Parent/childs behaviors are one of the most powerful and time saving feature of APIgoat. It helps you build comprehensive interface without coding.
A parent/childs relationship is a way to define that one entry (parent) will be holding a set (collection) of entries from a different model (childs).
An example of that would be Person and Addresses. The parent Person will be holding a collection of 0 to infinite possible addresses.
APIgoat will build interfaces to take care of this case by adding a list of addresses at the bottom of the Person form.
The many-to-many relationship is also supported.