def inventory():
    query = db.inventory

    # List of additional links.
    links = []
    links.append(
        dict(header = "Optional",
            body = lambda row : star(row)
        )
    )
#    db.inventory.inventory_starred.readable = False
    # Grid definition.
    grid = SQLFORM.grid(
        query,
        field_id = db.inventory.id, # Useful, not mandatory.
        fields = [db.inventory.inventory_name, db.inventory.inventory_starred],
        links = links,
        # And now some generic defaults.
        details=False,
        create=True, editable=False, deletable=False,
        csv=True,
        user_signature=True, # We don't need it as one cannot take actions directly from the form.
    )
    return dict(grid=grid)