Validation Error in whtml with map value entry

Question

I would like to show the element of the HashMap in a xhtml page (with jsf):

  <h:selectOneMenu id="elt" value="#{mgbean.elt}">
                       <c:forEach var="entry" items="#{mgbean.map}">
                            <f:selectItem itemValue="#{entry.key}" itemLabel="#{entry.value}" escape="false" />                            
                       </c:forEach>
     </h:selectOneMenu>

the Map is the following:

map= new LinkedHashMap<String, String>();
                map.put("1", ">=20");
                map.put("2","<20");

I got this error :

PM org.apache.myfaces.lifecycle.RenderResponseExecutor execute WARNING: There are some unhandled FacesMessages, this means not every FacesMessage had a chance to be rendered. These unhandled FacesMessages are: - selectionForm:elt: Validation Error: Value is not valid

i tried to add the following lines but the same error showed

<?xml version="1.0" encoding="UTF-8"?>  

<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head>

how can i fix this error.

UPDATE:

public String elt; with getter and setter.

public Map<String, String> map;


map= new LinkedHashMap<String, String>();
            map.put("1", ">=20");
            map.put("2", "<20");

Maciej Kowalski · Accepted Answer · 2017-03-08T17:39:48.680

0

I think you should opt for f:selectItem, it will take the key as the label and value as.. value:

<h:selectOneMenu id="elt" value="#{mgbean.elt}">
    <f:selectItems value="#{mgbean.map}"/>                            
</h:selectOneMenu>

Update

If you want to manually define whether key or value should be the label then try:

<h:selectOneMenu id="elt" value="#{mgbean.elt}">
     <f:selectItems value="#{mgbean.map.entrySet()}"
         var="entry" itemValue="#{entry.value}" itemLabel="#{entry.key}"/>                            
</h:selectOneMenu>

Also remember that at any given point in time the value contained in the mgbean.elt field must always be one of the keys of your Map. If for some reason you set that value manually to something different that "1" or "2", you might get error as above.

edited Mar 08 '17 at 17:39

answered Mar 08 '17 at 12:22

Maciej Kowalski

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No, the map variable is as defined a LinKedHashMap. By the way i tried to add the entrySet() and it gave me this error org.apache.myfaces.application.viewstate.ServerSideStateCacheImpl serializeView SEVERE: Exiting serializeView - Could not serialize state: java.util.HashMap$Entry java.io.NotSerializableException: java.util.HashMap$Entry – Selma BA Mar 08 '17 at 12:44
try out my updated example – Maciej Kowalski Mar 08 '17 at 12:53
i got the same first error selectionForm:elt: Validation Error: Value is not valid – Selma BA Mar 08 '17 at 14:36
Please add the mgbean code.. especially the 'elt' field – Maciej Kowalski Mar 08 '17 at 15:16
i updated my post , please have a look – Selma BA Mar 08 '17 at 17:28
i have added another update. check it out – Maciej Kowalski Mar 08 '17 at 17:40
thanks a lot! it worked now with your suggestion: – Selma BA Mar 08 '17 at 18:47
Great! Glad I could help – Maciej Kowalski Mar 08 '17 at 18:48

Validation Error in whtml with map value entry

1 Answers1