django-flex-menus 0.4.2

Flexible site menus for Django

Django Flex Menu

A flexible menu management system for Django built around anytree.

Features

• Modular, tree-based design for easy customization and extension
• Flexible URL resolution
• Object-based processing for detail view menus
• Thread-safe processing for concurrent requests
• Request-specific menu state isolation
• Simple template system with single template attribute per component
• Child type validation for theme-specific menu classes

Installation

API

Once you have a menu instance, you can modify it in the following ways:

main_menu = Menu("Site Menu")
child_menu = MenuLink("My Child", url="/my-child")

# Append a child
main_menu.append(child_menu)

# Get a child instance by name
child_menu = main_menu.get("My Child")

# Pop a child (note this is done via the child menu, not the parent menu)
child = child_menu.pop()

# Extend a menu with a list of menu items
main_menu.extend([child_menu, child_menu2, child_menu3])

# Insert child/children at a specific position
main_menu.insert(child_menu, 2)

# Insert child after another named child
main_menu.insert_after(child_menu, "My Other Child")

Configuration

Logging URL Resolution Failures

By default, URL resolution failures are only logged when DEBUG=True. To control this behavior:

# In your Django settings
FLEX_MENU_LOG_URL_FAILURES = False  # Disable logging (recommended for production)
FLEX_MENU_LOG_URL_FAILURES = True   # Always log failures
# Default: settings.DEBUG

See CONFIGURATION.md for detailed configuration options.

Performance Considerations

For optimal performance in production:

• Avoid menu.copy() during request processing - it's expensive
• Cache permission checks when possible - use @lru_cache or Django's cache framework
• Pre-resolve static URLs during app startup for menus that don't change
• Use lazy evaluation - check parent visibility before processing children
• Consider menu depth - deep hierarchies can impact performance

See PERFORMANCE.md for detailed optimization strategies.

Thread Safety

⚠️ Important: The menu processing is now thread-safe for concurrent requests. Each request gets its own processed copy to prevent race conditions.

See THREAD_SAFETY.md for detailed information about concurrency handling.

Theme-Specific Menu Classes

Create type-safe theme-specific menu classes:

class Bootstrap5DropdownMenu(Menu):
    template = "bootstrap5/dropdown-menu.html"
    allowed_children = ['Bootstrap5DropdownMenuLink']

class Bootstrap5DropdownMenuLink(MenuLink):
    template = "bootstrap5/dropdown-item.html"

# Type validation prevents mixing incompatible components
dropdown = Bootstrap5DropdownMenu("User Menu")
dropdown.append(Bootstrap5DropdownMenuLink("Profile", view_name="profile"))  # ✅ OK
dropdown.append(MenuLink("Settings", view_name="settings"))  # ❌ TypeError!

See THEME_CLASSES.md for detailed examples and patterns.

See also

django-account-management