Changelogs » Pydantic



* Signature generation with `extra: allow` never uses a field name, 1418 by prettywood
* Avoid mutating `Field` default value, 1412 by prettywood


* Make includes/excludes arguments for `.dict()`, `._iter()`, ..., immutable, 1404 by AlexECX
* Always use a field's real name with includes/excludes in `model._iter()`, regardless of `by_alias`, 1397 by AlexECX
* Update constr regex example to include start and end lines, 1396 by lmcnearney
* Confirm that shallow `model.copy()` does make a shallow copy of attributes, 1383 by samuelcolvin
* Renaming `model_name` argument of `main.create_model()` to `__model_name` to allow using `model_name` as a field name, 1367 by kittipatv
* Replace raising of exception to silent passing  for non-Var attributes in mypy plugin, 1345 by b0g3r
* Remove `typing_extensions` dependency for python 3.8, 1342 by prettywood
* Make `SecretStr` and `SecretBytes` initialization idempotent, 1330 by atheuz
* document making secret types dumpable using the json method, 1328 by atheuz
* Move all testing and build to github actions, add windows and macos binaries,
thank you StephenBrown2 for much help, 1326 by samuelcolvin
* fix card number length check in `PaymentCardNumber`, `PaymentCardBrand` now inherits from `str`, 1317 by samuelcolvin
* Have `BaseModel` inherit from `Representation` to make mypy happy when overriding `__str__`, 1310 by FuegoFro
* Allow `None` as input to all optional list fields, 1307 by prettywood
* Add `datetime` field to `default_factory` example, 1301 by StephenBrown2
* Allow subclasses of known types to be encoded with superclass encoder, 1291 by StephenBrown2
* Exclude exported fields from all elements of a list/tuple of submodels/dicts with `'__all__'`, 1286 by masalim2
* Add pydantic.color.Color objects as available input for Color fields, 1258 by leosussan
* In examples, type nullable fields as `Optional`, so that these are valid mypy annotations, 1248 by kokes
* Make `pattern_validator()` accept pre-compiled `Pattern` objects. Fix `str_validator()` return type to `str`, 1237 by adamgreg
* Document how to manage Generics and inheritance, 1229 by esadruhn
* `update_forward_refs()` method of BaseModel now copies `__dict__` of class module instead of modyfying it, 1228 by paul-ilyin
* Support instance methods and class methods with `validate_arguments`, 1222 by samuelcolvin
* Add `default_factory` argument to `Field` to create a dynamic default value by passing a zero-argument callable, 1210 by prettywood
* add support for `NewType` of `List`, `Optional`, etc, 1207 by Kazy
* fix mypy signature for `root_validator`, 1192 by samuelcolvin
* Fixed parsing of nested 'custom root type' models, 1190 by Shados
* Add `validate_arguments` function decorator which checks the arguments to a function matches type annotations, 1179 by samuelcolvin
* Add `__signature__` to models, 1034 by MrMrRobat
* Refactor `._iter()` method, 10x speed boost for `dict(model)`, 1017 by MrMrRobat


* **Breaking Change:** alias precedence logic changed so aliases on a field always take priority over
an alias from `alias_generator` to avoid buggy/unexpected behaviour,
see [here]( for details, 1178 by samuelcolvin
* Add support for unicode and punycode in TLDs, 1182 by jamescurtin
* Fix `cls` argument in validators during assignment, 1172 by samuelcolvin
* completing Luhn algorithm for `PaymentCardNumber`, 1166 by cuencandres
* add support for generics that implement `__get_validators__` like a custom data type, 1159 by tiangolo
* add support for infinite generators with `Iterable`, 1152 by tiangolo
* fix `url_regex` to accept schemas with `+`, `-` and `.` after the first character, 1142 by samuelcolvin
* move `version_info()` to ``, suggest its use in issues, 1138 by samuelcolvin
* Improve pydantic import time by roughly 50% by deferring some module loading and regex compilation, 1127 by samuelcolvin
* Fix `EmailStr` and `NameEmail` to accept instances of themselves in cython, 1126 by koxudaxi
* Pass model class to the `Config.schema_extra` callable, 1125 by therefromhere
* Fix regex for username and password in URLs, 1115 by samuelcolvin
* Add support for nested generic models, 1104 by dmontagu
* add `__all__` to `` to prevent "implicit reexport" errors from mypy, 1072 by samuelcolvin
* Add support for using "dotenv" files with `BaseSettings`, 1011 by acnebs


* Change `schema` and `schema_model` to handle dataclasses by using their `__pydantic_model__` feature, 792 by aviramha
* Added option for `root_validator` to be skipped if values validation fails using keyword `skip_on_failure=True`, 1049 by aviramha
* Allow `Config.schema_extra` to be a callable so that the generated schema can be post-processed, 1054 by selimb
* Update mypy to version 0.750, 1057 by dmontagu
* Trick Cython into allowing str subclassing, 1061 by skewty
* Prevent type attributes being added to schema unless the attribute `__schema_attributes__` is `True`, 1064 by samuelcolvin
* Change `BaseModel.parse_file` to use `Config.json_loads`, 1067 by kierandarcy
* Fix for optional `Json` fields, 1073 by volker48
* Change the default number of threads used when compiling with cython to one,
allow override via the `CYTHON_NTHREADS` environment variable, 1074 by samuelcolvin
* Run FastAPI tests during Pydantic's CI tests, 1075 by tiangolo
* My mypy strictness constraints, and associated tweaks to type annotations, 1077 by samuelcolvin
* Add `__eq__` to SecretStr and SecretBytes to allow "value equals", 1079 by sbv-trueenergy
* Fix schema generation for nested None case, 1088 by lutostag
* Consistent checks for sequence like objects, 1090 by samuelcolvin
* Fix `Config` inheritance on `BaseSettings` when used with `env_prefix`, 1091 by samuelcolvin
* Fix for `__modify_schema__` when it conflicted with `field_class_to_schema*`, 1102 by samuelcolvin
* docs: Fix explanation of case sensitive environment variable names when populating `BaseSettings` subclass attributes, 1105 by tribals
* Rename django-rest-framework benchmark in documentation, 1119 by frankie567


* **Possible Breaking Change:** Add support for required `Optional` with `name: Optional[AnyType] = Field(...)`
and refactor `ModelField` creation to preserve `required` parameter value, 1031 by tiangolo;
see [here]( for details
* Add benchmarks for `cattrs`, 513 by sebastianmika
* Add `exclude_none` option to `dict()` and friends, 587 by niknetniko
* Add benchmarks for `valideer`, 670 by gsakkis
* Add `parse_obj_as` and `parse_file_as` functions for ad-hoc parsing of data into arbitrary pydantic-compatible types, 934 by dmontagu
* Add `allow_reuse` argument to validators, thus allowing validator reuse, 940 by dmontagu
* Add support for mapping types for custom root models, 958 by dmontagu
* Mypy plugin support for dataclasses, 966 by koxudaxi
* Add support for dataclasses default factory, 968 by ahirner
* Add a `ByteSize` type for converting byte string (`1GB`) to plain bytes, 977 by dgasmith
* Fix mypy complaint about `root_validator(pre=True)`, 984 by samuelcolvin
* Add manylinux binaries for python 3.8 to pypi, also support manylinux2010, 994 by samuelcolvin
* Adds ByteSize conversion to another unit, 995 by dgasmith
* Fix `__str__` and `__repr__` inheritance for models, 1022 by samuelcolvin
* add testimonials section to docs, 1025 by sullivancolin
* Add support for `typing.Literal` for Python 3.8, 1026 by dmontagu


* Fix bug where use of complex fields on sub-models could cause fields to be incorrectly configured, 1015 by samuelcolvin


* Add a mypy plugin for type checking `BaseModel.__init__` and more, 722 by dmontagu
* Change return type typehint for `GenericModel.__class_getitem__` to prevent PyCharm warnings, 936 by dmontagu
* Fix usage of `Any` to allow `None`, also support `TypeVar` thus allowing use of un-parameterised collection types
e.g. `Dict` and `List`, 962 by samuelcolvin
* Set `FieldInfo` on subfields to fix schema generation for complex nested types, 965 by samuelcolvin


* **Breaking Change:** deprecate the `Model.fields` property, use `Model.__fields__` instead, 883 by samuelcolvin
* **Breaking Change:** Change the precedence of aliases so child model aliases override parent aliases,
including using `alias_generator`, 904 by samuelcolvin
* **Breaking change:** Rename `skip_defaults` to `exclude_unset`, and add ability to exclude actual defaults, 915 by dmontagu
* Add `**kwargs` to `pydantic.main.ModelMetaclass.__new__` so `__init_subclass__` can take custom parameters on extended
`BaseModel` classes, 867 by retnikt
* Fix field of a type that has a default value, 880 by koxudaxi
* Use `FutureWarning` instead of `DeprecationWarning` when `alias` instead of `env` is used for settings models, 881 by samuelcolvin
* Fix issue with `BaseSettings` inheritance and `alias` getting set to `None`, 882 by samuelcolvin
* Modify `__repr__` and `__str__` methods to be consistent across all public classes, add `__pretty__` to support
python-devtools, 884 by samuelcolvin
* deprecation warning for `case_insensitive` on `BaseSettings` config, 885 by samuelcolvin
* For `BaseSettings` merge environment variables and in-code values recursively, as long as they create a valid object
when merged together, to allow splitting init arguments, 888 by idmitrievsky
* change secret types example, 890 by ashears
* Change the signature of `Model.construct()` to be more user-friendly, document `construct()` usage, 898 by samuelcolvin
* Add example for the `construct()` method, 907 by ashears
* Improve use of `Field` constraints on complex types, raise an error if constraints are not enforceable,
also support tuples with an ellipsis `Tuple[X, ...]`, `Sequence` and `FrozenSet` in schema, 909 by samuelcolvin
* update docs for bool missing valid value, 911 by trim21
* Better `str`/`repr` logic for `ModelField`, 912 by samuelcolvin
* Fix `ConstrainedList`, update schema generation to reflect `min_items` and `max_items` `Field()` arguments, 917 by samuelcolvin
* Allow abstracts sets (eg. dict keys) in the `include` and `exclude` arguments of `dict()`, 921 by samuelcolvin
* Fix JSON serialization errors on `ValidationError.json()` by using `pydantic_encoder`, 922 by samuelcolvin
* Clarify usage of `remove_untouched`, improve error message for types with no validators, 926 by retnikt


* Mark `StrictBool` typecheck as `bool` to allow for default values without mypy errors, 690 by dmontagu
* Transfer the documentation build from sphinx to mkdocs, re-write much of the documentation, 856 by samuelcolvin
* Add support for custom naming schemes for `GenericModel` subclasses, 859 by dmontagu
* Add `if TYPE_CHECKING:` to the excluded lines for test coverage, 874 by dmontagu
* Rename `allow_population_by_alias` to `allow_population_by_field_name`, remove unnecessary warning about it, 875 by samuelcolvin


* **Breaking Change:** rename `Schema` to `Field`, make it a function to placate mypy, 577 by samuelcolvin
* **Breaking Change:** modify parsing behavior for `bool`, 617 by dmontagu
* **Breaking Change:** `get_validators` is no longer recognised, use `__get_validators__`.
`Config.ignore_extra` and `Config.allow_extra` are no longer recognised, use `Config.extra`, 720 by samuelcolvin
* **Breaking Change:** modify default config settings for `BaseSettings`; `case_insensitive` renamed to `case_sensitive`,
default changed to `case_sensitive = False`, `env_prefix` default changed to `''` - e.g. no prefix, 721 by dmontagu
* **Breaking change:** Implement `root_validator` and rename root errors from `__obj__` to `__root__`, 729 by samuelcolvin
* **Breaking Change:** alter the behaviour of `dict(model)` so that sub-models are nolonger
converted to dictionaries, 733 by samuelcolvin
* **Breaking change:** Added `initvars` support to `post_init_post_parse`, 748 by Raphael-C-Almeida
* **Breaking Change:** Make `BaseModel.json()` only serialize the `__root__` key for models with custom root, 752 by dmontagu
* **Breaking Change:** complete rewrite of `URL` parsing logic, 755 by samuelcolvin
* **Breaking Change:** preserve superclass annotations for field-determination when not provided in subclass, 757 by dmontagu
* **Breaking Change:** `BaseSettings` now uses the special `env` settings to define which environment variables to
read, not aliases, 847 by samuelcolvin
* add support for `assert` statements inside validators, 653 by abdusco
* Update documentation to specify the use of `pydantic.dataclasses.dataclass` and subclassing `pydantic.BaseModel`, 710 by maddosaurus
* Allow custom JSON decoding and encoding via `json_loads` and `json_dumps` `Config` properties, 714 by samuelcolvin
* make all annotated fields occur in the order declared, 715 by dmontagu
* use pytest to test `mypy` integration, 735 by dmontagu
* add `__repr__` method to `ErrorWrapper`, 738 by samuelcolvin
* Added support for `FrozenSet` members in dataclasses, and a better error when attempting to use types from the `typing` module that are not supported by Pydantic, 745 by djpetti
* add documentation for Pycharm Plugin, 750 by koxudaxi
* fix broken examples in the docs, 753 by dmontagu
* moving typing related objects into `pydantic.typing`, 761 by samuelcolvin
* Minor performance improvements to `ErrorWrapper`, `ValidationError` and datetime parsing, 763 by samuelcolvin
* Improvements to `datetime`/`date`/`time`/`timedelta` types: more descriptive errors,
change errors to `value_error` not `type_error`, support bytes, 766 by samuelcolvin
* fix error messages for `Literal` types with multiple allowed values, 770 by dmontagu
* Improved auto-generated `title` field in JSON schema by converting underscore to space, 772 by skewty
* support `mypy --no-implicit-reexport` for dataclasses, also respect `--no-implicit-reexport` in pydantic itself, 783 by samuelcolvin
* add the `PaymentCardNumber` type, 790 by matin
* Fix const validations for lists, 794 by hmvp
* Set `additionalProperties` to false in schema for models with extra fields disallowed, 796 by Code0x58
* `EmailStr` validation method now returns local part case-sensitive per RFC 5321, 798 by henriklindgren
* Added ability to validate strictness to `ConstrainedFloat`, `ConstrainedInt` and `ConstrainedStr` and added
`StrictFloat` and `StrictInt` classes, 799 by DerRidda
* Improve handling of `None` and `Optional`, replace `whole` with `each_item` (inverse meaning, default `False`)
on validators, 803 by samuelcolvin
* add support for `Type[T]` type hints, 807 by timonbimon
* Performance improvements from removing `change_exceptions`, change how pydantic error are constructed, 819 by samuelcolvin
* Fix the error message arising when a `BaseModel`-type model field causes a `ValidationError` during parsing, 820 by dmontagu
* allow `getter_dict` on `Config`, modify `GetterDict` to be more like a `Mapping` object and thus easier to work with, 821 by samuelcolvin
* Only check `TypeVar` param on base `GenericModel` class, 842 by zpencerq
* rename `Model._schema_cache` -> `Model.__schema_cache__`, `Model._json_encoder` -> `Model.__json_encoder__`,
`Model._custom_root_type` -> `Model.__custom_root_type__`, 851 by samuelcolvin


(Docs are available [here](

* fix `__post_init__` usage with dataclass inheritance, fix 739 by samuelcolvin
* fix required fields validation on GenericModels classes, 742 by amitbl
* fix defining custom `Schema` on `GenericModel` fields, 754 by amitbl


* do not validate extra fields when `validate_assignment` is on, 724 by YaraslauZhylko


* add model name to `ValidationError` error message, 676 by dmontagu
* **breaking change**: remove `__getattr__` and rename `__values__` to `__dict__` on `BaseModel`,
deprecation warning on use `__values__` attr, attributes access speed increased up to 14 times, 712 by MrMrRobat
* support `ForwardRef` (without self-referencing annotations) in Python 3.6, 706 by koxudaxi
* implement `schema_extra` in `Config` sub-class, 663 by tiangolo


* fix json generation for `EnumError`, 697 by dmontagu
* update numerous dependencies


* better support for floating point `multiple_of` values, 652 by justindujardin
* fix schema generation for `NewType` and `Literal`, 649 by dmontagu
* fix `alias_generator` and field config conflict, 645 by gmetzker and 658 by MrMrRobat
* more detailed message for `EnumError`, 673 by dmontagu
* add advanced exclude support for `dict`, `json` and `copy`, 648 by MrMrRobat
* fix bug in `GenericModel` for models with concrete parameterized fields, 672 by dmontagu
* add documentation for `Literal` type, 651 by dmontagu
* add `Config.keep_untouched` for custom descriptors support, 679 by MrMrRobat
* use `inspect.cleandoc` internally to get model description, 657 by tiangolo
* add `Color` to schema generation, by euri10
* add documentation for Literal type, 651 by dmontagu


* fix so nested classes which inherit and change `__init__` are correctly processed while still allowing `self` as a
parameter, 644 by lnaden and dgasmith


* enforce single quotes in code, 612 by samuelcolvin
* fix infinite recursion with dataclass inheritance and `__post_init__`, 606 by Hanaasagi
* fix default values for `GenericModel`, 610 by dmontagu
* clarify that self-referencing models require python 3.7+, 616 by vlcinsky
* fix truncate for types, 611 by dmontagu
* add `alias_generator` support, 622 by MrMrRobat
* fix unparameterized generic type schema generation, 625 by dmontagu
* fix schema generation with multiple/circular references to the same model, 621 by tiangolo and wongpat
* support custom root types, 628 by koxudaxi
* support `self` as a field name in `parse_obj`, 632 by samuelcolvin


* support dataclasses.InitVar, 592 by pfrederiks
* Updated documentation to elucidate the usage of `Union` when defining multiple types under an attribute's
annotation and showcase how the type-order can affect marshalling of provided values, 594 by somada141
* add `conlist` type, 583 by hmvp
* add support for generics, 595 by dmontagu


* fix support for JSON Schema generation when using models with circular references in Python 3.7, 572 by tiangolo
* support `__post_init_post_parse__` on dataclasses, 567 by sevaho
* allow dumping dataclasses to JSON, 575 by samuelcolvin and DanielOberg
* ORM mode, 562 by samuelcolvin
* fix `pydantic.compiled` on ipython, 573 by dmontagu and samuelcolvin
* add `StrictBool` type, 579 by cazgp


* **breaking change**  `_pydantic_post_init` to execute dataclass' original `__post_init__` before
validation, 560 by HeavenVolkoff
* fix handling of generic types without specified parameters, 550 by dmontagu
* **breaking change** (maybe): this is the first release compiled with **cython**, see the docs and please
submit an issue if you run into problems


* fix JSON Schema for `list`, `tuple`, and `set`, 540 by tiangolo
* compiling with cython, `manylinux` binaries, some other performance improvements, 548 by samuelcolvin


* fix to schema generation for `IPvAnyAddress`, `IPvAnyInterface`, `IPvAnyNetwork` 498 by pilosus
* fix variable length tuples support, 495 by pilosus
* fix return type hint for `create_model`, 526 by dmontagu
* **Breaking Change:** fix `.dict(skip_keys=True)` skipping values set via alias (this involves changing
`validate_model()` to always returns `Tuple[Dict[str, Any], Set[str], Optional[ValidationError]]`), 517 by sommd
* fix to schema generation for `IPv4Address`, `IPv6Address`, `IPv4Interface`,
`IPv6Interface`, `IPv4Network`, `IPv6Network` 532 by euri10
* add `Color` type, 504 by pilosus and samuelcolvin


* Improve documentation on self-referencing models and annotations, 487 by theenglishway
* fix `.dict()` with extra keys, 490 by JaewonKim
* support `const` keyword in `Schema`, 434 by Sean1708


* fix handling `ForwardRef` in sub-types, like `Union`, 464 by tiangolo
* fix secret serialization, 465 by atheuz
* Support custom validators for dataclasses, 454 by primal100
* fix `parse_obj` to cope with dict-like objects, 472 by samuelcolvin
* fix to schema generation in nested dataclass-based models, 474 by NoAnyLove
* fix `json` for `Path`, `FilePath`, and `DirectoryPath` objects, 473 by mikegoodspeed


* improve documentation for contributing section, 441 by pilosus
* improve README.rst to include essential information about the package, 446 by pilosus
* `IntEnum` support, 444 by potykion
* fix PyObject callable value, 409 by pilosus
* fix `black` deprecation warnings after update, 451 by pilosus
* fix `ForwardRef` collection bug, 450 by tigerwings
* Support specialized `ClassVars`, 455 by tyrylu
* fix JSON serialization for `ipaddress` types, 333 by pilosus
* add `SecretStr` and `SecretBytes` types, 452 by atheuz


* add `IPv{4,6,Any}Network` and `IPv{4,6,Any}Interface` types from `ipaddress` stdlib, 333 by pilosus
* add docs for `datetime` types, 386 by pilosus
* fix to schema generation in dataclass-based models, 408 by pilosus
* fix path in nested models, 437 by kataev
* add `Sequence` support, 304 by pilosus


* fix typo in `NoneIsNotAllowedError` message, 414 by YaraslauZhylko
* add `IPvAnyAddress`, `IPv4Address` and `IPv6Address` types, 333 by pilosus


* fix type hints of `parse_obj` and similar methods, 405 by erosennin
* fix submodel validation, 403 by samuelcolvin
* correct type hints for `ValidationError.json`, 406 by layday


* fix tests for python 3.8, 396 by samuelcolvin
* Adds fields to the `dir` method for autocompletion in interactive sessions, 398 by dgasmith
* support `ForwardRef` (and therefore `from __future__ import annotations`) with dataclasses, 397 by samuelcolvin


* **breaking change** (maybe): more sophisticated argument parsing for validators, any subset of
`values`, `config` and `field` is now permitted, eg. `(cls, value, field)`,
however the variadic key word argument ("`**kwargs`") **must** be called `kwargs`, 388 by samuelcolvin
* **breaking change**: Adds `skip_defaults` argument to `BaseModel.dict()` to allow skipping of fields that
were not explicitly set, signature of `Model.construct()` changed, 389 by dgasmith
* add `py.typed` marker file for PEP-561 support, 391 by je-l
* Fix `extra` behaviour for multiple inheritance/mix-ins, 394 by YaraslauZhylko


* Support `Callable` type hint, fix 279 by proofit404
* Fix schema for fields with `validator` decorator, fix 375 by tiangolo
* Add `multiple_of` constraint to `ConstrainedDecimal`, `ConstrainedFloat`, `ConstrainedInt`
and their related types `condecimal`, `confloat`, and `conint` 371, thanks StephenBrown2
* Deprecated `ignore_extra` and `allow_extra` Config fields in favor of `extra`, 352 by liiight
* Add type annotations to all functions, test fully with mypy, 373 by samuelcolvin
* fix for 'missing' error with `validate_all` or `validate_always`, 381 by samuelcolvin
* Change the second/millisecond watershed for date/datetime parsing to `2e10`, 385 by samuelcolvin


* Fix to schema generation with `Optional` fields, fix 361 by samuelcolvin


* add `ConstrainedBytes` and `conbytes` types, 315 Gr1N
* adding `` to include license in package `.tar.gz`, 358 by samuelcolvin


* **breaking change**: don't call validators on keys of dictionaries, 254 by samuelcolvin
* Fix validators with `always=True` when the default is `None` or the type is optional, also prevent
`whole` validators being called for sub-fields, fix 132 by samuelcolvin
* improve documentation for settings priority and allow it to be easily changed, 343 by samuelcolvin
* fix `ignore_extra=False` and `allow_population_by_alias=True`, fix 257 by samuelcolvin
* **breaking change**: Set `BaseConfig` attributes `min_anystr_length` and `max_anystr_length` to
`None` by default, fix 349 in 350 by tiangolo
* add support for postponed annotations, 348 by samuelcolvin


* fix schema for `timedelta` as number, 325 by tiangolo
* prevent validators being called repeatedly after inheritance, 327 by samuelcolvin
* prevent duplicate validator check in ipython, fix 312 by samuelcolvin
* add "Using Pydantic" section to docs, 323 by tiangolo & 326 by samuelcolvin
* fix schema generation for fields annotated as `: dict`, `: list`,
`: tuple` and `: set`, 330 & 335 by nkonin
* add support for constrained strings as dict keys in schema, 332 by tiangolo
* support for passing Config class in dataclasses decorator, 276 by jarekkar
(**breaking change**: this supersedes the `validate_assignment` argument with `config`)
* support for nested dataclasses, 334 by samuelcolvin
* better errors when getting an `ImportError` with `PyObject`, 309 by samuelcolvin
* rename `get_validators` to `__get_validators__`, deprecation warning on use of old name, 338 by samuelcolvin
* support `ClassVar` by excluding such attributes from fields, 184 by samuelcolvin


* fix `create_model` to correctly use the passed `__config__`, 320 by hugoduncan


* **breaking change**: refactor schema generation to be compatible with JSON Schema and OpenAPI specs, 308 by tiangolo
* add `schema` to `schema` module to generate top-level schemas from base models, 308 by tiangolo
* add additional fields to `Schema` class to declare validation for `str` and numeric values, 311 by tiangolo
* rename `_schema` to `schema` on fields, 318 by samuelcolvin
* add `case_insensitive` option to `BaseSettings` `Config`, 277 by jasonkuhrt


* move codebase to use black, 287 by samuelcolvin
* fix alias use in settings, 286 by jasonkuhrt and samuelcolvin
* fix datetime parsing in `parse_date`, 298 by samuelcolvin
* allow dataclass inheritance, fix 293 by samuelcolvin
* fix `PyObject = None`, fix 305 by samuelcolvin
* allow `Pattern` type, fix 303 by samuelcolvin


* dataclasses decorator, 269 by Gaunt and samuelcolvin


* fix issue where int_validator doesn't cast a `bool` to an `int` 264 by nphyatt
* add deep copy support for `BaseModel.copy()` 249, gangefors


* raise an exception if a field's name shadows an existing `BaseModel` attribute 242
* add `UrlStr` and `urlstr` types 236
* timedelta json encoding ISO8601 and total seconds, custom json encoders 247, by cfkanesan and samuelcolvin
* allow `timedelta` objects as values for properties of type `timedelta` (matches `datetime` etc. behavior) 247


* fix schema generation for fields defined using `typing.Any` 237


* add `by_alias` argument in `.dict()` and `.json()` model methods 205
* add Json type support 214
* support tuples 227
* major improvements and changes to schema 213


* add `NewType` support 115
* fix `list`, `set` & `tuple` validation 225
* separate out `validate_model` method, allow errors to be returned along with valid values 221


* support Python 3.7 216, thanks layday
* Allow arbitrary types in model 209, thanks oldPadavan


* make `list`, `tuple` and `set` types stricter 86
* **breaking change**: remove msgpack parsing 201
* add `FilePath` and `DirectoryPath` types 10
* model schema generation 190
* JSON serialisation of models and schemas 133


* add `Config.allow_population_by_alias` 160, thanks bendemaree
* **breaking change**: new errors format 179, thanks Gr1N
* **breaking change**: removed `Config.min_number_size` and `Config.max_number_size` 183, thanks Gr1N
* **breaking change**: correct behaviour of `lt` and `gt` arguments to `conint` etc. 188
for the old behaviour use `le` and `ge` 194, thanks jaheba
* added error context and ability to redefine error message templates using `Config.error_msg_templates` 183,
thanks Gr1N
* fix typo in validator exception 150
* copy defaults to model values, so different models don't share objects 154


* allow custom `get_field_config` on config classes 159
* add `UUID1`, `UUID3`, `UUID4` and `UUID5` types 167, thanks Gr1N
* modify some inconsistent docstrings and annotations 173, thanks YannLuo
* fix type annotations for exotic types 171, thanks Gr1N
* re-use type validators in exotic types 171
* scheduled monthly requirements updates 168
* add `Decimal`, `ConstrainedDecimal` and `condecimal` types 170, thanks Gr1N


* tweak email-validator import error message 145
* fix parse error of `parse_date()` and `parse_datetime()` when input is 0 144, thanks YannLuo
* add `Config.anystr_strip_whitespace` and `strip_whitespace` kwarg to `constr`,
by default values is `False` 163, thanks Gr1N
* add `ConstrainedFloat`, `confloat`, `PositiveFloat` and `NegativeFloat` types 166, thanks Gr1N


* fix type annotation for `inherit_config` 139
* **breaking change**: check for invalid field names in validators 140
* validate attributes of parent models 141
* **breaking change**: email validation now uses
[email-validator]( 142


* fix bug with `create_model` modifying the base class


* added compatibility with abstract base classes (ABCs) 123
* add `create_model` method 113 125
* **breaking change**: rename `.config` to `.__config__` on a model
* **breaking change**: remove deprecated `.values()` on a model, use `.dict()` instead
* remove use of `OrderedDict` and use simple dict 126
* add `Config.use_enum_values` 127
* add wildcard validators of the form `validate('*')` 128


* allow python date and times objects 122


* fix direct install without `README.rst` present


* errors for invalid validator use
* safer check for complex models in `Settings`


* prevent duplicate validators, 101
* add `always` kwarg to validators, 102


* assignment validation 94, thanks petroswork!
* JSON in environment variables for complex types, 96
* add `validator` decorators for complex validation, 97
* depreciate `values(...)` and replace with `.dict(...)`, 99


* add `UUID` validation 89
* remove `index` and `track` from error object (json) if they're null 90
* improve the error text when a list is provided rather than a dict 90
* add benchmarks table to docs 91


* show length in string validation error
* fix aliases in config during inheritance 55
* simplify error display
* use unicode ellipsis in `truncate`
* add `parse_obj`, `parse_raw` and `parse_file` helper functions 58
* switch annotation only fields to come first in fields list not last


* immutable models via `config.allow_mutation = False`, associated cleanup and performance improvement 44
* immutable helper methods `construct()` and `copy()` 53
* allow pickling of models 53
* `setattr` is removed as `__setattr__` is now intelligent 44
* `raise_exception` removed, Models now always raise exceptions 44
* instance method validators removed
* django-restful-framework benchmarks added 47
* fix inheritance bug 49
* make str type stricter so list, dict etc are not coerced to strings. 52
* add `StrictStr` which only always strings as input 52


* pypi and travis together messed up the deploy of `v0.2` this should fix it


* **breaking change**: `values()` on a model is now a method not a property,
takes `include` and `exclude` arguments
* allow annotation only fields to support mypy
* add pretty `to_string(pretty=True)` method for models


* add docs
* add history