You can use the following piece of code: private static final String
ECO_FRIENDLY_ATTRIBUTE = "eco_friendly"; @PostConstruct public void
initModel() { productRetriever = productTeaser.getProductRetriever(); if
(productRetriever != null) { productRetriever.extendProductQueryWith(p
-> p .createdAt() .addCustomSimpleField(ECO_FRIENDLY_ATTRIBUTE) ); } }