Enforce allocatedFromIds and allocatedToIds

Overview

Allocations and transfers to/from budgets from another budget should be restricted by the fund.allocatedToIds and fund.allocatedFromIds fields in the funds associated with the budgets involved.

Example

Given the following funds:

• HIST allocatedTo: [CANHIST, LATHIST], allocatedFrom: []
• CANHIST allocatedFrom: [HIST], allocatedTo: []
• LATHIST allocatedFrom: [], allocatedTo: []

Transfers/Allocations to/from budgets associated with these funds should be restricted as follows:

• HIST -> CANHIST should be allowed
• HIST -> LATHIST should not be allowed since LATHIST doesn't have HIST in allocatedFrom.
• CANHIST -> (any budgets) should not be allowed
• LATHIST <-> (any budgets) should not be allowed
• LATHIST <- (no fromFundId specified) should be allowed - allocation only.

If an allocation or transfer is disallowed, an appropriate error response should be returned.

It's possible to allocated to or from a budget from "nowhere" so to speak... i.e. not to/from another budget but from outside the system. Transfers are always between budgets so this statement doesn't apply to transfers.

Acceptance Criteria

• Transfers/allocations between budgets should be restricted as described above
• unit tests are updated
• api tests are updated