Primefaces积垢生成器一对多插入父id JPA

从NetBeans的primefaces CRUD生成器插件中，我得到了父表的以下代码：

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id_comments")
private Long idComments;

@OneToMany(mappedBy = "docDownloadComment")
private Collection<PmMain> pmMainCollection;

---

每当我在

comments

表中创建记录时，如何将生成的

id\u comments

插入

doc\u donwload\u comment

中？

假设您坚持comment，并且希望坚持PmMain

你自己 您必须保留您的注释对象

然后将PmMain类中设置docDownloadComment的每个对象持久化为您以前访问过的注释

就像这样：

entityManager.persist（注释）

级联型

---

您还可以在此关系上设置CascadeType，以便在新注释中自动保存所有pmmain。有关更多信息，请查看。

解决方案

多亏了Rjiuk和Billy Hope

我想与使用Primefaces积垢发生器的人分享我的解决方案

家长：

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id_comments")
private Long idComments;

@OneToMany(cascade = CascadeType.ALL, mappedBy = "docDownloadComment")
private List<PmMain> pmMainCollection = new ArrayList<>();

[... Getters and Setters ...]

public void setDocDownloadComment(PmMain pmMain){
    pmMain.setDocDownloadComment(this);
    pmMainCollection.add(pmMain);
}

从primefaces调用此方法，如：

<h:form id="ddCommentCreateForm">
    <h:panelGroup id="ddDisplay">

        <p:outputPanel id="ddCommentsPanel">

            <p:row>
                <p:column>
                    <p:inputTextarea id="commentText" value="#{commentsController.selected.commentText}" cols="100" rows="20" style="margin-bottom:10px"/>
                </p:column>
            </p:row>

        </p:outputPanel>

        <p:commandButton actionListener="#{commentsController.saveDocDownloadComment(pmMainController.selected.idPmMain, commentsController.selected.commentText)}" value="#{myBundle.Save}" update="ddDisplay,:PmMainListForm:datalist,:growl" oncomplete="handleSubmit(xhr,status,args,PF('ddDialog'));">
            <p:confirm header="#{myBundle.ConfirmationHeader}" message="#{myBundle.ConfirmEditMessage}" icon="ui-icon-alert"/>
        </p:commandButton>
        <p:commandButton value="#{myBundle.Cancel}" oncomplete="PF('ddDialog').hide()" update="nsDisplay" process="@this" immediate="true" resetValues="true"/>


    </h:panelGroup>

</h:form>

PrimeFaces“crud”生成器来自Netbeans或IntelliJ，但不来自PrimeFaces。上面的代码中没有与PF相关的内容。首先尝试进行单元测试……您应该向@OneToMany注释中添加一个cascade=CascadeType.ALL，mappedBy=“docdownloadcoment”表示与另一端相关的属性，因此当您向集合中添加对象时，id\u注释将被更新

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id_comments")
private Long idComments;

@OneToMany(cascade = CascadeType.ALL, mappedBy = "docDownloadComment")
private List<PmMain> pmMainCollection = new ArrayList<>();

[... Getters and Setters ...]

public void setDocDownloadComment(PmMain pmMain){
    pmMain.setDocDownloadComment(this);
    pmMainCollection.add(pmMain);
}

@Inject
CommentsFacade commentsFacadeEJB;
@Inject
PmMainFacade pmMainFacadeEJB;
public void saveDocDownloadComment(long idPmMain, String commentText){

    PmMain pmMain = pmMainFacadeEJB.find(idPmMain);
    Comments comments = new Comments();

    pmMain.setDocDownloadComment(comments);
    comments.setDocDownloadComment(pmMain);

    comments.setCommentText(commentText);
    commentsFacadeEJB.edit(comments);

}

<h:form id="ddCommentCreateForm">
    <h:panelGroup id="ddDisplay">

        <p:outputPanel id="ddCommentsPanel">

            <p:row>
                <p:column>
                    <p:inputTextarea id="commentText" value="#{commentsController.selected.commentText}" cols="100" rows="20" style="margin-bottom:10px"/>
                </p:column>
            </p:row>

        </p:outputPanel>

        <p:commandButton actionListener="#{commentsController.saveDocDownloadComment(pmMainController.selected.idPmMain, commentsController.selected.commentText)}" value="#{myBundle.Save}" update="ddDisplay,:PmMainListForm:datalist,:growl" oncomplete="handleSubmit(xhr,status,args,PF('ddDialog'));">
            <p:confirm header="#{myBundle.ConfirmationHeader}" message="#{myBundle.ConfirmEditMessage}" icon="ui-icon-alert"/>
        </p:commandButton>
        <p:commandButton value="#{myBundle.Cancel}" oncomplete="PF('ddDialog').hide()" update="nsDisplay" process="@this" immediate="true" resetValues="true"/>


    </h:panelGroup>

</h:form>