@RequestScope中的@PostContruct中的JPA查找不会重新加载

Question

我有一个Request Scoped Managed Bean，我在其中执行JPA查找以从数据库填充属性。当我离开页面并对数据库记录进行更改时，它不反映我何时重新访问应该显示更改的页面，即带有@PostContruct的Managed Bean类从数据库加载。

ManagedBean：

@PostConstruct
public void loadCurrentProfile() {
    FacesContext context = FacesContext.getCurrentInstance();
    ExternalContext externalContext = context.getExternalContext();
    Long id = (Long) externalContext.getSessionMap().get("id");
    serviceprovider = em.find(Serviceprovider.class, id);
}

<managed-bean>
    <managed-bean-name>companyProfileBean</managed-bean-name>
    <managed-bean-class>com.suntech.winnoweb.jsfbeans.CompanyProfileBean</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
    <managed-property>
        <property-name>id</property-name>
        <value>#{param.id}</value>
    </managed-property>
</managed-bean>