code: def _set_slug(db, dataset_dict):
      _id = dataset_dict["_id"]
      name = dataset_dict.get("name", None)
      slug = dataset_dict.get("slug", None)
  
      existing_names = set()
      existing_slugs = set()
  
      for d in db.datasets.find(
          {"_id": {"$ne": _id}}, {"name": 1, "slug": 1}
      ):
          if "name" in d:
              existing_names.add(d["name"])
  
          if "slug" in d:
              existing_slugs.add(d["slug"])
  
      if name is None:
          name = _get_default_dataset_name(existing_names)
  
      if slug is None:
          try:
              # Give the user a one-time pass if they have a really long dataset
              # name to have a slug-friendly name that's shorter
              slug = _to_slug(name[: _NAME_LENGTH_RANGE[1]])
          except Exception as e:
              old_name = name
              name = _get_default_dataset_name(existing_names)
              slug = _to_slug(name)
  
              logger.warning(e)
              logger.warning(
                  "Renaming dataset '%s' to '%s'", old_name, name
              )
  
      if name in existing_names or slug in existing_slugs:
          old_name = name
  
          # Make a valid, unique name that resembles the original
          name = _get_default_dataset_name(existing_names)
          name = old_name + "-RENAMED-" + name
          name = name[-_NAME_LENGTH_RANGE[1] :]
  
          slug = _to_slug(name)
  
          logger.warning(
              "Dataset name '%s' conflicts with another dataset's name",
              old_name,
          )
          logger.warning(
              "Renaming dataset '%s' to '%s'", old_name, name
          )
  
      dataset_dict["name"] = name
      dataset_dict["slug"] = slug
  
file_path: fiftyone/fiftyone/migrations/revisions/v0_19_0.py
imports: from datetime import datetime
  import logging
  import string
  from bson import ObjectId
label_desc: Use image node_id 7 for calling a global function with example usage: _set_slug(db, dataset_dict) without return types