Fields
Each class has fields that define parameters (attributes) of every class instance. Since instances of a class are stored in a dedicated database table, each field defines a single column in this table.
Properties of a field are very similar to properties of a Data Table field. Fields of a class are managed via Fields table.
Pre-Defined Fields
All classes have several pre-defined fields that can, however, be modified or deleted. Here is the list of default fields:
Field Name | Field Type | Field Description |
instance_id | Long | This field contains an auto-generated class instance ID. Once field with this name is mapped to the database, the automatic row identifier generation strategy is used. The instance ID should be never changed since a class instance is first created. |
author | String | Name of Iotellect Server user that has created the instance. |
creation_time | Date | Date/time when the instance was created. |
update_time | Date | Date/time when the instance was last modified. A modification can be a field value change, a life cycle transition, etc. |
class | String | Context path of the class in Iotellect Server. |
created_by | String | Login name (not username) of the user that created the instance. |
updated_by | String | Login name (not username) of the user that last updated the instance. |
 | After adding custom fields, you need to update the parameters of the dashboard element using the edited class. |
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