proposal: a create-from is guarded by the source's status - #64
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A generates create-from runs whenever it is invoked, as often as it is invoked - so a sourceStatus completion hook flips the source and the button goes on being offered on the flipped record, minting a second document from a source that can produce only one. Proposes fromStatus: on a create-from (the transitions from:, spelled differently because from: already names the source entity), and derives the implied guard from a declared sourceStatus so an existing model is corrected without an authoring change.
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Proposal
0032-create-from-guarded-by-source-status.md. Implementation: eclipse-dirigible/dirigible#7068.A
generatescreate-from runs whenever it is invoked, as often as it is invoked. That is right for an action a user may repeat and wrong for the flow the construct exists for - minting a follow-up document from a source that can only produce one. AsourceStatuscompletion hook flips the source once the target exists, and the button goes on being offered on the flipped record: a second invoice for the same proforma, to the same customer, with nothing failing.The hook already declares what "already done" looks like. Nothing consults it.
Proposes
fromStatus:- the source statuses the action may run from - which is thefrom:of atransitionsentry, spelled differently only becausefrom:on a create-from already names the source entity. A create-from declaringsourceStatusand nofromStatusis guarded against exactly that status, so a model carrying this today is corrected without an authoring change.Carries
Specification text,AnchorandDSL indexsections for the fold.