Ignoring Django Migrations in pyproject.toml file for Black formatter

Add the migration exclusion to your .pre-commit-config.yaml file

- id: black
  exclude: ^.*\b(migrations)\b.*$

That's the solution to the problem: pyproject.toml

[tool.black]
exclude = '''
/(
  | migrations
)/

'''

Try this (note last line):

[tool.black]
line-length = 79
include = '\.pyi?$'
exclude = '''
/(
    \.git
  | \.hg
  | \.mypy_cache
  | \.tox
  | \.venv
  | _build
  | buck-out
  | build
  | dist
  | migrations
)/
'''