4

我知道这似乎很常见,但我迷失了。在单击assessment.jsf 中的添加按钮时发生。无论如何,我附上了我认为相关的部分。

FWIW,AssessmentType.equals() 在我调试时没有被触发。

提前致谢。

j_idt38:j_idt47:j_idt48: Validation Error: Value is not valid

评估.xhtml:

        <h:form>
            <h:selectOneMenu value="#{assessmentBean.assessmentField}">
                <f:selectItems value="#{assessmentBean.assessment.type.fields}" />
            </h:selectOneMenu>

            <h:commandButton value="Add" action="#{assessmentBean.doAddField}">
                <f:param name="assessmentId"
                    value="#{assessmentBean.assessment.id}" />
            </h:commandButton>
        </h:form>

评估.jsf:

<form id="j_idt38:j_idt47" name="j_idt38:j_idt47" method="post" action="/jsf-web/edit/assessment.jsf" enctype="application/x-www-form-urlencoded"> 
<input type="hidden" name="j_idt38:j_idt47" value="j_idt38:j_idt47" /> 
<select name="j_idt38:j_idt47:j_idt48" size="1">    <option value="1">Presenting Condition</option> 
    <option value="2">Problem Duration</option> 
</select> 
<script type="text/javascript" src="/jsf-web/javax.faces.resource/jsf.js.jsf?ln=javax.faces"></script>
<input type="submit" name="j_idt38:j_idt47:j_idt50" value="Add" onclick="mojarra.jsfcljs(document.getElementById('j_idt38:j_idt47'),{'j_idt38:j_idt47:j_idt50':'j_idt38:j_idt47:j_idt50','assessmentId':'1'},'');return false" /><input type="hidden" name="javax.faces.ViewState" id="javax.faces.ViewState" value="3431661972220941645:6952134510589038883" autocomplete="off" /> 
</form> 

评估类型.java:

import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.validation.constraints.NotNull;

import lombok.Data;

import org.hibernate.envers.Audited;

@Audited
@Data
@Entity
public class AssessmentType implements Comparable<AssessmentType> {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotNull
    private String name;

    @OneToMany( fetch=FetchType.EAGER, cascade = {CascadeType.PERSIST, CascadeType.MERGE}, targetEntity=AssessmentField.class )
    private List<AssessmentField> fields;

    @Override
    public int compareTo(final AssessmentType o) {
        return getId().compareTo(o.getId());
    }

    @Override
    public String toString() {
        return getName();
    }
}

AssessmentFieldConverter.java

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import com.htu.fizio.api.AssessmentFieldManager;
import com.htu.fizio.domain.AssessmentField;

@FacesConverter(forClass = AssessmentField.class)
public class AssessmentFieldConverter implements Converter {

    AssessmentFieldManager<AssessmentField> assessmentFieldManager;

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public Object getAsObject(FacesContext ctx, UIComponent component, String value) {
        try {
            final InitialContext ic = new InitialContext();

            assessmentFieldManager = (AssessmentFieldManager) ic.lookup("fizio/AssessmentFieldManagerImpl/local");

            return assessmentFieldManager.find(Long.valueOf(value));
        } catch (NamingException e) {
            e.printStackTrace();
        }

        return null;
    }

    @Override
    public String getAsString(FacesContext ctx, UIComponent component, Object value) {
        return String.valueOf(((AssessmentField) value).getId());
    }
}

评估Bean.java

    import java.util.List;

    import javax.annotation.PostConstruct;
    import javax.ejb.EJB;
    import javax.faces.bean.ManagedBean;
    import javax.faces.bean.ManagedProperty;
    import javax.faces.bean.SessionScoped;

    import lombok.Getter;
    import lombok.Setter;

    import com.htu.fizio.api.AssessmentManager;
    import com.htu.fizio.domain.Assessment;
    import com.htu.fizio.domain.AssessmentField;
    import com.htu.fizio.domain.AssessmentFieldValue;
    import com.htu.fizio.jsf.faces.FacesUtil;

...    

@PostConstruct
public void init() {
    if (FacesUtil.containsKey("assessmentId")) {
        final Long id = Long.parseLong(FacesUtil.get("assessmentId"));

        assessment = assessmentManager.find(id);
    } else {
        assessment = new Assessment();
    }
}

    public String doAddField() {
        final AssessmentFieldValue value = new AssessmentFieldValue();

        value.setField(assessmentField);
        value.setValue("");

        assessment.getFieldValues().add(value);

        assessmentManager.save(assessment);

        return "/edit/assessment";
    }

编辑:

刚刚在调试时注意到这一点,这可能是嫌疑人吗?:

Daemon Thread [HandshakeCompletedNotify-Thread] (Suspended (exception ConcurrentModificationException)) 
    HashMap$EntryIterator(HashMap$HashIterator<E>).nextEntry() line: 793    
    HashMap$EntryIterator.next() line: 834  
    HashMap$EntryIterator.next() line: 832  
    SSLSocketImpl$NotifyHandshakeThread.run() line: 2214    
4

3 回答 3

15

验证错误:值无效

确切地说,此错误意味着所选项目与列表中的任何可用项目都不匹配。true即,由选定项值表示的对象在其调用中从未返回equals()任何可用的选定项。

这个问题只有两个原因:

  1. equals()有问题的对象类型的方法被破坏了。
  2. 项目列表的内容在表单提交请求的验证阶段与在显示表单的初始请求的呈现响应阶段不同。

由于第一个似乎已正确实施-根据评论-,剩下的唯一原因是第二个。假设您在 getter 方法中无处执行业务逻辑,一个简单的测试是将其放在#{assessmentBean}会话范围内。如果可行,那么选择项列表的数据(预)加载逻辑肯定是错误的。

于 2011-06-13T11:30:52.470 回答
5

验证失败是因为在您的转换器将 AssessmentType 的字符串表示形式转换回一个对象后,JSF 迭代现有值 ( assessmentBean.assessment.type.fields) 并将这个最近转换的对象与所有现有的对象进行比较。

由于您没有Object#equals为 AssessmentType 实现,因此它将默认为对象身份比较(粗略地说,您的对象的内存地址),这当然会失败。

因此,解决方案是要么实现Object#equals,要么让转换器从 fromassessmentBean.assessment.type.fields而不是 from获取对象AssessmentTypeManager

于 2011-06-12T20:19:51.027 回答
2

我想我已经解决了这个问题,至少,我已经转向下一个错误!

尽管发布了大量代码,但我没有发布包含多个嵌套表单标签的完整 xhtml。只有一种形式似乎允许传递assessmentId 参数,这反过来又允许AssessmentBean 正确填充评估类型的AssessmentFields 列表。

感谢所有的帮助。

于 2011-06-14T22:29:45.473 回答