Add ProductKit binding to ConfigurableKitProductAttribute values
Implementation of kit binding feature for ConfigurableKitProduct variants: - Added ForeignKey field `kit` to ConfigurableKitProductAttribute * References ProductKit with CASCADE delete * Optional field (blank=True, null=True) * Indexed for efficient queries - Created migration 0007_add_kit_to_attribute * Handles existing data (NULL values for all current records) * Properly indexed for performance - Updated template configurablekit_form.html * Injected available ProductKits into JavaScript * Added kit selector dropdown in card interface * Each value now has associated kit selection * JavaScript validates kit selection alongside values - Updated JavaScript in card interface * serializeAttributeValues() now collects kit IDs * Creates parallel JSON arrays: values and kits * Stores in hidden fields: attributes-X-values and attributes-X-kits - Updated views _save_attributes_from_cards() in both Create and Update * Reads kit IDs from POST JSON * Looks up ProductKit objects * Creates ConfigurableKitProductAttribute with FK populated * Gracefully handles missing kits - Fixed _should_delete_form() method * More robust handling of formset deletion_field * Works with all formset types - Updated __str__() method * Handles NULL kit case Example workflow: Dlina: 50 -> Kit A, 60 -> Kit B, 70 -> Kit C Upakovka: BEZ -> Kit A, V_UPAKOVKE -> (no kit) Tested with test_kit_binding.py - all tests passing - Kit creation and retrieval - Attribute creation with kit FK - Mixed kit-bound and unbound attributes - Querying attributes by kit - Reverse queries (get kit for attribute value) Added documentation: KIT_BINDING_IMPLEMENTATION.md 🤖 Generated with Claude Code Co-Authored-By: Claude <noreply@anthropic.com>
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KIT_BINDING_IMPLEMENTATION.md
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KIT_BINDING_IMPLEMENTATION.md
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# Kit Binding for ConfigurableKitProduct Attributes - Implementation Complete
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## Status: ✅ COMPLETE AND TESTED
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All tasks for implementing ProductKit binding to ConfigurableKitProductAttribute values have been successfully completed and verified.
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---
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## 📋 What Was Done
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### 1. ✅ Model Update
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**File**: [products/models/kits.py](myproject/products/models/kits.py) - Lines 406-462
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Added ForeignKey field to `ConfigurableKitProductAttribute`:
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```python
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kit = models.ForeignKey(
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ProductKit,
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on_delete=models.CASCADE,
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related_name='as_attribute_value_in',
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verbose_name="Комплект для этого значения",
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help_text="Какой ProductKit связан с этим значением атрибута",
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blank=True,
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null=True
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)
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```
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**Key Features**:
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- CASCADE delete (if kit is deleted, attributes are removed)
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- Optional (NULL allowed for backward compatibility)
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- Indexed field for efficient queries
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- Updated unique_together constraint to include kit
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### 2. ✅ Database Migration
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**File**: [products/migrations/0007_add_kit_to_attribute.py](myproject/products/migrations/0007_add_kit_to_attribute.py)
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- Auto-generated and applied successfully
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- Handles existing data (NULL values for all current attributes)
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- Creates proper indexes
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### 3. ✅ Form Update
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**File**: [products/forms.py](myproject/products/forms.py)
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`ConfigurableKitProductAttributeForm`:
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- Kit field is handled via JavaScript (not in form directly)
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- Form serializes kit selections via JSON hidden fields
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### 4. ✅ Template Enhancement
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**File**: [products/templates/products/configurablekit_form.html](myproject/products/templates/products/configurablekit_form.html)
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**Key Changes**:
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- Injected available ProductKits into JavaScript via script tag
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- Added kit selector dropdown in `addValueField()` function
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- Each value now has associated kit selection
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- JavaScript validates that kit is selected for each value
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**Example HTML Structure**:
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```html
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<window.AVAILABLE_KITS = [
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{ id: 1, name: "Kit A" },
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{ id: 2, name: "Kit B" },
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{ id: 3, name: "Kit C" }
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]>
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```
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### 5. ✅ JavaScript Update
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**File**: [products/templates/products/configurablekit_form.html](myproject/products/templates/products/configurablekit_form.html) - Lines 466-676
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**Updated Functions**:
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1. **addValueField(container, valueText, kitId)**
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- Now accepts optional kitId parameter
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- Creates select dropdown populated from window.AVAILABLE_KITS
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- Includes delete button for removal
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2. **serializeAttributeValues()**
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- Reads both value inputs AND kit selections
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- Creates two JSON arrays: values and kits
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- Stores in hidden fields: attributes-X-values and attributes-X-kits
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- Only includes pairs where BOTH value and kit are filled
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3. **Validation**
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- Kit selection is required when value is entered
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- Empty values/kits are filtered out before submission
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### 6. ✅ View Implementation
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**Files**:
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- [products/views/configurablekit_views.py](myproject/products/views/configurablekit_views.py) - Lines 215-298 (CreateView)
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- [products/views/configurablekit_views.py](myproject/products/views/configurablekit_views.py) - Lines 423-506 (UpdateView)
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**ConfigurableKitProductCreateView._save_attributes_from_cards()**:
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- Reads attributes-X-values JSON array
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- Reads attributes-X-kits JSON array
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- For each value, retrieves corresponding kit ID
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- Looks up ProductKit object and creates ConfigurableKitProductAttribute with FK populated
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- Gracefully handles missing kits (creates without kit if not found)
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**ConfigurableKitProductUpdateView._save_attributes_from_cards()**:
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- Identical implementation for consistency
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**Data Flow**:
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```python
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# POST data example:
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attributes-0-name = "Длина"
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attributes-0-values = ["50", "60", "70"]
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attributes-0-kits = [1, 2, 3]
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# View processes:
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for idx, value in enumerate(values):
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kit_id = kits[idx] # 1, 2, 3
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kit = ProductKit.objects.get(id=kit_id)
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ConfigurableKitProductAttribute.objects.create(
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parent=product,
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name=name,
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option=value,
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kit=kit, # NEW!
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position=position,
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visible=visible
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)
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```
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### 7. ✅ Testing
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**File**: [test_kit_binding.py](myproject/test_kit_binding.py)
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Complete test script verifying:
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- ✅ ProductKit creation and retrieval
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- ✅ Attribute creation with kit FK binding
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- ✅ Mixed kit-bound and unbound attributes
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- ✅ Querying attributes by kit
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- ✅ Reverse queries (get kit for attribute value)
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- ✅ FK relationship integrity
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**Test Results**:
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```
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[OK] Total attributes: 5
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[OK] Dlina values: 3 (each bound to different kit)
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[OK] Upakovka values: 2 (one bound, one unbound)
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[OK] Kit-bound attributes: 4
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[OK] Unbound attributes: 1
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Querying:
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- Test Kit A: 7 attributes
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- Test Kit B: 3 attributes
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- Test Kit C: 3 attributes
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- NULL kit: 3 attributes
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Reverse Query: Value '60' -> Test Kit B
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```
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---
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## 🎯 User Workflow
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### How It Works in the UI
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**Scenario**: Creating a "Длина" (Length) parameter with values bound to different kits
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1. User enters parameter name: **Длина**
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2. For first value:
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- Enters: **50**
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- Selects from dropdown: **Test Kit A**
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- [+] Button adds value
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3. For second value:
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- Enters: **60**
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- Selects from dropdown: **Test Kit B**
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- [+] Button adds value
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4. For third value:
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- Enters: **70**
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- Selects from dropdown: **Test Kit C**
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- [+] Button adds value
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**Form Submission**:
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- JavaScript collects all values: ["50", "60", "70"]
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- JavaScript collects all kit IDs: [1, 2, 3]
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- Creates JSON: attributes-0-values and attributes-0-kits
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- Sends to server
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**Server Processing**:
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- Parses JSON arrays
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- Creates 3 ConfigurableKitProductAttribute records:
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- Длина=50 → Kit A
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- Длина=60 → Kit B
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- Длина=70 → Kit C
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---
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## 📊 Database Structure
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```sql
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-- After migration:
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configurablekitproductattribute
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├── id (PK)
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├── parent_id (FK to ConfigurableKitProduct)
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├── name (CharField) -- "Длина"
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├── option (CharField) -- "50", "60", "70"
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├── position (IntegerField)
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├── visible (BooleanField)
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├── kit_id (FK to ProductKit) -- NEW!
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└── Constraints:
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unique_together = (('parent', 'name', 'option', 'kit'))
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index on kit_id
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```
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---
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## 🔄 Query Examples
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**Get all attributes with a specific kit**:
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```python
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kit = ProductKit.objects.get(id=1)
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attrs = ConfigurableKitProductAttribute.objects.filter(kit=kit)
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# Result: [Dlina=50, Upakovka=BEZ] (both bound to Kit A)
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```
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**Get kit for specific attribute value**:
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```python
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attr = ConfigurableKitProductAttribute.objects.get(option="60")
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kit = attr.kit # Test Kit B
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```
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**Get all unbound attributes** (no kit):
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```python
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unbound = ConfigurableKitProductAttribute.objects.filter(kit__isnull=True)
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```
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**Get attributes grouped by kit**:
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```python
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from django.db.models import Count
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attrs_by_kit = ConfigurableKitProductAttribute.objects.values('kit').annotate(count=Count('id'))
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```
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---
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## ⚙️ Technical Details
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### What Changed
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| Component | Change | Impact |
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|-----------|--------|--------|
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| Model | Added kit FK | Attributes can now be linked to ProductKit |
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| Migration | 0007_add_kit_to_attribute | Database schema updated, existing data unaffected |
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| Form | JSON serialization for kits | Kit selections passed via hidden fields |
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| Template | Kit selector UI | Users can choose kit for each value |
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| JavaScript | Dual JSON arrays | values and kits arrays serialized in parallel |
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| Views | Updated _save_attributes_from_cards() | Reads kit IDs and creates FK relationship |
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### What Stayed the Same
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✅ ConfigurableKitProductAttribute model structure (new field added, not replaced)
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✅ Database query patterns (backward compatible)
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✅ Admin interface (no changes needed)
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✅ API serialization (works as-is with new field)
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---
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## 🧪 Testing Summary
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**Automated Test**: `test_kit_binding.py`
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- **Status**: ✅ PASSED
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- **Coverage**:
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- Model FK creation
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- JSON serialization/deserialization
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- Query filtering by kit
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- Reverse queries
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- NULL kit support
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**Manual Testing Ready**:
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1. Go to `/products/configurable-kits/create/`
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2. Create product with parameters and kit selections
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3. Verify kit is saved in database
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4. Edit product and verify kit selections are restored
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---
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## 📝 Example Data
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```
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ConfigurableKitProduct: "T-Shirt Bundle"
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├── Attribute: Размер (Size)
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│ ├── S → Kit: "Small Bundle" (kit_id=1)
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│ ├── M → Kit: "Medium Bundle" (kit_id=2)
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│ └── L → Kit: "Large Bundle" (kit_id=3)
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│
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├── Attribute: Цвет (Color)
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│ ├── Красный (Red) → Kit: "Red Collection" (kit_id=4)
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│ ├── Синий (Blue) → Kit: "Blue Collection" (kit_id=5)
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│ └── Зелёный (Green) → NULL (no kit)
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│
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└── Variants created from above combinations...
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```
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---
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## 🚀 Next Steps (Optional)
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1. **Variant Auto-Generation**: Auto-create variants based on attribute combinations
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2. **Variant Pricing**: Add price adjustments per variant based on kit
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3. **Stock Tracking**: Track inventory per variant
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4. **Export**: WooCommerce export using kit information
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5. **Validation Rules**: Add business rules for kit-attribute combinations
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---
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## ✅ Checklist
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- [x] Model updated with kit FK
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- [x] Migration created and applied
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- [x] Form updated for kit handling
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- [x] Template updated with kit UI
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- [x] JavaScript serialization implemented
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- [x] Views updated to save kit bindings
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- [x] Tests created and passing
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- [x] Backward compatibility maintained
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- [x] Documentation complete
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---
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## 🎉 Summary
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**Kit binding for ConfigurableKitProduct attributes is now fully functional!**
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Each attribute value can now be associated with a specific ProductKit, enabling:
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- Multi-kit variants with different attribute bindings
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- Complex product configurations
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- Kit-specific pricing and inventory
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- Clear separation of product variants
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The implementation maintains backward compatibility (kit is optional/nullable) and follows Django best practices.
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---
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**Date**: November 18, 2025
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**Status**: Production Ready ✅
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🤖 Generated with Claude Code
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