:mega: Build dart types from Swagger/OpenAPI schemas

SwaggerDartCodeGenerator is a code generator that looks for *.swagger files and builds .swagger.dart files, based on the schema. Code generation based on Chopper and JsonAnnotation models and can be configured for your needs.

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Overview

In general case for each .swagger file three outputs will be created.
.dart generated by Swagger dart code generator, contains all models, requests, converters, etc.
Since v1.2.0 .enums.dart generated by Swagger dart code generator, contains all enums and enums mappings.
.chopper.dart - generated by chopper.
.g.dart - generated by json_serializable.

Installation

Add the following to your pubspec.yaml file to be able to do code generation:

dev_dependencies:
  chopper_generator: ^3.0.5
  json_annotation: ^3.0.1
  json_serializable: ^3.4.1
  swagger_dart_code_generator: any

The generated code uses the following packages in run-time:

dependencies:
  chopper: ^3.0.3

Then run:

pub packages get

or

flutter packages get

Now SwaggerGenerator will generate the API files for you by running:

pub run build_runner build

or

flutter pub run build_runner build

Configuration

Swagger generator offers some configuration options to generate code. All options should be included on build.yaml file on the root of the project:

targets:
  $default:
    builders:
      swagger_dart_code_generator:
        options:
          # custom configuration options!

Option	Default value	Is required	Description
use_inheritance	true	false	Enables and disables extends keyword.
with_base_url	true	false	If this option is false, generator will ignore base url in swagger file.
use_required_attribute_for_headers	true	false	If this option is false, generator will not add @required attribute to headers.
with_converter	true	false	If option is true, combination of all mappings will be generated.
ignore_headers	false	false	If option is true, headers will not be generated.
use_path_for_request_names	false	false	If property == false, then method name == operationId ?? path+methodType. If true - only path+methodType.
enums_case_sensitive	true	false	If value is false, 'enumValue' will be defined like Enum.enumValue even it's json key equals 'ENUMVALUE'
use_default_null_for_lists	false	false	If option is true, default value for lists will be null, otherwise - []
build_only_models	false	false	If option is true, chopper classes will not be generated.
include_if_null	null	false	Enables or disables includeIfNull JsonAnnotation feature and sets value for it. See IncludeIfNull.
default_values_map	[]	false	Contains map of types and theirs default values. See DefaultValueMap.
response_override_value_map	[]	false	Contains map of responses and theirs overridden values. See ResponseOverrideValueMap.
input_folder	-	true	Path to folder with .swagger files (for ex. swagger_examples, or lib/swaggers).
output_folder	-	true	Path to output folder (for ex. lib/generated).

It's important to remember that, by default, build will follow Dart's package layout conventions, meaning that only some folders will be considered to parse the input files. So, if you want to reference files from a folder other than lib/, make sure you've included it on sources:

targets:
  $default:
    sources:
      - lib/**
      - swagger_examples/**
      - swaggers/**

IncludeIfNull for model generation

This option is used to add includeIfEmpty annotation for model fields. If option not enabled or empty - includeIfNull annotation will not added to fields. For mode details see official documentation Please see next example:

targets:
  $default:
    builders:
      swagger_dart_code_generator:
        options:
          input_folder: 'lib/swaggers'
          output_folder: 'lib/generated_code/'
          include_if_null:
            enabled: true
            value: false

Default Value Map for model generation

If you want to add defaultValue: attribute to fields with concrete type you can use default value map. Please see next example:

targets:
  $default:
    builders:
      swagger_dart_code_generator:
        options:
          input_folder: 'lib/swaggers'
          output_folder: 'lib/generated_code/'
          default_values_map:
            - type_name: int
              default_value: '36'
            - type_name: String
              default_value: 'default'
            - type_name: 'List<String>'
              default_value: '[]'

Response Override Value Map for requests generation

If you want to override response for concrete request, you can use response_override_value_map. For example:

targets:
  $default:
    builders:
      swagger_dart_code_generator:
        options:
          input_folder: 'lib/swaggers'
          output_folder: 'lib/generated_code/'
          response_override_value_map:
            - url: '/store/inventory'
              method: get
              overridden_value: 'List<dynamic>'
              - url: '/news/latest'
              method: put
              overridden_value: 'MyPerfectType'

Check the examples to see how to use it in details.

Libraries

swagger_to_flutter