Technical Overview: Form Storage -- Eval

This form storage mechanism is present in version >= 4.0.3.

Form Storage Options

The options specifying a php-eval storage for $form are stored at:

/modules/forms/forms/$form/storage_options/eval

It has the following structure:

• records: The function to call to get the list of available records/form ids. As of version 4.2, the variable $mod_time, if non-negative, should be checked to retrieve only the records changed since a given time.
• parent: optional parent node
  • populate: optional scalar node. if set, it is the php code used to get the parent id of the current id. the current id can be accessed as $id
• fields: optional parent node containing a sub node for each field indexed by the $fieldName
  • $fieldName: optional parent node
    • populate: optional scalar node. if set, it is the php code used to get the db-value of the field for the current id. the current id can be accessed as $id