Student<\/code> Entity:<\/p>\n\n@OneToMany(cascade = CascadeType.ALL,\n fetch = FetchType.LAZY,\n mappedBy = "student")\nprivate List courseList = new ArrayList<>();\n<\/pre>\nAnd the Course<\/code> entity:<\/p>\n\n@OneToOne(fetch = FetchType.LAZY)\n@JoinColumn(name = "STUDENT_ID", nullable = false)\nprivate Student student;\n<\/pre>\nI thought in the Course<\/code> entity, the inverse annotation would be a @ManyToOne<\/code> but I found a @OneToOne<\/code>. Is this possible given your statement in one of your article:<\/p>\n“The bidirectional association requires the child entity mapping to provide a @ManyToOne annotation, which is responsible for controlling the association.”<\/p>\n
Thanks<\/p>\n","protected":false},"excerpt":{"rendered":"
Hi Vlad, thanks for your blogs on JPA and Hibernate.<\/p>\n
In my codebase, I found a <code>Student<\/code> and <code>Course<\/code> entity classes with the below relationships.<\/p>\n
The <code>Student<\/code> Entity:<\/p>\n
[code lang=”java”]
\n@OneToMany(cascade = CascadeType.ALL,
\n fetch = FetchType.LAZY,
\n mappedBy = “student”)
\nprivate List courseList = new ArrayList<>();
\n[\/code]<\/p>\n
And the <code>Course<\/code> entity:<\/p>\n
[code lang=”java”]
\n@OneToOne(fetch = FetchType.LAZY)
\n@JoinColumn(name = “STUDENT_ID”, nullable = false)
\nprivate Student student;
\n[\/code]<\/p>\n
I thought in the <code>Course<\/code> entity, the inverse annotation would be a <code>@ManyToOne<\/code> but I found a <code>@OneToOne<\/code>. Is this possible given your statement in one of your article:<\/p>\n
“The bidirectional association requires the child entity mapping to provide a @ManyToOne annotation, which is responsible for controlling the association.”<\/p>\n
Thanks \u95b1\u8b80\u5168\u6587 →<\/span><\/a><\/p>\n","protected":false},"author":691,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"slim_seo":[],"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[2,6,315,7],"tags":[398,402,397,414,413,410,409,407,408,406,399,400,394,318,375,523,558,556,557,560,559,555,561,566,553,554,6339,6340,565,563,564,562,183,184,567,524,232,10,401,396,381,403,412,411,395,405,404,457,454,320,319,316,26,317],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p7prtj-DqJ","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/151573"}],"collection":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/users\/691"}],"replies":[{"embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/comments?post=151573"}],"version-history":[{"count":1,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/151573\/revisions"}],"predecessor-version":[{"id":151574,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/151573\/revisions\/151574"}],"wp:attachment":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/media?parent=151573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/categories?post=151573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/tags?post=151573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}