join two schemas

[tejash-jl]

join two schemas while adding an entity
an entity can refer to another entity being already created

for eg
Teacher
{
"name": "Deepak Rana"
}
assume the osid of this teacher to be 123-123

student can refer to this entity in the following way
Student
{
"name": "Chaitanya Pandit"
"references": "did:Teacher:123-123"
}

when we search for student, the referred entity i.e Teacher will also be returned in response

[Sreejit-K]

@srprasanna @holashchand Here are my observations -

• If the reference doesn't exist in the system it stores and returns it as a string.
• On updating the entity with an existing reference entity it updates and returns the reference entity
• One Issue I found out is the visibility scope - the private fields of the reference entity are getting exposed, this should be handled.
• And also need a round of discussion on

• should it return specific fields of the referred entity? - we can add refernceFeilds to return in the osConfig and make corresponding changes
• or return the whole entity with out the private fields - have to add the filter layer on the reference nodes using the reference entity Type

can you please add your comments on these. Thanks!

[Sreejit-K]

Unable to update the exiting PR linked to this ticket so attaching the new PR here - Sunbird-RC/sunbird-rc-core#277