Question

我正在使用Spring-mvc应用程序，该应用程序使用Spring Security作为ORM工具登录和休眠。因此，我的项目只有2个表，Table Person具有表注释的OneToMany映射。因此，一旦用户登录系统，他/她应该能够添加注释，但在添加时我还想保存Person的id，这就是我习惯OneToMany映射的原因。但我不知道如何获取用户的ID并将其放在表单中。以下是我的代码。

错误是

org.postgresql.util.PSQLException: ERROR: null value in column "personid" violates not-null constraint

这是可以理解的，这就是为什么我想知道我如何能够审视这个人格。

人物模型：

@Entity
@Table(name="person")
public class Person implements UserDetails{

    private static final GrantedAuthority USER_AUTH = new SimpleGrantedAuthority("ROLE_USER");

    @Id
    @Column(name="personid")
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "person_seq_gen")
    @SequenceGenerator(name = "person_seq_gen",sequenceName = "person_seq")
    private int id;

@OneToMany(mappedBy = "person1")
    private Set<Notes> notes1;
}

注意型号：

 @Entity
@Table(name="note")
public class Notes {

    @Id
    @Column(name="noteid")
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "note_gen")
    @SequenceGenerator(name = "note_gen",sequenceName = "note_seq")
    private int noteId;

  @ManyToOne
   @JoinColumn(name = "personid")
   private Person person1;
}

SQL：

CREATE TABLE public.person (
                personid INTEGER NOT NULL,
                firstname VARCHAR,
                username VARCHAR,
                password VARCHAR,
                CONSTRAINT id PRIMARY KEY (personid)
);


CREATE TABLE public.note (
                noteid INTEGER NOT NULL,
                sectionid INTEGER,
                canvasid INTEGER,
                text VARCHAR,
                notecolor VARCHAR,
                noteheadline VARCHAR,
                personid INTEGER NOT NULL,
                CONSTRAINT noteid PRIMARY KEY (noteid)
);


ALTER TABLE public.note ADD CONSTRAINT user_note_fk
FOREIGN KEY (personid)
REFERENCES public.person (personid)
ON DELETE NO ACTION
ON UPDATE NO ACTION
NOT DEFERRABLE;

人员控制器：

@Controller
public class PersonController {

    private PersonService personService;

    @Autowired(required=true)
    @Qualifier(value="personService")
    public void setPersonService(PersonService ps){
        this.personService = ps;
    }

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String listPersons(Model model) {

        model.addAttribute("person", new Person());
        model.addAttribute("listPersons", this.personService.listPersons());
        return "person";
    }


    //For add and update person both
    @RequestMapping(value= "/person/add", method = RequestMethod.POST)
    public String addPerson(@ModelAttribute("person") Person p){


            //new person, add it
            this.personService.addPerson(p);

        return "redirect:/";

    }

NoteController：

@Controller
public class NoteController {



    private NotesService notesService;

    @Autowired(required=true)
    @Qualifier(value="notesService")
    public void setNotesService(NotesService notesService){this.notesService=notesService;}

    @RequestMapping(value = "/notes", method = RequestMethod.GET)
    public String listNotes(Model model) {
        model.addAttribute("notes", new Notes());
        model.addAttribute("listnotes", this.notesService.listNotes());
        return "notes";
    }


    @RequestMapping(value= "/note/add", method = RequestMethod.GET)
    public String addNote(@ModelAttribute("notes") Notes p){
        this.notesService.addNote(p);
        return "redirect:/";
    }
}

Note.jsp（这是我添加笔记的地方。）

<c:url var="addAction" value="/note/add" ></c:url>
<form:form action="${addAction}" commandName="notes">
    <table>
        <c:if test="${!empty notes.note}">
            <tr>
                <td>
                    <form:label path="noteid">
                        <spring:message text="noteid"/>
                    </form:label>
                </td>
                <td>
                    <form:input path="noteid" readonly="true" size="8"  disabled="true" />
                    <form:hidden path="noteid" />
                </td>
            </tr>
        </c:if>

        <tr>
            <td>
                <form:label path="note">
                    <spring:message text="note"/>
                </form:label>
            </td>
            <td>
                <form:input path="note" />
            </td>
        </tr>
        <tr>
            <td>
                <form:label path="notetag">
                    <spring:message text="notetag"/>
                </form:label>
            </td>
            <td>
                <form:input path="notetag" />
            </td>
        </tr>
        <tr>
            <td>
                <form:label path="notecolor">
                    <spring:message text="notecolor"/>
                </form:label>
            </td>
            <td>
                <form:input path="notecolor" />
            </td>
        </tr>

        <tr>
            <td>
                <form:label path="canvasid">
                    <spring:message text="canvasid"/>
                </form:label>
            </td>
            <td>
                <form:input path="canvasid" />
            </td>
        </tr>

        <tr>
            <td>
                <form:label path="sectionid">
                    <spring:message text="sectionid"/>
                </form:label>
            </td>
            <td>
                <form:input path="sectionid" />
            </td>
        </tr>

        <tr>
            <td colspan="2">
                <c:if test="${!empty notes.note}">
                    <input type="submit"
                           value="<spring:message text="Edit note"/>" />
                </c:if>
                <c:if test="${empty notes.note}">
                    <input type="submit"
                           value="<spring:message text="Add note"/>" />
                </c:if>
            </td>
        </tr>
    </table>
</form:form>

Answer 1

不确定我是否理解正确但是当一个线程中有一个登录用户（Principal）时，您可以使用SecurityContextHolder.getContext().getAuthentication().getPrincipal()来获取Principal或者仅使用@AuthenticationPrincipal或仅使用public String addNote(@ModelAttribute("notes") Notes p, @AuthenticationPrincipal Person person)) { p.setPerson1(person); this.notesService.addNote(p); return "redirect:/"; }注入它确保你的Person实现了Principal接口并直接注入它（我假设Person是用户而User是一个Principal）来获取person.id。

在/ note / add中尝试这样：

{{1}}

如果您想避免手动设置，请考虑使用AuditorAware和Auditable，如下所示： http://www.springbyexample.org/examples/spring-data-jpa-auditing-code-example.html

使用登录的用户ID（外键）在oneToMany映射中填写表单

1 个答案: