Creating mapped models

This is a useful tip for avoiding headaches when you are creating models mapped to tables with laminas-db. These models need to implement two methods, that is, exchangeArray and getArrayCopy:

public function exchangeArray($data)

The exchangeArray method is used by the Laminas\Db\ResultSet class to populate a model with data from a table record.

public function getArrayCopy()

The getArrayCopy method is used by the Laminas\Db\ResultSet class to get data from a model. It is also used by Laminas\Form\Form to bind model attribute values to form field values.

In fact, the Laminas\Db\ResultSet class also accepts a toArray method, replacing the getArrayCopy method. I suggest implementing the toArray method in models to extract the data to be persisted with the TableGateway class. Sometimes, the model data to be sent to a form object is different from the model data to be sent to a data mapper. You can show, in an HTML form, data that won’t be saved...