Webshop-10-Feature-Gap-Cart-Discounts

10 - Feature Gap: Cart Discounts

Parent: [Webshop-Index Webshop Index] Previous: [Webshop-09-Hooks-and-Events 09 - Hooks & Events] Next: [Webshop-11-Feature-Plan-System-Builder 11 - Feature Plan: System Builder] Source: Comfac Webshop Wiki - Chapter 10

Status: 🔴 Not Implemented | Priority: High

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Problem Statement

Discounts (from Pricing Rules, Coupon Codes, etc.) are calculated on the Quotation backend but are NOT displayed to the customer in the shopping cart UI. Customers see only the final price without understanding what promotions are active or how much they're saving.

Current State

What the customer sees in the cart:

- Item name, code, image - Quantity (editable) - Rate (final price per unit) - Amount (total for that line) - Net Total, Taxes, Grand Total - Coupon code badge (if applied)

What exists on the Quotation but is HIDDEN:

- Original price (price_list_rate) before discount - Discount percentage (discount_percentage) - Per-item discount amount - Total savings - Which pricing rules are active - Additional discount on total (discount_amount, additional_discount_percentage)

Where the Fix Needs to Happen

1. cart_items.html - Per-item discount display

Current: Shows only rate and amount Needed: Show price_list_rate struck through when it differs from rate, plus discount badge

jinja2
{% if item.price_list_rate and item.price_list_rate != item.rate %}
    
        Template:Item.get formatted('price list rate')
    
    
        -Template:Item.discount percentage%
    
{% endif %}

2. cart_payment_summary.html - Savings total
Current: Net Total, Taxes, Grand Total only
Needed: Add "You Save" row

3. cart_items_total.html - Pre-discount subtotal
Current: Shows doc.total only
Needed: Optionally show original total and savings

4. cart_items_dropdown.html - Navbar mini-cart
Current: Shows amount only
Needed: Strike-through price when discounted

5. Quotation DocType Modifications
To "better reflect discounts" per the requirements:

- Consider adding a child table or virtual field that summarizes all active pricing rules per item
- Add a "Discount Summary" section to the Quotation print format
- Potentially add total_savings as a computed field on Quotation

No Backend Changes Needed
All discount data is already computed by ERPNext's pricing engine during:
- apply_cart_settings() 
- set_price_list_and_item_details() 
- calculate_taxes_and_totals()

This is purely a frontend/template display issue.

Files to Modify



File

Change

|--------|----------|



templates/includes/cart/cart_items.html

Add original price, discount % display


templates/includes/cart/cart_payment_summary.html

Add savings row, discount summary


templates/includes/cart/cart_items_total.html

Add pre-discount total


templates/includes/cart/cart_items_dropdown.html

Add strike-through price


public/scss/webshop_cart.scss

Styles for discount badges, strike-through


Edge Cases to Handle
1. Free items (is_free_item=True) - already handled with "FREE" badge
2. Items with no discount (price_list_rate == rate) - no change needed
3. Additional discount on total (doc.discount_amount) - show separately
4. Multiple pricing rules per item - show highest or combined
5. Margin-based pricing - rate_with_margin field

Related Documentation
- [Webshop-13-Discount-Visibility-and-Urgency Chapter 13: Discount Visibility & Urgency] - UI specifications
- [Webshop-14-Hypothesis-Discount-Deadline-Visibility Chapter 14: Hypothesis - Discount Deadline Visibility] - Exact implementation plan



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