實體關係沒有正確填充

Question

在使用Hibernate的Spring MVC應用程序中，連接ManyToMany關係中的兩個實體的列表未正確填充。這些實體是Encounter和Provider。 Encounter實體有一個屬性providers，它是一個Property實體的列表，但沒有正確填充。有人可以幫我弄清楚如何解決我的代碼，以便實體開始正確填充？

對於未能正確填充ArrayList中的控制器的方法中的代碼如下：

@RequestMapping("/calendar") 
public String showCalendar(@RequestParam("day") String day, org.springframework.web.context.request.WebRequest webRequest, Model model) { 
    String pid = webRequest.getParameter("pid"); 
    System.out.println("............ pid is: " + pid); 

    model.addAttribute("pid", pid); 
    LocalDate mydate; 

    if(day.equals("")) { 
     mydate = new LocalDate(); 
    } else { 
     mydate = new LocalDate(day); 
    } 

    System.out.println("------------------------ in controller, day of month is: " + mydate.getDayOfMonth()); 
    AppointmentCalendar calendar = new AppointmentCalendar(mydate); // Or whatever you do to create it 
    List<Encounter> encountersforday = (List<Encounter>) clinicService.getEncountersForDay(mydate); 

    model.addAttribute("calendar", calendar); 
    model.addAttribute("encountersforday", encountersforday); 

    System.out.println("number of encountersforday is: " + encountersforday.size()); 

    List<LocalTime> myblocks = calendar.getBlocks(); 
    int[][] filledblocks = new int[myblocks.size()][3]; 
    for (Integer i=0; i < encountersforday.size(); i++) { 
     System.out.println("i, encounterid, patientid, first, last, " + 
          "numProviders, dateTime are: " + i + ", " + 
          encountersforday.get(i).getId() + ", " + 
          encountersforday.get(i).getPatient().getId() + ", " + 
          encountersforday.get(i).getPatient().getFirstName() + ", " + 
          encountersforday.get(i).getPatient().getLastName() + ", " + 
          encountersforday.get(i).getProviders().size() + ", " + 
          encountersforday.get(i).getDateTime()); 
     for (Integer g=0; g < myblocks.size(); g++) { 
      filledblocks[g][0] = g;//blockid 
      if (myblocks.get(g).getHourOfDay() == encountersforday.get(i).getDateTime().getHourOfDay()) { 
       if (myblocks.get(g).getMinuteOfHour() == encountersforday.get(i).getDateTime().getMinuteOfHour()) { 
        int hours = myblocks.get(g).getHourOfDay(); 
        int mins = myblocks.get(g).getMinuteOfHour(); 
        System.out.println("found match at: "+hours+":"+mins); 
        filledblocks[g][1] = i+1;//encounterid 
        filledblocks[g][2] = 1;//segmentindex 
       } 
      } 
     } 
    } 

    return "appointments/calendar"; 
} 

在前面的代碼輸出的System.out.println()命令以下：

number of encountersforday is: 5 
i, encounterid, patientid, first, last, numProviders, dateTime are: 0, 1, 5, Peter, McTavish, 0, 2014-01-10T12:00:00.000-08:00 
found match at: 12:0 
i, encounterid, patientid, first, last, numProviders, dateTime are: 1, 2, 4, Harold, Davis, 0, 2014-01-10T11:30:00.000-08:00 
found match at: 11:30 
i, encounterid, patientid, first, last, numProviders, dateTime are: 2, 3, 3, Eduardo, Rodriquez, 0, 2014-01-10T10:00:00.000-08:00 
found match at: 10:0 
i, encounterid, patientid, first, last, numProviders, dateTime are: 3, 4, 2, Morticia, Adams, 0, 2014-01-10T09:30:00.000-08:00 
found match at: 9:30 
i, encounterid, patientid, first, last, numProviders, dateTime are: 4, 5, 1, Speed, Racer, 1, 2014-01-10T13:30:00.000-08:00 
found match at: 13:30 

正如你可以看到從上面的輸出中，只有Encounter對象中的一個具有大於0的numProviders。儘管事實上Encounters中的每一個都在基礎數據表中指定了Provider，但這是真實的。

注意：爲了簡化本貼，我已將相關代碼上傳到文件共享網站。您可以點擊下面的鏈接在文件共享網站上查看代碼。

您可以閱讀在底層數據庫at this link中爲encounters和providers創建和填充數據表的代碼。

Encounter實體的代碼是at this link。

Provider實體的代碼是at this link。

BaseEntity的代碼是at this link。

Person實體的代碼是at this link。

Answer 1

每個插入到providerEncounterJunction表中的使用相同的主鍵。我猜想他們只是簡單地相互覆蓋，而你在表中只有一行。