问题
I have classes hierarchy in JAVA that should be available through a rest API for an angularJS SPA application (the data persisted in PostgreSQL DB)
the classes hierarchy looks as follows:
- PERSON BASE ABSTRACT CLASS contains name and and age
- CHILD EXTENDS PERSON contains favorite TV show
- PARENT EXTENDS PERSON contains a list of children
- GRANDPARENT EXTENDS PERSON contains a list of parents
The UI looks like an hierarchy tree, where you can view all the data and edit it.
I could thought of three ways to model this:
- one endpoint with hierarchy /grandparent:id/parents:id/children:id
example
POST /grandparent/1/parents/2/children
in order to create a new child
PROS: more readable, more restful CONS: complex to implement, when I edit a child, I don't care about all the hierarchy at most I need the direct parent in order to create it, but for editing, child ID will be sufficient to find the it in the DB
- three endpoints : /grandparents:id, /parents:id, /children:id
POST /children?parentID=2
PROS: ? CONS: a lot of duplication
3.one endpoint /people (in the request/response JSON, use type field to denote the class and a parentID field.
POST /people { name .. type : child parentId : 2 }
PROS: more polymorphic CONS: less restful?
what do you think?
回答1:
I think you should just have a 'people' endpoint, and a 'person' endpoint.
The people endpoint would return a list of person_ids fitting a criteria. For instance 'has_children' = true would return all parents. 'has_parents' = false would return all test tube babies, etc etc etc.
The 'person' endpoint would return details about the specific person, given a specific id. Here you would see eye color, gender, a list of children person_ids, a list of parent person_ids, perhaps a list of grandchildrens person_id. Any other details about the person would be here.
You might want to consider refactoring the Java code if the extended classes don't add any significant functionality that you couldn't get simply from a person class.
Essentially you are dealing with person 'nodes' here.
Check out Graph Commons API maybe much of your work is done for you.
来源：https://stackoverflow.com/questions/38797797/rest-api-and-polymorphism