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unpix
unpix

Reputation: 853

Get the validation message for a specific component

<h:inputText id="myInputText"
             title="The text from validation message here"
             style="#{component.valid? '' : 'border-color:red'}"
             validator="#{MyBean.validate}"
             required="true"
             requiredMessage="required"
             value="#{MyBean.value} />
<p:message for="myInputText" display="text"/>

Since I want to custom the looking for a failed validation in an inputText compoment and I know that it is possible to know whether the component was successfully validated or not, I would like to know if it is viable and how I can get the validation message, in order to display it as the tittle of my inputText component.

Upvotes: 3

Views: 1971

Answers (2)

kolossus
kolossus

Reputation: 20691

The problem you will have with what you're planning is that a single component can have more than one message queued. What are you going to do then? For demonstration purposes, you can use

<h:inputText id="myInputText"
             title="#{facesContext.getMessageList('myInputText').get(0)}"
             style="#{component.valid ? '' : 'border-color:red'}"
             validator="#{MyBean.validate}"
             required="true"
             requiredMessage="required"
             value="#{MyBean.value}" />

EDIT : You should just move the logic into your backing bean:

  1. Implement a method that'll pull the detail from an available FacesMessage list, given a clientId

    public String getComponentMessageDetail(String clientId) {
    String detail = null;
    FacesContext ctxt = FacesContext.getCurrentInstance();
    List<FacesMessage> componentMessages = ctxt.getMessages(clientId);

    if (componentMessages != null && componentMessages.isEmpty() == false) {
        //returns the detail, from only the first message!
        detail = componentMessages.get(0).getDetail();
    }

    return detail;
}

  2. Use the utility method in your view

     <h:inputText id="myInputText"
              title="#{MyBean.getComponentMessageDetail('myInputText')}"
              style="#{component.valid ? '' : 'border-color:red'}"
              validator="#{MyBean.validate}"
              required="true"
              requiredMessage="required"
              value="#{MyBean.value}" />

Upvotes: 5

woodz
woodz

Reputation: 817

How about this java method

public String getComponentMessageDetail(String cid){
  FacesContext ctxt  =  FacesContext.getCurrentInstance();
  Iterator<FacesMessage> cm = ctxt.getMessages(cid);
  List<String> msg = new ArrayList<>();
  while(cm.hasNext()) {
    msg.add(cm.next().getDetail());
  }
  return String.join(" | ", msg);
}

to show everything what's in the message cache?

Also in xhtml

<h:inputText id="myInputText" title="#{MyBean.getComponentMessageDetail('yourFormId:myInputText'}" style="#{component.valid? '' : 'border-color:red'}" validator="#{MyBean.validate}" required="true" requiredMessage="required" value="#{MyBean.value} />

it might be useful to put the name of your form-id in front of the input control's id. Otherwise the message list might have zero items, although there are some.

Here is another way to quickly show validation messages: h:messages

Upvotes: 0

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