datamodel-codegen(1)

usage:

datamodel-codegen [options]

Generate Python data models from schema definitions or structured data

Typing customization:

--base-class BASE_CLASS

Base Class (default: pydantic.BaseModel)

--enum-field-as-literal {all,one}

Parse enum field as literal. all: all enum field type are Literal. one: field type is Literal when an enum has only one possible value

--field-constraints

Use field constraints and not con* annotations

--set-default-enum-member

Set enum members as default values for enum field

--strict-types {str,bytes,int,float,bool} [{str,bytes,int,float,bool} ...]

Use strict types

--use-annotated

Use typing.Annotated for Field(). Also, `--fieldconstraints` option will be enabled.

--use-generic-container-types

Use generic container types for type hinting (typing.Sequence, typing.Mapping). If `--use-standardcollections` option is set, then import from collections.abc instead of typing

--use-non-positive-negative-number-constrained-types

Use the Non{Positive,Negative}{FloatInt} types instead of the corresponding con* constrained types.

--use-one-literal-as-default

Use one literal as default value for one literal field

--use-standard-collections

Use standard collections for type hinting (list, dict)

--use-subclass-enum

Define Enum class as subclass with field type when enum has type (int, float, bytes, str)

--use-union-operator

Use | operator for Union type (PEP 604).

--use-unique-items-as-set

define field type as `set` when the field attribute has `uniqueItems`

Field customization:

--capitalise-enum-members, --capitalize-enum-members

Capitalize field names on enum

--empty-enum-field-name EMPTY_ENUM_FIELD_NAME

Set field name when enum value is empty (default: `_`)

--field-extra-keys FIELD_EXTRA_KEYS [FIELD_EXTRA_KEYS ...]

Add extra keys to field parameters

--field-extra-keys-without-x-prefix FIELD_EXTRA_KEYS_WITHOUT_X_PREFIX [FIELD_EXTRA_KEYS_WITHOUT_X_PREFIX ...]

Add extra keys with `x-` prefix to field parameters. The extra keys are stripped of the `x-` prefix.

--field-include-all-keys

Add all keys to field parameters

--force-optional

Force optional for required fields

--no-alias

Do not add a field alias. E.g., if --snake-case-field is used along with a base class, which has an alias_generator

--original-field-name-delimiter ORIGINAL_FIELD_NAME_DELIMITER

Set delimiter to convert to snake case. This option only can be used with --snake-case-field (default: `_` )

--remove-special-field-name-prefix

Remove field name prefix if it has a special meaning e.g. underscores

--snake-case-field

Change camel-case field name to snake-case

--special-field-name-prefix SPECIAL_FIELD_NAME_PREFIX

Set field name prefix when first character can't be used as Python field name (default: `field`)

--strip-default-none

Strip default None on fields

--union-mode {smart,left_to_right}

Union mode for only pydantic v2 field

--use-default

Use default value even if a field is required

--use-default-kwarg

Use `default=` instead of a positional argument for Fields that have default values.

--use-field-description

Use schema description to populate field docstring

Model customization:

--allow-extra-fields

Allow to pass extra fields, if this flag is not passed, extra fields are forbidden.

--allow-population-by-field-name

Allow population by field name

--class-name CLASS_NAME

Set class name of root model

--collapse-root-models

Models generated with a root-type field will be merged into the models using that root-type model

--disable-appending-item-suffix

Disable appending `Item` suffix to model name in an array

--disable-timestamp

Disable timestamp on file headers

--enable-faux-immutability

Enable faux immutability

--enable-version-header

Enable package version on file headers

--keep-model-order

Keep generated models' order

--keyword-only

Defined models as keyword only (for example dataclass(kw_only=True)).

--output-datetime-class {datetime,AwareDatetime,NaiveDatetime}

Choose Datetime class between AwareDatetime, NaiveDatetime or datetime. Each output model has its default mapping (for example pydantic: datetime, dataclass: str, ...)

--reuse-model

Reuse models on the field when a module has the model with the same content

--target-python-version {3.6,3.7,3.8,3.9,3.10,3.11,3.12,3.13}

target python version (default: 3.8)

--treat-dot-as-module

treat dotted module names as modules

--use-exact-imports

import exact types instead of modules, for example: "from .foo import Bar" instead of "from . import foo" with "foo.Bar"

--use-pendulum

use pendulum instead of datetime

--use-schema-description

Use schema description to populate class docstring

--use-title-as-name

use titles as class names of models

Template customization:

--aliases ALIASES

Alias mapping file

--custom-file-header CUSTOM_FILE_HEADER

Custom file header

--custom-file-header-path CUSTOM_FILE_HEADER_PATH

Custom file header file path

--custom-formatters-kwargs CUSTOM_FORMATTERS_KWARGS

A file with kwargs for custom formatters.

--custom-template-dir CUSTOM_TEMPLATE_DIR

Custom template directory

--encoding ENCODING

The encoding of input and output (default: utf-8)

--extra-template-data EXTRA_TEMPLATE_DATA

Extra template data

--use-double-quotes

Model generated with double quotes. Single quotes or your black config skip_string_normalization value will be used without this option.

--wrap-string-literal

Wrap string literal by using black `experimentalstring-processing` option (require black 20.8b0 or later)

OpenAPI-only options:

--openapi-scopes {schemas,paths,tags,parameters} [{schemas,paths,tags,parameters} ...]

Scopes of OpenAPI model generation (default: schemas)

--strict-nullable

Treat default field as a non-nullable field (Only OpenAPI)

--use-operation-id-as-name

use operation id of OpenAPI as class names of models

--validation

Deprecated: Enable validation (Only OpenAPI). this option is deprecated. it will be removed in future releases

General options:

--debug

show debug message (require "debug". `$ pip install 'datamodel-code-generator[debug]'`)

--disable-warnings

disable warnings

--no-color

disable colorized output

--version

show version

-h, --help

show this help message and exit