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changes.mady.by.user Arpit Singh

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changes.mady.by.user Arpit Singh

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Issue

Notes 

Decision

1Add or Delete leaves (optional leaves) handle as UPDATE or ADD/DELETE ?

The delta report proposed follows the Json Patch format of representing the differences between 2 json. Going by the general convention, referring RFC-6902:

  • Add: If the target location in the source document specifies an object member that does not already exist, and a new member is added to the object, then its an add operation
  • Remove: if the target location in the source document already had a member and the member was removed from the target document then its remove operation
  • Replace/Update: If the target location specifies an object member that does exist, and that member's value is replaced, then its a replace operation
  • Here target location is equivalent to the path of particular leaf
  • So, there it should be Add/Delete.
  • Discussed in detail below
Add/Delete as per notes on the left
2How to handle multiple changes at different levels?
Example: 
  • if you compare multiple levels and say a grandchild of a the node you are comparing has been added or deleted is that an UPDATE  or just a ADD/DELETE at that level

There could be Many more complex scenarios....

Replied below


3More scenarios need to be explored and documented in detail. Such as handling arrays within a json, handling child/grandchild changes.

CPS Delta feature Exceptions

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