CODEWITHSUNDEEP
jspjsf
ke3pup
ke3pup

Reputation: 1895

Form submission and passing parameters via URL

I have a Window where user can search for all the cars in the database and able to edit the details of the car, when user click the edit button (code below) on a given car the following JavaScript is called to open a New window:

  <!--EDIT BUTTON -->  
  <h:commandLink value=""
        onclick="return CarEditCrud(this);" title="Edit Car">
        <t:graphicImage rendered="true" value="/imgs/edit.gif"
            styleClass="edit" />
        <f:param value="#{car.carPK}" name="carCode" />
    </h:commandLink>

 <!--FUNCTION TO OPEN NEW WINDOW TO EDIT CAR DETAIL -->  
 function CarEditCrud(val) {   
 ....    
 window.open("EditCarCrud.faces?carPK=" + pk);
 }

So new window open with URL of localhost:80/jsp/EditCarCrud.faces?carPK=" + pk (NOTE: PK would be a number like 935533) and in constructor of EditCarCrud Backbean i do the following to retrieve the information of the car and populate the fields:

Map requestMap = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();
String code = (String) requestMap.get("carCode");

That's all good. Problem is this Backbean has Request scope when user press Submit, i lose all that information (carCode) so the URL is now localhost:80/jsp/EditCarCrud.faces.

UPDATE:

Additionally, there is selectOneItem which has

  ....
  valueChangeListener="#{carEditCurd.countrycodechange}"
  onchange="submit()"

Is there a way for me to keep the carCode in the URL as it was when window originally opened with the PK in the URL?

Upvotes: 0

Views: 1039

Answers (1)

BalusC
BalusC

Reputation: 1109402

I assume that you're still using JSF 1.x.

You need to retain the request parameter in the subsequent forms by <f:param>:

<h:commandLink value="Submit" ...>
    <f:param name="carCode" value="#{param.carCode}" />
</h:commandLink>

This does not end up in the URL, but it is available as POST request parameter the usual way. The <managed-property> is by the way a more clean way to let JSF set arbitrary request parameters as bean properties.

An alternative is to add a plain HTML <input type="hidden"> to the form, so that it also get submitted when a dropdown with onchange="submit()" inside the same form get changed:

<input type="hidden" name="carCode" value="<h:outputText value="#{param.carCode}" />" />

(yes, with an ugly <h:outputText> nested as value, it's just to prevent possible XSS attacks)

Note that a <h:inputHidden> is not useable as it loses its value when validation on the form fails.

Upvotes: 3

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