ViewParam vs @ManagedProperty(value = “#{param.id}”)

<f:viewParam>: Sets the value during update model values phase only (since it extends UIInput). The set value is not available during @PostConstruct, so you need an additional <f:event type=”preRenderView” listener=”#{bean.init}” /> inside the <f:metadata> to do initialization/preloading based on the set values. Since JSF 2.2 you could use <f:viewAction> for that instead. Allows for nested … Read more

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