections.projectionList().add(Projections.groupProperty("prog.campagne")).add(Projections.avg("prog.campaignProgression"),"moy"));
        crit.add(Restrictions.eq("moy", new Float(100)));

但我收到此錯誤：

org.hibernate.QueryException：無法解析屬性：moy of：ma.dataprotect.sensipro.model.Campagne

編輯：

以下是Campaign和ProgressionCampaign的模型類：

Campagne.java :

    package ma.dataprotect.sensipro.model;

// Generated 10 ao�t 2015 14:36:11 by Hibernate Tools 3.4.0.CR1

import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;

import static javax.persistence.GenerationType.IDENTITY;

import org.hibernate.Hibernate;
import javax.persistence.CascadeType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

/**
 * Campagne generated by hbm2java
 */
@SuppressWarnings("serial")
@Entity
@Table(name = "campagne")
public class Campagne implements java.io.Serializable {

    private Long id;
    private String name;
    private Organism organism;
    private byte[] image;
    private Date launchDate;
    private Date endDate;
    private String description;
    private Set<User> users = new HashSet<User>();
    private Set<ProgressionCampagne> progressionCampagnes = new HashSet<ProgressionCampagne>();
    private Set<ProgressionCours> progressionCourses = new HashSet<ProgressionCours>();
    private Long notificationid;
    private Boolean isStdr;
    private Set<Cours> courses = new HashSet<Cours>();

    public Campagne() {
    }

    public Campagne(String name, Date launchDate) {
        this.name = name;
        this.launchDate = launchDate;
    }

    public Campagne(String name, String description) {
        this.name = name;
        this.description = description;
    }

    public Campagne(String name, String description, byte[] image, Organism org) {
        this.name = name;
        this.description = description;
        this.image = image;
        this.organism = org;
    }

    public Campagne(String name, Date launchDate, Date endDate,
            String description, Set<User> users,
            Set<ProgressionCampagne> progressionCampagnes,
            Set<ProgressionCours> progressionCourses) {
        this.name = name;
        this.launchDate = launchDate;
        this.endDate = endDate;
        this.description = description;
        this.users = users;
        this.progressionCampagnes = progressionCampagnes;
        this.progressionCourses = progressionCourses;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public Long getId() {
        return this.id;
    }

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

    @Column(name = "name", nullable = false, length = 100)
    public String getName() {
        return this.name;
    }

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

    @Temporal(TemporalType.DATE)
    @Column(name = "launchDate", length = 10)
    public Date getLaunchDate() {
        return this.launchDate;
    }

    public void setLaunchDate(Date launchDate) {
        this.launchDate = launchDate;
    }

    @Temporal(TemporalType.DATE)
    @Column(name = "endDate", length = 10)
    public Date getEndDate() {
        return this.endDate;
    }

    public void setEndDate(Date endDate) {
        this.endDate = endDate;
    }

    @Column(name = "description")
    public String getDescription() {
        return this.description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    @Column(name = "notificationid")
    public Long getNotificationid() {
        return notificationid;
    }

    public void setNotificationid(Long notificationid) {
        this.notificationid = notificationid;
    }

    @ManyToMany
    @JoinTable(name = "user_campagne", joinColumns = { @JoinColumn(name = "campagneid", nullable = false, updatable = true) }, inverseJoinColumns = { @JoinColumn(name = "userid", nullable = false, updatable = true) })
    public Set<User> getUsers() {
//      Hibernate.initialize(users);
        return this.users;
    }

    public void setUsers(Set<User> users) {
        this.users = users;
    }

    @OneToMany(mappedBy = "campagne")
    public Set<ProgressionCampagne> getProgressionCampagnes() {
        return this.progressionCampagnes;
    }

    public void setProgressionCampagnes(
            Set<ProgressionCampagne> progressionCampagnes) {
        this.progressionCampagnes = progressionCampagnes;
    }

    @OneToMany(mappedBy = "campagne")
    public Set<ProgressionCours> getProgressionCourses() {
        return this.progressionCourses;
    }

    public void setProgressionCourses(Set<ProgressionCours> progressionCourses) {
        this.progressionCourses = progressionCourses;
    }

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "organismsid", nullable = false)
    public Organism getOrganism() {
        return this.organism;
    }

    public void setOrganism(Organism organism) {
        this.organism = organism;
    }

    @Column(name = "image", length = 5242880)
    public byte[] getImage() {
        return this.image;
    }

    public void setImage(byte[] image) {
        this.image = image;
    }

    @Column(name = "isStdr", nullable = false, length = 0, columnDefinition = "bit")
    public Boolean getIsStdr() {
        return isStdr;
    }

    public void setIsStdr(Boolean isStdr) {
        this.isStdr = isStdr;
    }

    @ManyToMany(cascade = { CascadeType.MERGE }, fetch = FetchType.LAZY)
    @JoinTable(name = "campagne_cours", joinColumns = { @JoinColumn(name = "campagne_id") }, inverseJoinColumns = { @JoinColumn(name = "cours_id") })
    public Set<Cours> getCourses() {
        return courses;
    }

    public void setCourses(Set<Cours> courses) {
        this.courses = courses;
    }


    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Campagne other = (Campagne) obj;
        if (id == null) {
            if (other.id != null)
                return false;
        } else if (!id.equals(other.id))
            return false;
        return true;
    }

}

ProgressionCampagne.java

    package ma.dataprotect.sensipro.model;

// Generated 10 ao�t 2015 14:36:11 by Hibernate Tools 3.4.0.CR1

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;

import static javax.persistence.GenerationType.IDENTITY;

import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

/**
 * ProgressionCampagne generated by hbm2java
 */
@SuppressWarnings("serial")
@Entity
@Table(name = "progression_campagne")
public class ProgressionCampagne implements java.io.Serializable {

    private Long id;
    private Campagne campagne;
    private User user;
    private Cours cours;
    private float campaignProgression;
    private float campaignScore;
    private Float campagneCorrectAnswer;
    private Long campagneNbrEssai;
    private Date dateDebutCamp;
    private Date dateFinCamp;

    public ProgressionCampagne() {

    }

    public ProgressionCampagne(Campagne campagne, User user, Cours cours,
             float campaignProgression, float campaignScore,
            Date dateDebutCamp, Date dateFinCamp) {
        super();
        this.campagne = campagne;
        this.user = user;
        this.cours = cours;
        this.campaignProgression = campaignProgression;
        this.campaignScore = campaignScore;
        this.dateDebutCamp = dateDebutCamp;
        this.dateFinCamp = dateFinCamp;
    }

    public ProgressionCampagne(Campagne campagne, User user, Cours cours,
             int campaignProgression) {
        this.campagne = campagne;
        this.user = user;
        this.cours = cours;
        this.campaignProgression = campaignProgression;
    }

    public ProgressionCampagne(Campagne campagne, User user, Cours cours,
             int campaignProgression,Date dateDebut) {
        this.campagne = campagne;
        this.user = user;
        this.cours = cours;
        this.campaignProgression = campaignProgression;
        this.dateDebutCamp=dateDebut;
    }

    public ProgressionCampagne(Campagne campagne, User user, 
             int campaignProgression,Date dateDebut) {
        this.campagne = campagne;
        this.user = user;
        this.campaignProgression = campaignProgression;
        this.dateDebutCamp=dateDebut;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public Long getId() {
        return this.id;
    }

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

    @ManyToOne
    @JoinColumn(name = "current_campaign", nullable = false)
    public Campagne getCampagne() {
        return this.campagne;
    }

    public void setCampagne(Campagne campagne) {
        this.campagne = campagne;
    }

    @ManyToOne
    @JoinColumn(name = "usersid", nullable = false)
    public User getUser() {
        return this.user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    @ManyToOne
    @JoinColumn(name = "current_course", nullable = true)
    // false
    public Cours getCours() {
        return this.cours;
    }

    public void setCours(Cours cours) {
        this.cours = cours;
    }



    @Column(name = "campaign_progression", nullable = false)
    public float getCampaignProgression() {
        return this.campaignProgression;
    }

    public void setCampaignProgression(float campaignProgression) {
        this.campaignProgression = campaignProgression;
    }

    @Column(name = "campaign_score", nullable = true)
    public float getCampaignScore() {
        return campaignScore;
    }

    public void setCampaignScore(float campaignScore) {
        this.campaignScore = campaignScore;
    }

    @Column(name = "date_debut_camp", nullable = true)
    public Date getDateDebutCamp() {
        return dateDebutCamp;
    }

    public void setDateDebutCamp(Date dateDebutCamp) {
        this.dateDebutCamp = dateDebutCamp;
    }

    @Column(name = "date_fin_camp", nullable = true)
    public Date getDateFinCamp() {
        return dateFinCamp;
    }

    public void setDateFinCamp(Date dateFinCamp) {
        this.dateFinCamp = dateFinCamp;
    }

    @Column(name = "campagne_correct_answer", nullable = true)
    public Float getCampagneCorrectAnswer() {
        return campagneCorrectAnswer;
    }

    public void setCampagneCorrectAnswer(Float campagneCorrectAnswer) {
        this.campagneCorrectAnswer = campagneCorrectAnswer;
    }

    @Column(name = "campagne_nbr_essai", nullable = true)
    public Long getCampagneNbrEssai() {
        return campagneNbrEssai;
    }

    public void setCampagneNbrEssai(Long campagneNbrEssai) {
        this.campagneNbrEssai = campagneNbrEssai;
    }

}

Answer 1

好的，在您的標准中，您必須使用子查詢才能實現 HAVING 功能。 這是代碼：

        DetachedCriteria innerCrit = DetachedCriteria.forClass(Campagne.class);
        innerCrit.createAlias("progressionCampagnes", "prog");
        innerCrit.setProjection(Projections.avg("prog.campaignProgression");
        innerCrit.add(Restrictions.eqProperty("id", "campOuter.id"));

        DetachedCriteriaouterCrit = DetachedCriteria.forClass(Campagne.class, "campOuter");
        outerCrit.add(Subqueries.eq(100, innerCrit));

這應該為您提供原始的 sql 結果。