const static Int add := 1

Flag bitmask for isAdd

const Dict changes

Changes applied to oldRec with resulting newRec

const Int flags

Bitmask meta-data for diff

const static Int force := 8

Flag bitmask for isForce

const static Int forceTransient := @force.or(@transient)

Flag bitmask for force and transient

Obj? getNew(Str tag, Obj? def := null)

Get tag value from new record or null.

Obj? getOld(Str tag, Obj? def := null)

Get tag value from old record or null.

const Ref id

Target record id

Bool isAdd()

Flag indicating if adding a new record to the project

Bool isForce()

Flag indicating that changes should be applied regardless of other concurrent changes which may be been applied after the oldRec version was read.

Bool isRemove()

Flag indicating if remove an existing record from the project

Bool isTransient()

Flag indicating that this diff should not be flushed to persistent storage (it may or may not be persisted).

Bool isUpdate()

Update diff - not an add nor a remove

new make(Dict? oldRec, Obj? changes, Int flags := 0)

Construct a modfication for an existing record. The oldRec should be the instance which was read from the project. Any tags to add/set/remove should be included in the changes dict. Use Remove.val to indicate a tag should be removed. See makeAdd to create a Diff for adding a new record to a project.

new makeAdd(Obj? changes, Ref id := Ref.gen())

Make a Diff to add a new record into the database.

const DateTime? newMod

Timestamp version of newRec or null

const Dict? newRec

Updated record which is null until after commit

const DateTime? oldMod

Timestamp version of oldRec or null if adding new record

const Dict? oldRec

Original record or null if adding new record

const static Int remove := 2

Flag bitmask for isRemove

virtual override Str toStr()

String representation

const static Int transient := 4

Flag bitmask for isTransient