Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>JSF creates bean instances called managed beans, which you can call from your pages using <code>#{}</code> wrapped expressions, also called <a href="http://docs.oracle.com/javaee/6/tutorial/doc/gjddd.html" rel="nofollow">EL expressions</a>. <code>#{timeBean.time}</code> is actually invoking <code>getTime()</code> getter from <code>timeBean</code> instance. Bean instances are referred by default with classes simple name with their first character lowercased.</p> <p>So having this bean:</p> <pre><code>@ManagedBean @RequestScoped public class TimeBean{ public Date getTime(){ return new Date(); } } </code></pre> <p>With <code>@ManagedBean</code> annotation we tell JSF that it need to be managed by it. With <code>@RequestScoped</code> we're expressing the scope of the bean, actually JSF will create one bean instance per browser request and will call <code>getTime()</code> getter method, each time you specify it in your page.</p> <p>For form fields, you must specify a variable which has both getter and setter methods. That's because JSF will <strong>set</strong> that value when form is processed.</p> <pre><code>@ManagedBean @RequestScoped public class TimeFormBean{ //Initializes time with current time when bean is constructed private Date time = new Date(); public Date getTime(){ //No logic here, just return the field return time; } public void setTime(Date d){ time=d; } public void processTime(){ System.out.println("Time processed: " + time); } } </code></pre> <p>Then you can use it in form inputs that way:</p> <pre class="lang-xml prettyprint-override"><code>&lt;h:form&gt; &lt;h:inputText value="#{timeFormBean.time}"&gt; &lt;f:convertDateTime pattern="yyyy-MM-dd"/&gt; &lt;/h:inputText&gt; &lt;h:commandButton value="process" action="#{timeFormBean.processTime}" /&gt; &lt;/h:form&gt; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POJSF value expressions and beans, how do they work?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USXtreme Biker
    1. USXtreme Biker
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POJSF value expressions and beans, how do they work?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COYou're missing that this is a deferred expression which means it can also invoke the setter when submitting the form.
      singulars
      1. PO
      1. USLuiggi Mendoza
    2. COTrue! However he didn't even mention the 'form' word in his question.
      singulars
      1. PO
      1. USXtreme Biker
    3. COYes but probably OP haven't even read that part yet. Still, IMO we must provide exact info and not just part of it.
      singulars
      1. PO
      1. USLuiggi Mendoza
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload