Samir Boulahtit
c100d839f1
Implemented a complete shopping cart system with database persistence, replacing the previous stub implementation. The cart now properly stores items across sessions and follows the project's architecture patterns. Database Changes: - Add cart_items table with vendor_id, session_id, product_id, quantity, price_at_add - Create unique constraint to prevent duplicate items per session - Add indexes for session lookups and old cart cleanup - Run migration a2064e1dfcd4 to create cart_items table New Models & Schemas: - models/database/cart.py: CartItem SQLAlchemy model with relationships - models/schema/cart.py: Pydantic schemas for requests/responses * AddToCartRequest, UpdateCartItemRequest * CartResponse, CartItemResponse, CartOperationResponse, ClearCartResponse Exception Handling: - app/exceptions/cart.py: Cart-specific exceptions following project patterns * CartItemNotFoundException - item not found in cart * InsufficientInventoryForCartException - not enough inventory for cart operation * InvalidCartQuantityException - invalid quantity validation * CartValidationException - general cart validation * EmptyCartException - operations on empty cart * ProductNotAvailableForCartException - product unavailable - Updated app/exceptions/__init__.py to export cart exceptions Service Layer: - Implement cart_service.get_cart() - fetch cart from database with totals - Implement cart_service.add_to_cart() - create or update cart items with inventory checks - Implement cart_service.update_cart_item() - update quantity with validation - Implement cart_service.remove_from_cart() - delete cart item - Implement cart_service.clear_cart() - remove all items for session - Replace generic exceptions with cart-specific ones - Fix InsufficientInventoryException usage (was using wrong parameters) API Layer: - Update app/api/v1/shop/cart.py to use Pydantic schemas - Add response_model declarations to all endpoints - Add return type hints for type safety - Convert service dict responses to Pydantic models Features: - Cart items persist in database across server restarts - Inventory validation before adding/updating items - Price captured at time of adding to cart - Duplicate items update quantity instead of creating new entries - Full CRUD operations with proper error handling - Type-safe API with auto-generated OpenAPI documentation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
55 lines
2.0 KiB
Python
55 lines
2.0 KiB
Python
"""add cart_items table
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Revision ID: a2064e1dfcd4
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Revises: f68d8da5315a
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Create Date: 2025-11-23 19:52:40.509538
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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# revision identifiers, used by Alembic.
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revision: str = 'a2064e1dfcd4'
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down_revision: Union[str, None] = 'f68d8da5315a'
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def upgrade() -> None:
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# Create cart_items table
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op.create_table(
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'cart_items',
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sa.Column('id', sa.Integer(), nullable=False),
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sa.Column('vendor_id', sa.Integer(), nullable=False),
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sa.Column('product_id', sa.Integer(), nullable=False),
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sa.Column('session_id', sa.String(length=255), nullable=False),
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sa.Column('quantity', sa.Integer(), nullable=False),
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sa.Column('price_at_add', sa.Float(), nullable=False),
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sa.Column('created_at', sa.DateTime(), nullable=True),
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sa.Column('updated_at', sa.DateTime(), nullable=True),
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sa.ForeignKeyConstraint(['product_id'], ['products.id'], ),
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sa.ForeignKeyConstraint(['vendor_id'], ['vendors.id'], ),
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sa.PrimaryKeyConstraint('id'),
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sa.UniqueConstraint('vendor_id', 'session_id', 'product_id', name='uq_cart_item')
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)
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# Create indexes
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op.create_index('idx_cart_session', 'cart_items', ['vendor_id', 'session_id'], unique=False)
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op.create_index('idx_cart_created', 'cart_items', ['created_at'], unique=False)
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op.create_index(op.f('ix_cart_items_id'), 'cart_items', ['id'], unique=False)
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op.create_index(op.f('ix_cart_items_session_id'), 'cart_items', ['session_id'], unique=False)
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def downgrade() -> None:
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# Drop indexes
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op.drop_index(op.f('ix_cart_items_session_id'), table_name='cart_items')
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op.drop_index(op.f('ix_cart_items_id'), table_name='cart_items')
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op.drop_index('idx_cart_created', table_name='cart_items')
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op.drop_index('idx_cart_session', table_name='cart_items')
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# Drop table
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op.drop_table('cart_items')
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