Validate Email Existance

[wingman]

Hi i want to validate the email on server side, how to validate whether the email present in the db, if present show error message.

and i want to accomplish this before submitting submit button.

Here is my sample page...........

<div id="jskLogin">

<rich:panel>

<h:form id="fom1">

    <h:panelGrid columns="3">

        <h:outputText value="Email:"/>

        <h:inputText  value="#{userBean.email}" id="email" required="true">

        <rich:validator/>

        </h:inputText>

        <h:message for="email"/>

        <h:outputText value="Password:"/>

        <h:inputText  value="#{userBean.password}" id="password">

        <rich:validator/>

        </h:inputText>

        <h:message for="password"/>

    </h:panelGrid>

    <h:commandButton value="Register" action="#{userBean.save}"/>

</h:form>

</rich:panel>

</div>

Managed Bean..............

@ManagedBean(name = "userBean")

@RequestScoped

public class UserBean implements Cloneable{

          @Size(min = 3, max = 32, message = "UserName is required")

    private String userName;

          @Size(min = 3, max = 32, message = "Email is required")

    private String email;

//getters/setters

can any one post sample code............

thanks in advance

[sivaprasad9394]

Hi Boby,

Using ajax u can validate it like below,

<a4j:region>

                <h:panelGrid columns="5" border="0"

                    columnClasses="fieldLabel,fieldColon,fieldData,fieldError,fieldErrorNone">

                    <h:outputText value="#{msg.username}" />

                    <h:outputText value=":" />

                    <h:inputText id="emailField1" value="#urBean.Email}"

                        required="true" requiredMessage="#{msg.requiredField}"  styleClass="cel"

                        validatorMessage="#{msg.emailLengthMessage}"

                        size="28"

                        maxlength="15">

                        <f:validateLength  minimum="#{msg.emailMin}" maximum="#{msg.emailMax}">                           

                        </f:validateLength>                      

                    <a4j:support event="onblur" actionListener="#{urBean.emailActionListener}"

                        reRender="p_emailField,eemailField" limitToList="true" />

                    </h:inputText>

                    <h:outputText value="*" id ="erroremailField"/>

                    <a4j:outputPanel id="p_emailField" >

                        <h:message id="eemailField"  for="emailField1" />

                    </a4j:outputPanel>

                </h:panelGrid>

</a4j:region>

public void emailActionListener(ActionEvent event) {

    log.info("Entering emailActionListener method()......");

    Login login = new Login();

    try

    {

      if (this.selectedUser != null)

      {

        ********** here check ur email with database you have already email existing or not ****************

        if (lst.size() > 0) {

          FacesContext faceContext = FacesContext.getCurrentInstance(); //Instead of doing like this create some boolean variable with false and set as true inside this method

          FacesMessage facesMessage = new FacesMessage();//if email already exist in the DB means and just render the <h:output text in the screen with color red.

          facesMessage.setSeverity(FacesMessage.SEVERITY_ERROR); // it shows like error in the screen.       

          facesMessage.setDetail(this.Resources.getString("emailExist"));

          facesMessage.setSummary(this.Resources.getString("emailExist"));

          faceContext.addMessage("mainInclude:userAddAloneView:pageForm:emailField", facesMessage);

        }

      }

    }

    catch (Exception ex)

    {

      ex.printStackTrace();

    }

  }

If you are using richfaces 4 you can alter the code as u like using a4j:ajax and execute ...i hope it works.

Thanks and Regards,

Siva