# ERD — DO-gated manual batch (delivery orders)

Mermaid ER for karung feedmill counter. Soft FK: no DB foreign keys enforced;
`delivery_orders.batch_id` is informational once a batch row exists. While a
batch is active, membership lives in `current_batch.json` (`do_ids`).

```mermaid
erDiagram
    batches ||--o{ delivery_orders : "soft via do_numbers / batch_id"
    batches ||--o{ daily_summaries : "rolls up by counting_date"

    batches {
        INTEGER id PK
        TEXT counting_date
        INTEGER batch_number
        TEXT camera_name
        TEXT object_label
        INTEGER count
        TEXT start_time
        TEXT end_time
        INTEGER box_loading
        INTEGER box_unloading
        TEXT model_mode
        TEXT plate
        TEXT do_numbers
        INTEGER expected_sack
        INTEGER expected_box
        INTEGER net_sack
        INTEGER net_box
        TIMESTAMP created_at
    }

    delivery_orders {
        INTEGER id PK
        TEXT counting_date
        TEXT photo_path
        TEXT no_do
        TEXT plate
        INTEGER expected_sack
        INTEGER expected_box
        TEXT ocr_raw
        TEXT status
        INTEGER batch_id
        TIMESTAMP created_at
        TIMESTAMP updated_at
    }

    daily_summaries {
        INTEGER id PK
        TEXT counting_date
        TEXT camera_name
        TEXT object_label
        INTEGER total_count
        INTEGER total_batches
        TIMESTAMP updated_at
    }
```

## Relationships (logical)

| From | To | How |
|---|---|---|
| `delivery_orders` → `batches` | N—1 | On stop: `batches.do_numbers` JSON array of `No. DO`; `delivery_orders.batch_id` set best-effort. Active batch: `current_batch.json.do_ids`. |
| `batches` → `daily_summaries` | N—1 | Same counting_date/camera/label; stop recompute `SUM(count)`. |

## Status (`delivery_orders.status`)

`draft` → `staged` (saved/edited) → `attached` (in active/stopped batch) |
`discarded` (deleted). Discarded stop (both nets 0) returns DOs to `staged`.

## JSON sidecars + photo tree (not in SQLite)

| Path | Role |
|---|---|
| `$OUTPUT_DIR/batch_mode.json` | `{mode: auto\|do_manual\|manual}` |
| `$OUTPUT_DIR/current_batch.json` | active batch + `do_ids`, plate, expected_*, nets inputs |
| `$OUTPUT_DIR/do_settings.json` | `require_plate`, `require_do`, `ocr_engine` |
| `$OUTPUT_DIR/do_photos/YYYY-MM-DD/do_<uuid>.jpg` | source photos (7-day retention) |

Schema DDL: `counter_dashboard.py` `_ensure_db()` (additive PRAGMA migrations
on `batches` + `CREATE TABLE delivery_orders`).