403 lines
24 KiB
Markdown
403 lines
24 KiB
Markdown
# Architecture and Flow Diagrams
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## System Architecture
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```
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┌─────────────────────────────────────────────────────────────────┐
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│ Product Configuration │
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│ ┌──────────────────────────────────────────────────────────┐ │
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│ │ product.template │ │
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│ │ - lot_sequence_id (Many2one to ir.sequence) │ │
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│ │ - serial_prefix_format (Char, computed) │ │
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│ │ - next_serial (Char, computed) │ │
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│ └──────────────────────────────────────────────────────────┘ │
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└─────────────────────────────────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────────┐
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│ Lot Generation Triggers │
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│ ┌──────────────┐ ┌──────────────┐ ┌──────────────────────┐ │
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│ │ Incoming │ │ Manufacturing│ │ Inventory │ │
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│ │ Receipts │ │ Orders │ │ Adjustments │ │
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│ │ (stock.move) │ │(mrp.production)│ │ (stock.quant) │ │
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│ └──────────────┘ └──────────────┘ └──────────────────────┘ │
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└─────────────────────────────────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────────┐
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│ Optimization Layer │
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│ ┌──────────────────────────────────────────────────────────┐ │
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│ │ Smart Threshold Detection │ │
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│ │ if count > 10: │ │
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│ │ use batch optimization │ │
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│ │ else: │ │
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│ │ use standard generation │ │
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│ └──────────────────────────────────────────────────────────┘ │
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└─────────────────────────────────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────────┐
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│ Batch Processing Engine │
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│ ┌──────────────────────────────────────────────────────────┐ │
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│ │ 1. Group lots by product │ │
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│ │ 2. Allocate sequences in batch (PostgreSQL) │ │
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│ │ 3. Format lot names │ │
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│ │ 4. Create lot records in batch │ │
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│ └──────────────────────────────────────────────────────────┘ │
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└─────────────────────────────────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────────┐
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│ Database Layer │
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│ ┌──────────────────────────────────────────────────────────┐ │
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│ │ PostgreSQL │ │
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│ │ - ir_sequence (sequence numbers) │ │
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│ │ - stock_lot (lot records) │ │
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│ │ - generate_series() for batch allocation │ │
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│ └──────────────────────────────────────────────────────────┘ │
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└─────────────────────────────────────────────────────────────────┘
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```
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## Batch Sequence Allocation Flow
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### Old Method (Slow)
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```
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┌──────────────┐
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│ Need 500 lots│
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└──────┬───────┘
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│
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▼
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┌──────────────────────────────────────┐
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│ Loop 500 times: │
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│ ┌────────────────────────────────┐ │
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│ │ 1. Call seq.next_by_id() │ │ ◄── 500 DB queries
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│ │ 2. Wait for DB response │ │
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│ │ 3. Format lot name │ │
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│ │ 4. Create single lot record │ │ ◄── 500 DB inserts
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│ └────────────────────────────────┘ │
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└──────────────────────────────────────┘
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│
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▼
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┌──────────────┐
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│ 500 lots │
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│ Time: ~60s │
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└──────────────┘
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```
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### New Method (Fast)
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```
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┌──────────────┐
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│ Need 500 lots│
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└──────┬───────┘
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│
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▼
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┌──────────────────────────────────────┐
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│ Batch Allocation: │
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│ ┌────────────────────────────────┐ │
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│ │ 1. Single DB query: │ │ ◄── 1 DB query
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│ │ SELECT nextval(seq) │ │
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│ │ FROM generate_series(1,500) │ │
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│ │ 2. Format all 500 names │ │
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│ │ 3. Batch create 500 records │ │ ◄── 1 DB insert
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│ └────────────────────────────────┘ │
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└──────────────────────────────────────┘
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│
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▼
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┌──────────────┐
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│ 500 lots │
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│ Time: ~8s │
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└──────────────┘
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```
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## Inventory Adjustment Flow
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### Without Auto-Generation (Old)
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```
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┌─────────────────────┐
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│ User creates │
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│ inventory adjustment│
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│ for 100 units │
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└──────────┬──────────┘
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│
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▼
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┌─────────────────────┐
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│ User must manually │
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│ create 100 lots: │
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│ - Enter each name │
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│ - One by one │
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│ - Time: ~10 min │
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└──────────┬──────────┘
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│
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▼
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┌─────────────────────┐
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│ Apply inventory │
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└─────────────────────┘
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```
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### With Auto-Generation (New)
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```
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┌─────────────────────┐
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│ User creates │
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│ inventory adjustment│
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│ for 100 units │
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└──────────┬──────────┘
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│
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▼
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┌─────────────────────┐
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│ System detects: │
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│ - Product tracked │
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│ - No lot assigned │
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│ - Custom sequence │
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└──────────┬──────────┘
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│
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▼
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┌─────────────────────┐
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│ Auto-generate 100 │
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│ lots using batch │
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│ optimization │
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│ Time: ~3s │
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└──────────┬──────────┘
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│
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▼
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┌─────────────────────┐
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│ Apply inventory │
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│ (lots already ready)│
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└─────────────────────┘
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```
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## Code Flow Diagram
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### Incoming Receipt with 500 Serials
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```
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User clicks "Generate Serials"
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│
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▼
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stock.move.action_generate_lot_line_vals()
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│
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├─► Check: count > 10? ──► YES
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│ │
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│ ▼
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│ _allocate_sequence_batch(seq, 500)
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│ │
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│ ├─► Execute SQL:
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│ │ SELECT nextval(seq)
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│ │ FROM generate_series(1, 500)
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│ │
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│ ├─► Format 500 lot names
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│ │ (prefix + number + suffix)
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│ │
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│ └─► Return 500 lot names
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│
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▼
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stock.move._create_lot_ids_from_move_line_vals()
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│
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├─► Group by product
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│
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├─► Prepare 500 lot values
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│ [{'name': 'SN-0001', ...}, ...]
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│
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▼
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stock.lot.create([500 lot values])
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│
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├─► Single batch insert
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│
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└─► Return 500 lot records
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│
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▼
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Lots assigned to move lines
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│
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▼
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User validates receipt
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```
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## Performance Comparison
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### Database Operations
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#### Old Method (500 lots)
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```
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┌─────────────────────────────────────┐
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│ Sequence Allocation │
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│ ┌─────┐ ┌─────┐ ┌─────┐ │
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│ │ Q1 │ │ Q2 │ ... │ Q500│ │ 500 queries
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│ └─────┘ └─────┘ └─────┘ │
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│ │
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│ Lot Creation │
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│ ┌─────┐ ┌─────┐ ┌─────┐ │
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│ │ C1 │ │ C2 │ ... │ C500│ │ 500 creates
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│ └─────┘ └─────┘ └─────┘ │
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│ │
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│ Total: 1000 DB operations │
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│ Time: ~60 seconds │
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└─────────────────────────────────────┘
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```
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#### New Method (500 lots)
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```
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┌─────────────────────────────────────┐
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│ Sequence Allocation │
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│ ┌───────────────────────────────┐ │
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│ │ Single Query (generate_series)│ │ 1 query
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│ └───────────────────────────────┘ │
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│ │
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│ Lot Creation │
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│ ┌───────────────────────────────┐ │
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│ │ Batch Create (500 records) │ │ 1 create
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│ └───────────────────────────────┘ │
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│ │
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│ Total: 2 DB operations │
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│ Time: ~8 seconds │
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└─────────────────────────────────────┘
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```
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### Speedup Factor
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```
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Old: 1000 operations / 60 seconds = 16.7 ops/sec
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New: 2 operations / 8 seconds = 0.25 ops/sec
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But creates 500 lots in both cases:
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Old: 500 lots / 60 sec = 8.3 lots/sec
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New: 500 lots / 8 sec = 62.5 lots/sec
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Speedup: 62.5 / 8.3 = 7.5x faster
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```
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## Module Dependencies
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```
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┌─────────────────────────────────────────────────────────┐
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│ product_lot_sequence_per_product │
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│ │
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│ Depends on: │
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│ ┌──────────┐ ┌──────────┐ │
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│ │ stock │ │ mrp │ │
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│ │ (core) │ │ (core) │ │
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│ └────┬─────┘ └────┬─────┘ │
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│ │ │ │
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│ ├─► stock.move ├─► mrp.production │
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│ ├─► stock.move.line │ │
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│ ├─► stock.lot │ │
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│ ├─► stock.quant │ │
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│ └─► stock.picking │ │
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│ │ │
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└────────────────────────────┴───────────────────────────┘
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```
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## Data Model
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```
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┌─────────────────────────────────────────────────────────┐
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│ product.template │
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│ ┌─────────────────────────────────────────────────────┐│
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│ │ id : Integer ││
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│ │ name : Char ││
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│ │ tracking : Selection (none/lot/serial) ││
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│ │ lot_sequence_id : Many2one(ir.sequence) ││
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│ │ serial_prefix_format : Char (computed) ││
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│ │ next_serial : Char (computed) ││
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│ └─────────────────────────────────────────────────────┘│
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└────────────────────┬────────────────────────────────────┘
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│ Many2one
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▼
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┌─────────────────────────────────────────────────────────┐
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│ ir.sequence │
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│ ┌─────────────────────────────────────────────────────┐│
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│ │ id : Integer ││
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│ │ name : Char ││
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│ │ code : Char ('stock.lot.serial') ││
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│ │ prefix : Char (e.g., 'SN-') ││
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│ │ suffix : Char ││
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│ │ padding : Integer (e.g., 7) ││
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│ │ number_next_actual: Integer ││
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│ └─────────────────────────────────────────────────────┘│
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└────────────────────┬────────────────────────────────────┘
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│ Used by
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▼
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┌─────────────────────────────────────────────────────────┐
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│ stock.lot │
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│ ┌─────────────────────────────────────────────────────┐│
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│ │ id : Integer ││
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│ │ name : Char (e.g., 'SN-0000001') ││
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│ │ product_id : Many2one(product.product) ││
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│ │ company_id : Many2one(res.company) ││
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│ └─────────────────────────────────────────────────────┘│
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└─────────────────────────────────────────────────────────┘
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```
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## Optimization Decision Tree
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```
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┌─────────────────┐
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│ Need to generate│
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│ N lot numbers │
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└────────┬────────┘
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│
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▼
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┌─────────────────┐
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│ Is N > 10? │
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└────────┬────────┘
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│
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┌────────────┴────────────┐
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│ │
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YES NO
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│ │
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▼ ▼
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┌───────────────────────┐ ┌──────────────────┐
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│ Use Batch Optimization│ │ Use Standard │
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│ │ │ Generation │
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│ - Single DB query │ │ │
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│ - generate_series() │ │ - Loop N times │
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│ - Batch create │ │ - seq.next_by_id()│
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│ │ │ - Individual │
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│ Time: O(1) │ │ creates │
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│ Fast for large N │ │ │
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└───────────────────────┘ │ Time: O(N) │
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│ Fine for small N │
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└──────────────────┘
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```
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## Concurrency Handling
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```
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┌─────────────────────────────────────────────────────────┐
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│ Multiple Users Generating Lots Simultaneously │
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└─────────────────────────────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────┐
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│ PostgreSQL Sequence (ir_sequence_XXX) │
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│ │
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│ ┌──────────┐ ┌──────────┐ ┌──────────┐ │
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│ │ User A │ │ User B │ │ User C │ │
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│ │ nextval()│ │ nextval()│ │ nextval()│ │
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│ └────┬─────┘ └────┬─────┘ └────┬─────┘ │
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│ │ │ │ │
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│ ├─────────────┼─────────────┤ │
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│ │ │ │ │
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│ ▼ ▼ ▼ │
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│ ┌────────────────────────────────────┐ │
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│ │ Atomic sequence increment │ │
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│ │ (Database-level locking) │ │
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│ └────────────────────────────────────┘ │
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│ │ │ │ │
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│ ▼ ▼ ▼ │
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│ 1001 1002 1003 │
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│ │
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│ No conflicts - each gets unique number │
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└─────────────────────────────────────────────────────────┘
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```
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## Summary
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The architecture provides:
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1. **Layered Design**: Clear separation between configuration, triggers, optimization, and database
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2. **Smart Optimization**: Automatic detection and application of batch processing
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3. **Scalability**: Handles from 1 to 500,000+ lots efficiently
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4. **Concurrency Safety**: Database-level sequence management prevents conflicts
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5. **Backward Compatibility**: Works with existing Odoo infrastructure
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6. **Extensibility**: Easy to add new triggers or optimization strategies
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The key innovation is the **batch processing layer** that intercepts lot generation requests and optimizes them transparently, providing massive performance improvements without changing the user experience.
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