why do you delete the cookies ?
2008/5/8 lebenski <[EMAIL PROTECTED]>:
>
> Hi guys,
>
> Ok i've got an urgent problem. I'm using tapestry to develop a web app,
> which I have to present tomorrow to some very important people!
>
> I've got a very frustrating problem. I will try to explain it as clearly
> as
> possible.
>
> I'm using the t5components/OnEvent Mixin to call back to Tapestry
> 'onChange'
> of a textfield.
>
> TML:
>
> <t:form t:id="registerBasicForm" t:class="gamesysForm"
> zone="registerBasicZone">
> ....
> <t:label for="registerbasic_userName">
> User Name:
> </t:label>
> <t:textfield t:id="registerbasic_userName"
> t:value="userName"
> event="change" onfocus="showFieldHint('4-16
> characters');showFieldError('registerbasic_userName');"/>
>
> ....
> </t:form>
>
> Page Class:
>
> @Component(id = "registerbasic_userName", parameters = { "event=change",
> "onCompleteCallback=checkForServerValidationErrors"
> })
> @Mixins("t5components/OnEvent")
> private TextField userNameField;
>
> ...
>
> @OnEvent(component = "registerbasic_userName", value = "change")
> public JSONObject onChangeFromUserName(String value) {
> System.out.println("onChangeFromUserName");
> JSONObject json = new JSONObject();
> Boolean userNameExists = false;
>
> Pattern p =
> Pattern.compile(messages.get("alphanumeric-regex"));
> Matcher m = p.matcher(value);
> boolean validUserName = m.find();
>
> if (validUserName) {
> try {
> userNameExists =
> hydraService.userNameExists(value);
> } catch (ServiceFaultException x) {
> logger.error("----fault : " +
> x.getFault().getMessage());
> } catch (ServiceProblemException x) {
> logger.error("----problem:" + x);
> }
>
> if (userNameExists) {
> json.put("error", "true");
> json
> .append("message",
> "Username " + value
> + " is
> taken");
> } else {
> json.put("error", "false");
> json.append("message", "");
> }
>
> } else {
> json.put("error", "true");
> json.append("message", "Field contains invalid
> characters");
> }
>
> json.append("submitid", "submitRegisterBasic");
> json.append("field", "registerbasic_userName");
> System.out.println(json.get("error") + " " +
> json.get("field") + " "
> + json.get("message"));
>
> return json;
> }
>
> Javascript:
>
> function checkForServerValidationErrors(response){
>
> var json = response.evalJSON();
> var elementId = json.field.toString();
>
> //This MUST be done first
> performTypeValidation(elementId);
>
> if (json!=null && json.error == 'true' &&
> formErrors[elementId]==null)
> {
> addFormValidationError(elementId,json.message);
> }
>
>
> processValidationErrors(elementId,json.submitid.toString());
> }
>
> So, what happens is, when the user types a value into 'userName', and
> exits
> the field (onChange seems to act like onBlur), it calls back to Tapestry
> which executes the onChangeFromUserName(String value) method to check if
> the
> username exists in the database. This then calls back to the javascript
> function (defined in the Component annotation) with a JSON object. The
> javascript is used for client side validation/presentational stuff.
>
> This all works fine under normal conditions. HOWEVER, when I clear my
> cookies and do the same action (type a value into 'username' and tab out),
> i
> get a javascript error 'json.field has no properties'. The server side
> method (onChangeFromUserName) isn't getting called (I can tell because it
> doesnt hit System.out.println("onChangeFromUserName");), BUT it is calling
> back to the javascript function. Rightly so, the javascript is
> complaining
> because the JSON object hasn't been passed in.
>
> 2 cookies are getting set, JSESSIONID and UTRACK, and they do get sent
> both
> on the initial request (right after i've cleared my cookies) and the
> request
> after. But for some reason, i'm not hitting the server method on the
> initial request.
>
> I have used tamper data to analyse both requests and they appear to be
> identical. Both cookies are getting sent, all the headers are identical.
>
> I am at a real loss and starting to panic about this. I'm starting to
> think
> that Tapestry needs a request to properly set up the session, before you
> can
> actually call back to it, but this is only a hunch.
>
> I really need to get this sorted, if you have any ideas then please help!
> --
> View this message in context:
> http://www.nabble.com/T5%3A-Urgent-Problem.-After-clearing-cookies-communication-between-client-and-tapestry-breaks-on-first-request-tp17123771p17123771.html
> Sent from the Tapestry - User mailing list archive at Nabble.com.
>
>
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>
--
with regards
Sven Homburg
http://tapestry5-components.googlecode.com
