It is possible to create a relation between objects of two different classes via
For example, we have the class Rating that contains
comment fields. We also have a Movie class. So we can create a record of class Rating that will point to the record of the class Movie via its
_parent_id field, so the
_parent_id field will contain the ID of record from class Movie.
This is not a simple soft link. This is actually a hard link. When you delete the Movie class record then all its children (records of class Rating with
_parent_idfield set to the Movie class record ID) will be automatically deleted as well.
See this request to learn how to create a child custom record.
If you need to retrieve all children, you can retrieve records with the filter