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Populating the Navigation Menu

Both core applications and Apps can contribute items to the navigation menu by defining menu_items inside of their app's navigation.py. Using the key and weight system, a developer can integrate amongst existing menu tabs, groups, items and buttons and/or create entirely new menus as desired.

Modifying Existing Menu

By defining an object with the same identifier, a developer can modify existing objects. The example below shows modifying an existing tab to have a new group.

A tab object is being created with the same identifier as an existing object using the name attribute. Then a group is being created with a weight of 150, which means it will appear between the already defined Circuits and Provider groups.

Tip

Weights for already existing items can be found in the nautobot source code (in navigation.py) or with a web session open to your nautobot instance, you can inspect an element of the navbar using the developer tools. Each type of element will have an attribute data-{type}-weight. The type can be tab, group, item or button.

This pattern works for modifying all objects in the tree. New items can be added to existing groups and new buttons can be added to existing items.

menu_tabs = (
    NavMenuTab(
        name="Circuits",
        groups=(
            NavMenuGroup(
                name="Example Circuit Group",
                weight=150,
                items=(
                    NavMenuItem(
                        link="plugins:example_app:examplemodel_list",
                        name="Example Model",
                        permissions=[
                            "example_app.view_examplemodel"
                        ],
                        buttons=(
                            NavMenuAddButton(
                                link="plugins:example_app:examplemodel_add",
                                permissions=[
                                    "example_app.add_examplemodel",
                                ],
                            ),
                            NavMenuImportButton(
                                link="plugins:example_app:examplemodel_import",
                                permissions=[
                                    "example_app.add_examplemodel"
                                ],
                            ),
                        ),
                    ),
                ),
            ),
        ),
    ),
)

Adding a New Menu

The code below shows how to add a new tab to the navbar. A tab is defined by a NavMenuTab object. Similarly a group is defined using NavMenuGroup. Both of these objects are used as containers for actual items.

The position in the navigation menu is defined by the weight. The lower the weight the closer to the start of the menus the object will be. All core objects have weights in multiples of 100, meaning there is plenty of space around the objects for Apps to customize.

Below you can see Example Menu has a weight value of 150. This means the tab (menu) will appear between Organization (100) and Devices (200).

from nautobot.core.apps import NavMenuAddButton, NavMenuGroup, NavMenuItem, NavMenuImportButton, NavMenuTab

menu_items = (
    NavMenuTab(
        name="Example Menu",
        weight=150,
        groups=(
            NavMenuGroup(
                name="Example Group 1",
                weight=100,
                items=(
                    NavMenuItem(
                        link="plugins:example_app:examplemodel_list",
                        link_text="Example Model",
                        permissions=[
                            "example_app.view_examplemodel"
                        ],
                        buttons=(
                            NavMenuAddButton(
                                link="plugins:example_app:examplemodel_add",
                                permissions=[
                                    "example_app.add_examplemodel",
                                ],
                            ),
                            NavMenuImportButton(
                                link="plugins:example_app:examplemodel_import",
                                permissions=[
                                    "example_app.add_examplemodel"
                                ],
                            ),
                        ),
                    ),
                ),
            ),
        ),
    ),
)

Classes and Attributes

A NavMenuTab has the following attributes:

  • name - Display name to be shown in navigation menu
  • weight - Defines the position the object should be displayed at (optional)
  • permissions - A list of permissions required to display this link (optional)
  • groups - List or tuple of NavMenuGroup

A NavMenuGroup has the following attributes:

  • name - Display name to be shown in navigation menu
  • weight - Defines the position the object should be displayed at (optional)
  • permissions - A list of permissions required to display this link (optional)
  • items - List or tuple of NavMenuItem

A NavMenuItem has the following attributes:

  • link - The name of the URL path to which this menu item links
  • name - The text presented to the user
  • weight - Defines the position the object should be displayed at (optional)
  • permissions - A list of permissions required to display this link (optional)
  • buttons - An iterable of NavMenuButton (or subclasses of NavMenuButton) instances to display (optional)

Note

Any buttons associated within a menu item will be hidden if the user does not have permission to access the menu item, regardless of what permissions are set on the buttons.

A NavMenuButton has the following attributes:

  • title - The tooltip text (displayed when the mouse hovers over the button)
  • link - The name of the URL path to which this button links
  • weight - Defines the position the object should be displayed at (optional)
  • icon_class - Button icon CSS classes (Nautobot currently supports Material Design Icons or one of the choices provided by ButtonActionIconChoices)
  • button_class - One of the choices provided by ButtonActionColorChoices (optional)
  • permissions - A list of permissions required to display this button (optional)

Note

NavMenuAddButton and NavMenuImportButton are subclasses of NavMenuButton that can be used to provide the commonly used "Add" and "Import" buttons with appropriate defaults for title, icon_class, button_class, and weight.