如何使用包含嵌套类的请求XML在grails中将数据绑定到bindData [英] How to bind data with bindData in grails with request XML that contains a nested class

问题描述

我有这样的XML

 <？xml version =1.0encoding =UTF-8？> ; 
< myModel id =mybiz.MyModelIdId@36491253> 
< id> 
< class> mybiz.MyModelId< / class> 
< idPart1> 1292< / idPart1> 
< idPart2> somestring< / idPart2> 
< / id> 
< otherStuff> 233< / otherStuff> 
< / myModel> 
  

现在，我想使用如下的绑定数据：

  def save（）{
 MyModel model = new MyModel（）
 bindData（model，request.XML）
 log.info （other stuff =+ model.otherStuff）
 log.info（idPart1 =+ model.id.idPart1）
 log.info（idPart2 =+ model.id.idPart2）
  

但我得到所有 null s作为输出，所以它没有奏效。然而，当我使用下面的代码时：

  def grailsWebDataBinder 
 def save（）{
 MyModel model = new MyModel（）
 grailsWebDataBinder.bind模型，request.XML 
 log.info（other stuff =+ model.otherStuff）
 log.info（idPart1 =+ model.id .idPart1）
 log.info（idPart2 =+ model.id.idPart2）
  

我得到 233 作为输出，然后是 id 属性的空指针异常。

我做错了什么？

（我使用的是grails 2.3.7）

> MyModel.java：

  @XmlRootElement 
 @Entity 
 @Table（name =MY_MODEL
，schema =MY_SCHEMA
）
 public class MyModel实现java.io.Serializable {
 
 private MyModelId id; 
 private BigDecimal otherStuff; 
 $ b $ public MyModel（）{
} 
 
 public MyModel（MyModelId id，BigDecimal otherStuff）{
 this.id = id; 
 this.otherStuff = otherStuff; 
} 
 
 @EmbeddedId 
 @AttributeOverrides（{
 @AttributeOverride（name =idPart1，column = @ Column（name =ID_PART1，nullable = false ，precision = 22，scale = 0）），
 @AttributeOverride（name =idPart2，column = @ Column（name =ID_PART2，nullable = false，length = 240））}）
 public MyModelId getId（）{
 return this.id; 
} 
 
 public void setId（MyModelId id）{
 this.id = id; 
 
 
 @Column（name =OTHER_STUFF，nullable = false，precision = 22，scale = 0）
 public BigDecimal getOtherStuff（）{
 return this 。其他的东西; 
} 
 
 public void setOtherStuff（BigDecimal otherStuff）{
 this.otherStuff = otherStuff; 
} 
 
} 
  

MyModelId.java：

  @XmlRootElement 
 @Embeddable 
公共类MyModelId实现java.io.Serializable {
 
私人BigDecimal idPart1; 
私人字符串idPart2; 
 $ b $ public MyModelId（）{
} 
 
 public MyModelId（BigDecimal idPart1，String idPart2）{
 this.idPart1 = idPart1; 
 this.idPart2 = idPart2; 
 
 $ b @Column（name =ID_PART1，nullable = false，precision = 22，scale = 0）
 public BigDecimal getIdPart1（）{
 return this .idPart1; 
} 
 
 public void setIdPart1（BigDecimal idPart1）{
 this.idPart1 = idPart1; 
 
 
 @Column（name =ID_PART2，nullable = false，length = 240）
 public String getIdPart2（）{
 return this.idPart2; 
} 
 
 public void setIdPart2（String idPart2）{
 this.idPart2 = idPart2; 
 
 
 public boolean equals（Object other）{
 if（（this == other））return true; 
 if（（other == null））return false; 
 if（！（other instanceof MyModelId））return false; 
 MyModelId castOther =（MyModelId）other; $（）this.getIdPart1（）== castOther.getIdPart1（））||（this.getIdPart1（）！= null&&& castOther.getIdPart1（）！= null&& amp ; this.getIdPart1（）。equals（castOther.getIdPart1（））））
&& （this.getIdPart2（）== castOther.getIdPart2（））||（this.getIdPart2（）！= null&& castOther.getIdPart2（）！= null&& this.getIdPart2（）。equals castOther.getIdPart2（））））; 
} 
 
 public int hashCode（）{
 int result = 17; 
 
 result = 37 * result +（getIdPart1（）== null？0：this.getIdPart1（）。hashCode（））; 
 result = 37 * result +（getIdPart2（）== null？0：this.getIdPart2（）。hashCode（））; 
返回结果; 
} 
 
} 
  

解决方案

以下工作

  def id 
 id = new MyModelId（）
 bindData（id， request.XML.id）
 MyModel model = MyModel.get（id）
 bindData（model，request.XML）
  

I have xml like this

<?xml version="1.0" encoding="UTF-8"?>
<myModel id="mybiz.MyModelIdId@36491253">
  <id>
    <class>mybiz.MyModelId</class>
    <idPart1>1292</idPart1>
    <idPart2>somestring</idPart2>
  </id>
  <otherStuff>233</otherStuff>
</myModel>

Now, I would like to use bind data like this:

def save() {
    MyModel model = new MyModel()
    bindData(model,request.XML)
    log.info("other stuff = "+model.otherStuff)
    log.info("idPart1 = "+model.id.idPart1)
    log.info("idPart2 = "+model.id.idPart2)

but I get all nulls as output, so it hasn't worked. However, when I use the following code

def grailsWebDataBinder
def save() {
    MyModel model = new MyModel()
    grailsWebDataBinder.bind model, request.XML
    log.info("other stuff = "+model.otherStuff)
    log.info("idPart1 = "+model.id.idPart1)
    log.info("idPart2 = "+model.id.idPart2)

I get 233 as output then a null pointer exception for the id attribute.

What am I doing wrong?

(I'm using grails 2.3.7)

UPDATE

Here are the domain classes (with composite id)

MyModel.java:

@XmlRootElement
@Entity
@Table(name="MY_MODEL"
    ,schema="MY_SCHEMA"
)
public class MyModel implements java.io.Serializable {

    private MyModelId id;
    private BigDecimal otherStuff;

    public MyModel() {
    }

    public MyModel(MyModelId id, BigDecimal otherStuff) {
        this.id = id;
        this.otherStuff = otherStuff;
    }

    @EmbeddedId
    @AttributeOverrides( {
        @AttributeOverride(name="idPart1", column=@Column(name="ID_PART1", nullable=false, precision=22, scale=0) ), 
        @AttributeOverride(name="idPart2", column=@Column(name="ID_PART2", nullable=false, length=240) ) } )
    public MyModelId getId() {
        return this.id;
    }

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

    @Column(name="OTHER_STUFF", nullable=false, precision=22, scale=0)
    public BigDecimal getOtherStuff() {
        return this.otherStuff;
    }

    public void setOtherStuff(BigDecimal otherStuff) {
        this.otherStuff = otherStuff;
    }

}

MyModelId.java:

@XmlRootElement
@Embeddable
public class MyModelId implements java.io.Serializable {

    private BigDecimal idPart1;
    private String idPart2;

    public MyModelId() {
    }

    public MyModelId(BigDecimal idPart1, String idPart2) {
       this.idPart1 = idPart1;
       this.idPart2 = idPart2;
    }

    @Column(name="ID_PART1", nullable=false, precision=22, scale=0)
    public BigDecimal getIdPart1() {
        return this.idPart1;
    }

    public void setIdPart1(BigDecimal idPart1) {
        this.idPart1 = idPart1;
    }

    @Column(name="ID_PART2", nullable=false, length=240)
    public String getIdPart2() {
        return this.idPart2;
    }

    public void setIdPart2(String idPart2) {
        this.idPart2 = idPart2;
    }

   public boolean equals(Object other) {
         if ( (this == other ) ) return true;
         if ( (other == null ) ) return false;
         if ( !(other instanceof MyModelId) ) return false;
         MyModelId castOther = ( MyModelId ) other; 

         return ( (this.getIdPart1()==castOther.getIdPart1()) || ( this.getIdPart1()!=null && castOther.getIdPart1()!=null && this.getIdPart1().equals(castOther.getIdPart1()) ) )
 && ( (this.getIdPart2()==castOther.getIdPart2()) || ( this.getIdPart2()!=null && castOther.getIdPart2()!=null && this.getIdPart2().equals(castOther.getIdPart2()) ) );
   }

   public int hashCode() {
         int result = 17;

         result = 37 * result + ( getIdPart1() == null ? 0 : this.getIdPart1().hashCode() );
         result = 37 * result + ( getIdPart2() == null ? 0 : this.getIdPart2().hashCode() );
         return result;
   }   

}

解决方案

The following works

def id
id = new MyModelId()
bindData(id,request.XML.id)
MyModel model = MyModel.get(id)
bindData(model,request.XML)

这篇关于如何使用包含嵌套类的请求XML在grails中将数据绑定到bindData的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！