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Build read models and projections from event streams. Use when implementing CQRS read sides, building materialized views, or optimizing query performance in event-sourced systems.
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Based on SOC occupation classification
| name | projection-patterns |
| description | Build read models and projections from event streams. Use when implementing CQRS read sides, building materialized views, or optimizing query performance in event-sourced systems. |
Comprehensive guide to building projections and read models for event-sourced systems.
โโโโโโโโโโโโโโโ โโโโโโโโโโโโโโโ โโโโโโโโโโโโโโโ
โ Event Store โโโโโโบโ Projector โโโโโโบโ Read Model โ
โ โ โ โ โ (Database) โ
โ โโโโโโโโโโโ โ โ โโโโโโโโโโโ โ โ โโโโโโโโโโโ โ
โ โ Events โ โ โ โ Handler โ โ โ โ Tables โ โ
โ โโโโโโโโโโโ โ โ โ Logic โ โ โ โ Views โ โ
โ โ โ โโโโโโโโโโโ โ โ โ Cache โ โ
โโโโโโโโโโโโโโโ โโโโโโโโโโโโโโโ โโโโโโโโโโโโโโโ
| Type | Description | Use Case |
|---|---|---|
| Live | Real-time from subscription | Current state queries |
| Catchup | Process historical events | Rebuilding read models |
| Persistent | Stores checkpoint | Resume after restart |
| Inline | Same transaction as write | Strong consistency |
Full template library and detailed worked examples live in references/details.md. Read that file when you need the concrete templates.
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