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POJava Primefaces how to work with elements placed in dataTable column header
 

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    <p>When "selectOneMenu" is placed in the "dataTable" column header it: 1) triggers row sorting everytime it is opened or after the button next to it is clicked and "selectOneMenu" is opened (it shouldn't be like that); 2) fails to assign value to the backing bean. How can "selectOneMenu" be attached to the column header so that these problems wouldn't occur?</p> <p>*.xhtml code with dataTable which causes 1) and 2) problems:</p> <pre><code>&lt;h:form id="someForm0"&gt; &lt;p:dataTable id="sdt" var="variable" value="#{otherBean.tableModel}" rows="10"&gt; &lt;p:column sortBy="#{variable.name}" filterBy="#{variable.name}" filterMatchMode="contains" &gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Name"/&gt; &lt;h:panelGrid columns="2" cellpadding="1"&gt; &lt;p:selectOneMenu id="abc" value="#{userBean.someChars}"&gt; &lt;f:selectItem itemLabel="" itemValue="select" /&gt; &lt;f:selectItem itemLabel="AAA" itemValue="AAA" /&gt; &lt;f:selectItem itemLabel="BBB" itemValue="BBB" /&gt; &lt;f:selectItem itemLabel="CCC" itemValue="CCC" /&gt; &lt;/p:selectOneMenu&gt; &lt;h:commandButton id="btn" value="Submit" type="submit" action="#{userBean.submitChars}"/&gt; &lt;/h:panelGrid&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{variable.name}"/&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; &lt;/h:form&gt; </code></pre> <p>Backing bean code:</p> <pre><code>@ManagedBean public class UserBean { private String someChars; public String getSomeChars() { return someChars; } public void setSomeChars(String someChars) { this.someChars = someChars; } public String submitChars() { if(getSomeChars() != null) { System.out.println("Selected chars are: " + getSomeChars()); } else { System.out.println("Selected chars are equal to null!"); } return null; } } </code></pre> <p>Here is fragment of the previously mentioned *.xhtml code, and selectOneMenu works just great when placed into the basic form:</p> <pre><code>&lt;h:form id="someForm"&gt; &lt;p:selectOneMenu id="abc" value="#{userBean.someChars}"&gt; &lt;f:selectItem itemLabel="" itemValue="select" /&gt; &lt;f:selectItem itemLabel="AAA" itemValue="AAA" /&gt; &lt;f:selectItem itemLabel="BBB" itemValue="BBB" /&gt; &lt;f:selectItem itemLabel="CCC" itemValue="CCC" /&gt; &lt;/p:selectOneMenu&gt; &lt;h:commandButton id="btn" value="Submit" type="submit" action="#{userBean.submitChars}"/&gt; &lt;/h:form&gt; </code></pre> <p>I think the last resort would be adding elements from the dataTable column header to the dataTable header:</p> <pre><code>&lt;h:form id="someForm1"&gt; &lt;p:dataTable id="sdt" var="variable" value="#{otherBean.tableModel}" rows="10"&gt; &lt;f:facet name="header"&gt; &lt;h:panelGrid columns="2" cellpadding="1"&gt; &lt;p:selectOneMenu id="abc" value="#{userBean.someChars}"&gt; &lt;f:selectItem itemLabel="" itemValue="select" /&gt; &lt;f:selectItem itemLabel="AAA" itemValue="AAA" /&gt; &lt;f:selectItem itemLabel="BBB" itemValue="BBB" /&gt; &lt;f:selectItem itemLabel="CCC" itemValue="CCC" /&gt; &lt;/p:selectOneMenu&gt; &lt;h:commandButton id="btn" value="Submit" type="submit" action="#{userBean.submitChars}"/&gt; &lt;/h:panelGrid&gt; &lt;/f:facet&gt; &lt;p:column sortBy="#{variable.name}" filterBy="#{variable.name}" filterMatchMode="contains" &gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Name"/&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{variable.name}"/&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; &lt;/h:form&gt; </code></pre>
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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.

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