我有一个表cards
,它与一对一关系的其他主表(分部和单元)相关。
在UI上我显示下拉菜单以选择卡片的除法和单位值,这是在CardController.java
@RequestMapping(value = "/addCardForm", method = RequestMethod.GET)
public String addCardForm(ModelMap map)
{
map.addAttribute("divisions", divisionService.getAllDivisions());
map.addAttribute("units", unitService.getAllUnits());
return "admin/addCard";
}
addCard.jsp
:
<form:form method="post" action="addCard">
<table cellspacing="10" id="card-table">
<tr>
<td><label for="division" class="control-label">Division : </label></td>
<td><select name="division" class="selectpicker">
<option>Select</option>
<c:forEach items="${divisions}" var="division">
<option value="${division.id}">${division.name}</option>
</c:forEach>
</select></td>
</tr>
<tr>
<td><label for="unit" class="control-label">Unit : </label></td>
<td><select name="unit" class="selectpicker">
<option>Select</option>
<c:forEach items="${units}" var="unit">
<option value="${unit.id}">${unit.name}</option>
</c:forEach>
</select></td>
</tr>
<tr>
<td><button type="submit" class="btn btn-primary">Submit</button></td>
<td></td>
</tr>
</table>
</form>
下拉数据填充了数据,但是在提交表单时,将其未设置的分区或单元设置为cardEntity对象,它们被设置为null,这是控制器中的addCard函数:
@RequestMapping(value = "/addCard", method = RequestMethod.POST)
public String addCard(@ModelAttribute(value="card") CardEntity card, BindingResult result)
{
cardService.addCard(card);
//card.getDivision(); -- this is null
return "redirect:/card";
}
除了下拉菜单外,还会在卡片中添加其他字段。
CardEntity.java
@Entity
@Table(name="cards")
@Proxy(lazy=false)
public class CardEntity {
@Id
@Column(name="id")
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@OneToOne
@JoinColumn(name="division_id", referencedColumnName="id")
private DivisionEntity division;
@OneToOne
@JoinColumn(name="unit_of_qty_id", referencedColumnName="id")
private UnitEntity units;
public DivisionEntity getDivision() {
return division;
}
public void setDivision(DivisionEntity division) {
this.division = division;
}
public UnitEntity getUnits() {
return units;
}
public void setUnits(UnitEntity units) {
this.units = units;
}
}
编辑:
我必须手动设置divisionEntity和unitEntity:
@RequestMapping(value = "/addCard", method = RequestMethod.POST)
public String addCard(HttpServletRequest request, @ModelAttribute(value="card") CardEntity card, BindingResult result)
{
card.setDivision(divisionService.findOne(Integer.parseInt(request.getParameter("division"))));
card.setUnit(unitService.findOne(Integer.parseInt(request.getParameter("unit"))));
cardService.addCard(card);
return "redirect:/card";
}
所以我想问题是divisionEntity
并且在提交表单后没有在卡片中设置unitEntity
个对象。
答案 0 :(得分:1)
您也可以这样做:
<tr>
<td><label for="division.id" class="control-label">Division : </label></td>
<td><select name="division.id" class="selectpicker">
<option>Select</option>
<c:forEach items="${divisions}" var="division">
<option value="${division.id}">${division.name}</option>
</c:forEach>
</select></td>
</tr>
<tr>
<td><label for="unit.id" class="control-label">Unit : </label></td>
<td><select name="unit.id" class="selectpicker">
<option>Select</option>
<c:forEach items="${units}" var="unit">
<option value="${unit.id}">${unit.name}</option>
</c:forEach>
</select></td>
</tr>
其余部分与原作相同。但是:
Division
class; CardEntity
应该有getUnit()
和setUnit()
,而不是getUnits()
和setUnits()
。希望有所帮助。