Multitenant implementation with custom Domain, theme per vendor

models/database/vendor_theme.py

@@ -3,30 +3,37 @@
 Vendor Theme Configuration Model
 Allows each vendor to customize their shop's appearance
 """
-from datetime import datetime, timezone
-from sqlalchemy import Column, Integer, String, Boolean, Text, JSON, DateTime, ForeignKey
+from sqlalchemy import Column, Integer, String, Boolean, Text, JSON, ForeignKey
 from sqlalchemy.orm import relationship
 from app.core.database import Base
 from models.database.base import TimestampMixin
 
+
 class VendorTheme(Base, TimestampMixin):
     """
     Stores theme configuration for each vendor's shop.
 
-    Each vendor can have:
+    Each vendor can have ONE active theme:
     - Custom colors (primary, secondary, accent)
     - Custom fonts
     - Custom logo and favicon
     - Custom CSS overrides
     - Layout preferences
+
+    Theme presets available: default, modern, classic, minimal, vibrant
     """
     __tablename__ = "vendor_themes"
 
     id = Column(Integer, primary_key=True, index=True)
-    vendor_id = Column(Integer, ForeignKey("vendors.id", ondelete="CASCADE"), nullable=False, unique=True)
+    vendor_id = Column(
+        Integer,
+        ForeignKey("vendors.id", ondelete="CASCADE"),
+        nullable=False,
+        unique=True  # ONE vendor = ONE theme
+    )
 
     # Basic Theme Settings
-    theme_name = Column(String(100), default="default")  # e.g., "modern", "classic", "minimal"
+    theme_name = Column(String(100), default="default")  # default, modern, classic, minimal, vibrant
     is_active = Column(Boolean, default=True)
 
     # Color Scheme (JSON for flexibility)
@@ -64,8 +71,8 @@ class VendorTheme(Base, TimestampMixin):
     meta_title_template = Column(String(200), nullable=True)  # e.g., "{product_name} - {shop_name}"
     meta_description = Column(Text, nullable=True)
 
-    # Relationships
-    vendor = relationship("Vendor", back_populates="theme")
+    # Relationships - FIXED: back_populates must match the relationship name in Vendor model
+    vendor = relationship("Vendor", back_populates="vendor_theme")
 
     def __repr__(self):
         return f"<VendorTheme(vendor_id={self.vendor_id}, theme_name='{self.theme_name}')>"