Spring Data JPA一对多POST映射问题

如何解决Spring Data JPA一对多POST映射问题

我正在尝试为视频库开发REST API。使用电影控制器，我想获取，发布，放置和删除电影实体（具有ID（已生成类型标识，并且是主键），标题，类型，费率和库存编号的列

“流派”是另一种实体，因为一部电影可能是唯一的流派（在我的项目中）

我希望我的api接受以下JSON请求

{
  "title":"John Wick","rate":8.2,"numberInStock":19,"genreId":2
}

so genreId指向ID类型表，并指向ID为2的类型名称，即“动作”

当我尝试发布以下电影时，邮递员出现415错误

{
    "timestamp": "2020-08-11T03:57:31.792+00:00","status": 415,"error": "Unsupported Media Type","message": "","path": "/video-library/movies/"
}

有人，请指导我做错了地方

Movie.java

@Entity
@Table
public class Movie {
    
  @Id
  @GeneratedValue (strategy = GenerationType.IDENTITY)
  @Column(name = "id")
  private Integer id;
  private String title;
  private int rate;
  
  @Column(name = "numberInStock")
  private int numberInStock;
  
  
  @ManyToOne(targetEntity = Genre.class)
  @JoinColumn(name="genreId")
  private Genre genre;

  public Movie() {

  }

public Movie(Integer id,String title,int rate,int numberInStock,Genre genre) {
    super();
    this.id = id;
    this.title = title;
    this.rate = rate;
    this.numberInStock = numberInStock;
    this.genre = genre;
}

public Integer getId() {
    return id;
}

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

public String getTitle() {
    return title;
}

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

public int getRate() {
    return rate;
}

public void setRate(int rate) {
    this.rate = rate;
}

public int getNumberInStock() {
    return numberInStock;
}

public void setNumberInStock(int numberInStock) {
    this.numberInStock = numberInStock;
}

@JsonManagedReference 
public Genre getGenre() {
    return genre;
}

public void setGenre(Genre genre) {
    this.genre = genre;
}


}

Genre.java

@Entity
@Table
public class Genre {

@Id
@Column(name="genreId")
@GeneratedValue(strategy = GenerationType.IDENTITY)

private Integer id;

@OneToMany(mappedBy="genre",cascade = CascadeType.ALL)
private Set<Movie> movie;

@Column(name ="genre")
private String genre;



public Genre() {

}



public Genre(Integer id,Set<Movie> movie,String genre) {
    super();
    this.id = id;
    this.movie = movie;
    this.genre = genre;
}



public Integer getId() {
    return id;
}



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

@JsonBackReference
public Set<Movie> getMovie() {
    return movie;
}


public void setMovie(Set<Movie> movie) {
    this.movie = movie;
}



public String getGenre() {
    return genre;
}



public void setGenre(String genre) {
    this.genre = genre;
}



}

MovieRestcontroller

@CrossOrigin(origins = "http://localhost:3000")
@RestController
@RequestMapping("/video-library")
public class MovieController {

  @Autowired
  private  MoiveRepository movieRepository;



  //CRATE
  //Add movie
  @PostMapping("/movies")
  public Movie createMovie(@RequestBody Movie movie)
  {
    return movieRepository.save(movie);
  }

  //READ
  //Get a list of all movies
  @GetMapping("/movies")
  public List<Movie> getAllMovie(){
    return movieRepository.findAll();
  }

  //Get single movie
  @GetMapping("/movies/{id}")
  public ResponseEntity<Movie> getMovieById(@PathVariable Integer id){
    Movie movie = movieRepository.findById(id).orElseThrow(()->
      new ResourseNotFoundException("404 Error: Movie not exist with the Given "+id));
    return ResponseEntity.ok(movie);
  }

  //UPDATE
  //Updated movie
  @PutMapping("/movies/{id}")
  public ResponseEntity <Movie> updateMovie(@PathVariable Integer id,@RequestBody Movie movieDetails){
    Movie movie = movieRepository.findById(id).orElseThrow((() ->
      new ResourseNotFoundException("404 Error: Movie not exist with the Given "+id)));


    movie.setTitle(movieDetails.getTitle());
    movie.setRate(movieDetails.getRate());
//    movie.setGenre(movieDetails.getGenre());
    movie.setNumberInStock(movieDetails.getNumberInStock());

    Movie updateMovie = movieRepository.save(movie);
    Map<String,Boolean> response = new HashMap<>();
    response.put("Movie Updated Successfully",Boolean.TRUE);
    return  ResponseEntity.ok(updateMovie);
  }

  //DELETE
  //Delete movie
  @DeleteMapping("/movies/{id}")
  public ResponseEntity <Map<String,Boolean>> deleteMovie(@PathVariable Integer id){
    Movie employee = movieRepository.findById(id)
      .orElseThrow((() -> new ResourseNotFoundException("404 Error: Movie not exist with the Given "+id)));
    movieRepository.delete(employee);
    Map<String,Boolean> response = new HashMap<>();
    response.put("Movie Deleted Successfully",Boolean.TRUE);
    return ResponseEntity.ok(response);
  }
  
  
}

GenreController

@CrossOrigin(origins = "http://localhost:3000")
@RestController
@RequestMapping("/video-library")
public class GenreController {
    @Autowired
    public GenreRepository genreRepository;
    
    
      @PostMapping("/genre")
      public Genre createGenre(@RequestBody Genre genre)
      {
        return genreRepository.save(genre);
      }
      
      @GetMapping("/genre")
      public List<Genre> getAllGenre(){
        return genreRepository.findAll();
      }


      @GetMapping("/genre/{id}")
      public ResponseEntity<Genre> getGenreById(@PathVariable Integer id){
        Genre genre = genreRepository.findById(id).orElseThrow(()->
          new ResourseNotFoundException("404 Error: Genre not exist with the Given "+id));
        return ResponseEntity.ok(genre);
      }
}

解决方法

尝试在pair和Sub LoopThroughFolder() Dim MyFile As String,Str As String,MyDir As String,Wb As Workbook Dim Rws As Long,Rng As Range,r As Range Set Wb = ThisWorkbook: Wb.Sheets(2).Range("L:L").ClearContents Dim FSO As Object,fld As Object,Fil As Object Dim wbkCS As Workbook Dim FolderPath As String Dim fsoFile As Object Dim fsoFol As Object Dim fileName As String Dim sWb As Workbook Dim MatchingColumn As Range Dim MatchingRowNb As Long MsgBox "Choose a folder: " Application.DisplayAlerts = False With Application.FileDialog(msoFileDialogFolderPicker) .InitialFileName = "C:\Users\" .AllowMultiSelect = False If .Show <> -1 Then MsgBox "No folder selected! Exiting script." Exit Sub End If FolderPath = .SelectedItems(1) End With If Right(FolderPath,1) <> "\" Then FolderPath = FolderPath + "\" End If Set FSO = CreateObject("Scripting.FileSystemObject") Set fld = FSO.GetFolder(FolderPath) If FSO.FolderExists(fld) Then For Each fsoFol In FSO.GetFolder(FolderPath).SubFolders For Each fsoFile In fsoFol.Files If Mid(fsoFile.Name,InStrRev(fsoFile.Name,".") + 1) = "xlsx" Then fileName = fsoFile.Name Application.ScreenUpdating = False MyDir = FolderPath 'fld fileName = Dir(MyDir & "*.xlsx") ChDir MyDir Application.ScreenUpdating = False Application.DisplayAlerts = False Do While fileName <> "" Set sWb = Workbooks.Open(fileName) With sWb.Worksheets(2) Rws = .Cells(Rows.Count,12).End(xlUp).Row Set Rng = Range(.Cells(5,1),.Cells(Rws,12)) End With With Wb.Worksheets(2) Set MatchingColumn = .Range(.Cells(5,.Cells(.Rows.Count,1).End(xlUp)) For Each r In Rng.Rows If r.Cells(1,1).Value2 <> vbNullString Then 'Ignoring empty rows If r.Rows.Hidden = False Then 'We find the row where the Ids matche MatchingRowNb = Application.Match(r.Cells(1,1).Value2,MatchingColumn,False) 'We add the current value in the cell with the new value comming from the other file .Cells(4 + MatchingRowNb,12).Value2 = .Cells(4 + MatchingRowNb,12).Value2 + r.Cells(1,12).Value2 End If End If Next End With sWb.Close SaveChanges:=True Application.DisplayAlerts = True fileName = Dir() Loop End If Next Next End If End Sub注释中使用consumes和produces属性，例如：

@GetMapping

您传递了错误的请求。您的请求应包含@PostMapping作为对象。尝试

@PostMapping(path = "/genre",consumes = MediaType.APPLICATION_JSON_VALUE,produces = MediaType.APPLICATION_JSON_VALUE)

@GetMapping(path = "/movies/{id}",produces = MediaType.APPLICATION_JSON_VALUE)

您使用哪个客户端来测试REST API？

所有客户端都有选项，可让您根据请求设置Content-type:application/json标头。

在邮递员中，依次选择Body标签和raw，然后将右侧的TEXT更改为JSON。

Spring Data JPA一对多POST映射问题

如何解决Spring Data JPA一对多POST映射问题

解决方法

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