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# Which Problems Are Solved - The eventstore did not support intentionally overwriting the resource owner when creating events for aggregates that may be reused across owners. - Resource owner handling was implicit and could not be controlled per command/event type. - We needed a safe way to distinguish between: - keeping the existing aggregate owner, and - explicitly setting a new owner for specific create-like events. # How the Problems Are Solved - Introduced a new eventstore command type with an explicit enforce_owner flag. - Updated eventstore.commands_to_events and eventstore.push so owner assignment is now explicit: - if enforce_owner is true, the command owner is written - if enforce_owner is false, the existing aggregate owner is retained when present - Added EnforceResourceOwnerCommand and wiring so command types can opt in to enforced owner behavior. - Wired the new behavior through the v3 eventstore push path, including compatibility fallback for older command type mapping. - Added migration/setup changes to register and use the new command type and SQL functions. - Added and updated tests for owner overwrite and aggregate ID reuse scenarios. # Additional Changes - Added small migration/setup robustness improvements related to eventstore setup ordering and helper reuse. - Added focused test coverage for enforced owner behavior and sequencing. - Events that currently allow owner changes (implement EnforceResourceOwner) are: - AddedEvent (action) - GroupAddedEvent - StartedEvent (idp intent) - ProjectAddedEvent - HumanAddedEvent - HumanRegisteredEvent - MachineAddedEvent - CreatedEvent (schema user) # Additional Context - Follow-up for eventstore owner-handling correctness in create flows and aggregate ID reuse cases. - No additional issue link was attached for this change. --------- Co-authored-by: abhishek kumar gupta <[email protected]>
60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
package eventstore
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import (
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"time"
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)
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// WriteModel is the minimum representation of a command side write model.
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// It implements a basic reducer
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// it's purpose is to reduce events to create new ones
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type WriteModel struct {
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AggregateID string `json:"-"`
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ProcessedSequence uint64 `json:"-"`
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Events []Event `json:"-"`
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ResourceOwner string `json:"-"`
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InstanceID string `json:"-"`
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ChangeDate time.Time `json:"-"`
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}
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// AppendEvents adds all the events to the read model.
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// The function doesn't compute the new state of the read model
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func (rm *WriteModel) AppendEvents(events ...Event) {
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rm.Events = append(rm.Events, events...)
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}
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// Reduce is the basic implementation of reducer
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// If this function is extended the extending function should be the last step
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func (wm *WriteModel) Reduce() error {
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if len(wm.Events) == 0 {
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return nil
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}
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latestEvent := wm.Events[len(wm.Events)-1]
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if wm.AggregateID == "" {
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wm.AggregateID = latestEvent.Aggregate().ID
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}
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if wm.ResourceOwner == "" {
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wm.ResourceOwner = latestEvent.Aggregate().ResourceOwner
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}
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for _, event := range wm.Events {
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if _, ok := event.(EnforceResourceOwnerCommand); ok {
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wm.ResourceOwner = event.Aggregate().ResourceOwner
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}
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}
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if wm.InstanceID == "" {
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wm.InstanceID = latestEvent.Aggregate().InstanceID
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}
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wm.ProcessedSequence = latestEvent.Sequence()
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wm.ChangeDate = latestEvent.CreatedAt()
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// all events processed and not needed anymore
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wm.Events = nil
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wm.Events = []Event{}
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return nil
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}
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