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POPersist many to many with SelectBooleanCheckbox
 

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    <p>My question is similar to <a href="https://stackoverflow.com/questions/10266390/jpa-persist-many-to-many">JPA persist many to many</a></p> <p>But, I have two entities: Roles and Users, with a Many to Many relation, that is represented by rolesusers table. In my application, I'm using JSF 2.0, and I have a form to manipulate User data, and a form with a list of all Roles names and a selectBooleanCheckbox to see the user's roles (checked if yes). Additionally it must have the possibility to add or remove a rol (checking or unchecking the selectBooleanCheckbox), but when I do it, I have two problems:</p> <p>1: To check the role that this user has, I have in the value of the selectBooleanCheckbox this syntax:</p> <p></p> <pre><code>&lt;h:column&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="ASIGNADO"/&gt; &lt;/f:facet&gt; &lt;h:panelGroup rendered="#{usuariosController.selected.rolesList.contains(itemRole)}"&gt; &lt;h:selectBooleanCheckbox value="#{true}"&gt; &lt;f:ajax listener="#{rolesView.selectRoleListener(usuariosController.selected, itemRole)}" render="@form" /&gt; &lt;/h:selectBooleanCheckbox&gt; &lt;/h:panelGroup&gt; &lt;h:panelGroup rendered="#{!usuariosController.selected.rolesList.contains(itemRole)}"&gt; &lt;h:selectBooleanCheckbox value="#{false}"&gt; &lt;f:ajax listener="#{rolesView.selectRoleListener(usuariosController.selected, itemRole)}" render="@form" /&gt; &lt;/h:selectBooleanCheckbox&gt; &lt;/h:panelGroup&gt; &lt;/h:column&gt; </code></pre> <p>But when the <code>selectRoleListener</code> is executed, it throws a <code>javax.faces.component.UpdateModelException /users.xhtml @224,102 value="#{true}": Illegal Syntax for Set Operation</code>.</p> <p>2: If I remove the <code>value="#{true}"</code> and replace it with <code>value="true"</code>, the checkbox is not selected when the user has the role specified in list, but it seems the selectRoleListener is executed, but the changes are not visible in data base.</p> <p>Can you help me with this case? I hope you understood me.</p> <p>Thank you!</p>
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    1. COThis is not the right usage of checkboxes in JSF. First of all, is there a specific reason why you use a `<h:dataTable><h:selectBooleanCheckbox>` instead of just a `<h:selectManyCheckbox>`?
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    2. CONot really. It's just for manipulate the Roles list (for all roles in Roles table). But I had not thought it
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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.

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