If NoResultException, then logic in JSF or Java

[saeediqbal1]

In my simple application that i am writing, now i can edit records if a single resultset exist in database, pull it in the form and edit it and click save to modify the contents fine.

Now the problem is that when nothing is returned from that database, for example an activity record for that user, if it doesn't already exist. then i am having a hard time figuring out what to do.

Should i use JSF like in other examples to check if

<s:div rendered="#{reportActivity.value == null}">
 PUT THE FORMS HERE
 </s:div>

... for some reason i'm not sure if the object returned is null even if no row is found but i dont know

if that happens then i put the forms inside the s div tags. and if it is not null then put the forms with value binding in between those s divs at the bottom. Or currently i am playing with creating a new object and putting sample values in it in the .java files. check this

@Create
 public String reportActivity() {
 try {
 value = (Activity) em
 .createQuery(
 "select o from Activity o where o.username = #{identity.username}")
 .getSingleResult();

 }
 catch(javax.persistence.NoResultException ex) {

 value = (Activity) new Activity();
 value.setUsername("#{identity.username}");
 value.setFirstact("Not Available");
 value.setSecondact("Not Available");
 value.setThirdact("Not Available");
 value.setFourthact("Not Available");
 value.setFifthact("Not Available");
 em.persist(value);
 log.info("reportActivity.reportActivity() action called with: #{reportActivity.value}" + getUsername());
 return "failure";
 }

 return "success";
 }

that one is going horribly wrong, it doesn't even pick up the username. and when submitted it enters data in mysql twice 2 rows instead of one and puts in #identity.username instead of the username.

In addition the page flow xml file seems to not work properly either. When my method above should return failure it should go to a different page but it doesnt.

see

<page view-id="/reportActivity.xhtml" login-required="true">
 <navigation>
 <rule if-outcome="failure">
 <redirect view-id="/ActivityEdit.xhtml"/>
 </rule>
 </navigation>
 <navigation from-action="#{reportActivity.updateActivity}">
 <redirect view-id="/ActivityList.xhtml"/>
 </navigation>
 </page>

what are the best practices for this? I know im still stuck at the basics. sorry

[saeediqbal1]

Well that ActivityEdit.xhtml file is the one that creates a row in database (auto generated by seam-gen with entity)

[saeediqbal1]

Hello

[pmuir]

"saeediqbal1" wrote:

value.setUsername("#{identity.username}");

You can't use EL like this - try injecting identity into the bean using @In.

With your navigation problem - I'm unsure of the precedence order of navigation rules - which takes priority - from-action or from-outcome?

What you are doing sounds reasonable otherwise.

[saeediqbal1]

No that did not work unfortunately.

I think i may need to do that first option i said have a new form inside this code block in the same .xhtml page

<s:div rendered="#{reportActivity.value == null}">
 PUT THE FORMS HERE
 </s:div>

What do you think? or just say that click on this link to enter your new activity? But that would be 2 clicks :( one to get on this page and one to go to next.

i am thinking to make my application more usable.

[pmuir]

What didn't work? What you do is one way to do it - take a look the Seam Application Framework and how it does it...

[saeediqbal1]

Most of the examples i have seen use s:div's rendered tag. I may try something new myself. Thanks Pete