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POdataTable sortBy function does not work(primefaces)
 

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  1. POdataTable sortBy function does not work(primefaces)
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    <p>I have a problem with the primefaces dataTable component. I dont know why it does not short the data in the table when i click on it. </p> <pre><code>&lt;p:dataTable var="garbage" value="#{resultsController.allGarbage}" dynamic="true" paginator="true" paginatorPosition="bottom" rows="10" paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}" rowsPerPageTemplate="5,10,15"&gt; &lt;p:column sortBy="#{garbage[0].filename}"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Filename" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{garbage[0]}" /&gt; &lt;/p:column&gt; &lt;p:column&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Description" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{garbage[1]}" /&gt; &lt;/p:column&gt; &lt;p:column sortBy="#{garbage[2].uploadDate}"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Upload date" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{garbage[2]}" /&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; </code></pre> <p>This is the managed bean</p> <pre><code>@ManagedBean @RequestScoped public class ResultsController { @EJB private ISearchEJB searchEJB; private Garbage[] garbage; public List&lt;Garbage[]&gt; getAllGarbage() { return searchEJB.findAllGarbage(); } public Garbage[] getGarbage() { System.out.println("VALUES!!!!!!!!" + garbage[0].getFilename()); return garbage; } public void setGarbage(Garbage[] garbage) { this.garbage = garbage; } </code></pre> <p>}</p> <p>This is the EJB that allows data access</p> <pre><code>@Stateless(name = "ejbs/SearchEJB") </code></pre> <p>public class SearchEJB implements ISearchEJB {</p> <pre><code>@PersistenceContext private EntityManager em; public List&lt;Garbage[]&gt; findAllGarbage() { Query query = em.createNamedQuery("findAllGarbage"); return query.getResultList(); } </code></pre> <p>}</p> <p>And this is the entity(Data representation)</p> <pre><code>@NamedQuery(name = "findAllGarbage", query = "SELECT g.filename, g.description, g.uploadDate FROM Garbage g;") @Entity public class Garbage { @Id @GeneratedValue @Column(nullable = false) private Long id; @Column(nullable = false) private String filename; @Column(nullable = false) private String fileType; @Column(nullable = false) private String uploadDate; @Column(nullable = false) private String destroyDate; @Lob @Column(nullable = false) private byte[] file; @Column(nullable = false) private String description; ...//Getters and Setters </code></pre> <p>As shown in the image there is no changes when the sort buttons are clicked: <img src="https://i.stack.imgur.com/dDsir.png" alt="enter image description here"></p> <p>This is what the console says:</p> <blockquote> <p>SEVERE: Error in sorting</p> </blockquote> <p><b>UPDATE</b></p> <pre><code>public List&lt;Garbage&gt; findAllGarbage() { Query query = em.createNamedQuery("findAllGarbage"); List&lt;Garbage&gt; gList = new ArrayList(); for (Object o: query.getResultList()) { Garbage tmpG = new Garbage(); tmpG.setFilename(((Garbage) o).getFilename()); tmpG.setUploadDate(((Garbage) o).getUploadDate()); tmpG.setDescription(((Garbage) o).getDescription()); gList.add(tmpG); } return gList; } </code></pre> <p>The modified managed bean</p> <pre><code>@ManagedBean @RequestScoped public class ResultsController { @EJB private ISearchEJB searchEJB; private Garbage garbage; public List&lt;Garbage&gt; getAllGarbage() { return searchEJB.findAllGarbage(); } public Garbage getGarbage() { return garbage; } public void setGarbage(Garbage garbage) { this.garbage = garbage; } </code></pre> <p>}</p> <p>The modified JSF</p> <pre><code>&lt;p:dataTable var="garbage" value="#{resultsController.allGarbage}" dynamic="true" paginator="true" paginatorPosition="bottom" rows="10" paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}" rowsPerPageTemplate="5,10,15"&gt; &lt;p:column sortBy="#{garbage.filename}" parser="string"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Filename" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{garbage.filename}" /&gt; &lt;/p:column&gt; &lt;p:column&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Description" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{garbage.description}" /&gt; &lt;/p:column&gt; &lt;p:column sortBy="#{garbage.uploadDate}" parser="string"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Upload date" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{garbage.uploadDate}" /&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; </code></pre>
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    1. COI don't get what you are trying to do. You have a list of arrays and your table would print a String representation of a Garbage instance into every cell. A bit more info about your data structure would help (maybe).
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    2. COI just updated and added how the EJB looks like, and also the Entity Garbage. I hope that can help you understand. Do i need to add any script tag on my head tag maybe? I dont understand why it is not working.
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    3. COI found something interesting at this guide in page 94 web-cinema.googlecode.com/files/primefaces_users_guide_140210.pdf It is the primefaces guide. It says that if my datatable is dynamic i should add parser=”string” attribute to the column. I did it but it didnt fix the SEVERE: Error in Sorting thing. I have no clue what is making that sorting error.
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