Improvements to working with Business Units in the GraphQL API

We have made several improvements and changes to the Business Units functionality in GraphQL:

• Carts and Orders now support Reference Expansion on Business Unit.
• Added support for creating Carts that reference a Business Unit.
• Changed the naming of the type AssociateRole to free up the namespace for new functionality.

Changes:

• [GraphQL API] Changed the Cart type:
  • Added the businessUnitRef field to the Cart type.
  • Cart.businessUnit field type changed from KeyReference to BusinessUnit
• [GraphQL API] Changed the Order type:
  • Order.businessUnit field type changed from KeyReference to BusinessUnit
  • Added the businessUnitRef field to the Order type.
• [GraphQL API] Changed the CartDraft type:
  • Input field businessUnit was added to CartDraft type
• [GraphQL API] Changed the MyCartDraft type:
  • Input field businessUnit was added to MyCartDraft type
• [GraphQL API] Added the following types to the GraphQL schema: SimpleAssociateRole
• [GraphQL API] Removed the following types from the GraphQL schema: AssociateRole.
• [GraphQL API] Changed the Associate type:
  • Associate.roles field type changed from [AssociateRole!]! to [SimpleAssociateRole!]!
• [GraphQL API] Changed the AssociateDraft type:
  • AssociateDraft.roles input field type changed from [AssociateRole!]! to [SimpleAssociateRole!]!

The following changes were introduced in terms of GraphQL SDL:

extend type Cart {
  businessUnitRef: KeyReference
}

extend type Order {
  businessUnitRef: KeyReference
}

extend input MyCartDraft {
  businessUnit: ResourceIdentifierInput
}
extend input CartDraft {
  businessUnit: ResourceIdentifierInput
}

"BETA: This feature can be subject to change and should be used carefully in production. https://docs.commercetools.com/api/contract#public-beta"
enum SimpleAssociateRole {
  Admin
  Buyer
}