spring jpa onetomany关系@查询不工作

在对其进行了一些修补之后,我似乎以一种优雅的方式解决了我的问题,并且消除了使用@Query注释的需要。我连接了所有3个模型(源、提要和文章)中的所有关系。OneToMany和ManyToOne,然后能够使用findBy*生成的spring方法之一,并且可以工作。如果有人需要参考,下面是所有修改过的文件。

源模型:

package com.infostream.models;

import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;

import org.hibernate.validator.constraints.NotEmpty;

@Entity
@Table(name="sources")
public class Source extends Base {

    @NotNull
    @NotEmpty
    private String name;

    @OneToMany(mappedBy = "source", cascade = CascadeType.ALL)
    private Set<Feed> feeds;

    public String getName() {
        return name;
    }

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

    public Source() {

    }

    public Source(String name) {
        this.name = name;
    }

}

饲料型号:

package com.infostream.models;

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

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;

import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.infostream.serializers.JsonDateSerializer;

@Entity
@Table(name="feeds")
public class Feed extends Base {

    @ManyToOne
    @JoinColumn(name = "source_id", nullable = false)
    private Source source;


    @Column(name = "category_id", nullable = false)
    private String categoryId;

    @NotNull
    @Column(columnDefinition="text")
    private String url;

    @Column(name = "last_visited")
    private Date lastVisited;

    @OneToMany(mappedBy = "feed", cascade = CascadeType.ALL)
    private Set<Article> articles;

    public Feed() {
    }

    public Feed(Source source, String categoryId, String url) {
        this.source = source;
        this.categoryId = categoryId;
        this.url = url;
    }

    @JsonSerialize(using = JsonDateSerializer.class)
    public Date getLastVisited() {
        return lastVisited;
    }

    public void setLastVisited(Date lastVisited) {
        this.lastVisited = lastVisited;
    }

    public String getCategoryId() {
        return categoryId;
    }

    public void setCategoryId(String categoryId) {
        this.categoryId = categoryId;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }



}

文章模型:

package com.infostream.models;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;

@Entity
@Table(name = "articles")
public class Article extends Base {

    public Article() {

    }

    public Article(Feed feed, String title, String description, String url) {
        this.feed = feed;
        this.title = title;
        this.description = description;
        this.url = url;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDescription() {
        return description;
    }

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

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getImgUrl() {
        return imgUrl;
    }

    public void setImgUrl(String imgUrl) {
        this.imgUrl = imgUrl;
    }

    @ManyToOne
    @JoinColumn(name = "feed_id", nullable = false)
    private Feed feed;

    @NotNull
    @Column(columnDefinition="text")
    private String title;

    @Column(name = "img_url", columnDefinition="text")
    private String imgUrl;

    @Column(columnDefinition="text")
    private String description;

    @NotNull
    @Column(columnDefinition="text")
    private String url;

}

ArticleRepository文件

package com.infostream.repositories;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.repository.PagingAndSortingRepository;

import com.infostream.models.Article;
import java.lang.String;

public interface ArticleRepositoryImpl extends PagingAndSortingRepository<Article, Long> {
    Page<Article> findAll(Pageable pageRequest);

    Page<Article> findByFeedId(String feedId, Pageable pageable);

    Page<Article> findByFeed_sourceId(String sourceId, Pageable pageable);
}