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38 changes: 38 additions & 0 deletions .github/workflows/samples-typescript-express-zod.yaml
Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
name: TypeScript Express Zod

on:
pull_request:
paths:
- samples/server/petstore/typescript-express-zod-server/**
- samples/client/petstore/typescript-express-zod-client/**
- .github/workflows/samples-typescript-express-zod.yaml
jobs:
build:
name: Test TypeScript Express Zod
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
sample:
# server
- samples/server/petstore/typescript-express-zod-server
# client
- samples/client/petstore/typescript-express-zod-client
node-version:
- 20
- 22
steps:
- uses: actions/checkout@v7

- uses: actions/setup-node@v5
with:
node-version: ${{ matrix.node-version }}

- name: Install
working-directory: ${{ matrix.sample }}
run: |
npm i

- name: Test
working-directory: ${{ matrix.sample }}
run: npm run test
6 changes: 6 additions & 0 deletions bin/configs/typescript-express-zod-client.yaml
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@@ -0,0 +1,6 @@
generatorName: typescript
outputDir: samples/client/petstore/typescript-express-zod-client/builds/default
inputSpec: modules/openapi-generator/src/test/resources/3_0/typescript-express-zod/petstore.yaml
additionalProperties:
framework: express-zod
hideGenerationTimestamp: "true"
5 changes: 5 additions & 0 deletions bin/configs/typescript-express-zod-server.yaml
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@@ -0,0 +1,5 @@
generatorName: typescript-express-zod-server
outputDir: samples/server/petstore/typescript-express-zod-server/builds/default
inputSpec: modules/openapi-generator/src/test/resources/3_0/typescript-express-zod/petstore.yaml
additionalProperties:
hideGenerationTimestamp: "true"
1 change: 1 addition & 0 deletions docs/generators.md
Original file line number Diff line number Diff line change
Expand Up @@ -158,6 +158,7 @@ The following generators are available:
* [scala-play-server](generators/scala-play-server.md)
* [scalatra](generators/scalatra.md)
* [spring](generators/spring.md)
* [typescript-express-zod-server (experimental)](generators/typescript-express-zod-server.md)
* [typescript-nestjs-server (beta)](generators/typescript-nestjs-server.md)


Expand Down
290 changes: 290 additions & 0 deletions docs/generators/typescript-express-zod-server.md
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---
title: Documentation for the typescript-express-zod-server Generator
---

## METADATA

| Property | Value | Notes |
| -------- | ----- | ----- |
| generator name | typescript-express-zod-server | pass this to the generate command after -g |
| generator stability | EXPERIMENTAL | |
| generator type | SERVER | |
| generator language | Typescript | |
| generator default templating engine | mustache | |
| helpTxt | Generates a TypeScript Express server with Zod validation. | |

## CONFIG OPTIONS
These options may be applied as additional-properties (cli) or configOptions (plugins). Refer to [configuration docs](https://openapi-generator.tech/docs/configuration) for more details.

| Option | Description | Values | Default |
| ------ | ----------- | ------ | ------- |
|allowUnicodeIdentifiers|boolean, toggles whether unicode identifiers are allowed in names or not, default is false| |false|
|disallowAdditionalPropertiesIfNotPresent|If false, the 'additionalProperties' implementation (set to true by default) is compliant with the OAS and JSON schema specifications. If true (default), keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.|<dl><dt>**false**</dt><dd>The 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications.</dd><dt>**true**</dt><dd>Keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.</dd></dl>|true|
|ensureUniqueParams|Whether to ensure parameter names are unique in an operation (rename parameters that are not).| |true|
|enumNameSuffix|Suffix that will be appended to all enum names.| |Enum|
|enumPropertyNaming|Naming convention for enum properties: 'camelCase', 'PascalCase', 'snake_case', 'UPPERCASE', and 'original'| |PascalCase|
|enumPropertyNamingReplaceSpecialChar|Set to true to replace '-' and '+' symbols with 'minus_' and 'plus_' in enum of type string| |false|
|enumUnknownDefaultCase|If the server adds new enum cases, that are unknown by an old spec/client, the client will fail to parse the network response. With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the server sends an enum case that is not known by the client/spec, they can safely fallback to this case.|<dl><dt>**false**</dt><dd>No changes to the enums are made, this is the default option.</dd><dt>**true**</dt><dd>With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the enum case sent by the server is not known by the client/spec, can safely be decoded to this case.</dd></dl>|false|
|legacyDiscriminatorBehavior|Set to false for generators with better support for discriminators. (Python, Java, Go, PowerShell, C# have this enabled by default).|<dl><dt>**true**</dt><dd>The mapping in the discriminator includes descendent schemas that allOf inherit from self and the discriminator mapping schemas in the OAS document.</dd><dt>**false**</dt><dd>The mapping in the discriminator includes any descendent schemas that allOf inherit from self, any oneOf schemas, any anyOf schemas, any x-discriminator-values, and the discriminator mapping schemas in the OAS document AND Codegen validates that oneOf and anyOf schemas contain the required discriminator and throws an error if the discriminator is missing.</dd></dl>|true|
|licenseName|The name of the license| |Unlicense|
|modelPropertyNaming|Naming convention for the property: 'camelCase', 'PascalCase', 'snake_case' and 'original', which keeps the original name. Only change it if you provide your own run-time code for (de-)serialization of models| |original|
|npmName|The name under which you want to publish generated npm package. Required to generate a full package| |null|
|npmVersion|The version of your npm package. If not provided, using the version from the OpenAPI specification file.| |1.0.0|
|nullSafeAdditionalProps|Set to make additional properties types declare that their indexer may return undefined| |false|
|paramNaming|Naming convention for parameters: 'camelCase', 'PascalCase', 'snake_case' and 'original', which keeps the original name| |camelCase|
|prependFormOrBodyParameters|Add form or body parameters to the beginning of the parameter list.| |false|
|snapshot|When setting this property to true, the version will be suffixed with -SNAPSHOT.yyyyMMddHHmm| |false|
|sortModelPropertiesByRequiredFlag|Sort model properties to place required parameters before optional parameters.| |true|
|sortParamsByRequiredFlag|Sort method arguments to place required parameters before optional parameters.| |true|
|supportsES6|Generate code that conforms to ES6.| |false|

## IMPORT MAPPING

| Type/Alias | Imports |
| ---------- | ------- |


## INSTANTIATION TYPES

| Type/Alias | Instantiated By |
| ---------- | --------------- |
|array|Array|


## LANGUAGE PRIMITIVES

<ul class="column-ul">
<li>Array</li>
<li>Awaited</li>
<li>Boolean</li>
<li>Capitalize</li>
<li>ConstructorParameters</li>
<li>Date</li>
<li>Double</li>
<li>Error</li>
<li>Exclude</li>
<li>Extract</li>
<li>File</li>
<li>Float</li>
<li>InstanceType</li>
<li>Integer</li>
<li>Long</li>
<li>Lowercase</li>
<li>Map</li>
<li>NoInfer</li>
<li>NonNullable</li>
<li>Object</li>
<li>Omit</li>
<li>OmitThisParameter</li>
<li>Parameters</li>
<li>Partial</li>
<li>Pick</li>
<li>Readonly</li>
<li>ReadonlyArray</li>
<li>Record</li>
<li>Required</li>
<li>ReturnType</li>
<li>Set</li>
<li>String</li>
<li>ThisParameterType</li>
<li>ThisType</li>
<li>Uncapitalize</li>
<li>Uppercase</li>
<li>any</li>
<li>boolean</li>
<li>number</li>
<li>object</li>
<li>string</li>
</ul>

## RESERVED WORDS

<ul class="column-ul">
<li>abstract</li>
<li>await</li>
<li>boolean</li>
<li>break</li>
<li>byte</li>
<li>case</li>
<li>catch</li>
<li>char</li>
<li>class</li>
<li>const</li>
<li>continue</li>
<li>debugger</li>
<li>default</li>
<li>delete</li>
<li>do</li>
<li>double</li>
<li>else</li>
<li>enum</li>
<li>export</li>
<li>extends</li>
<li>false</li>
<li>final</li>
<li>finally</li>
<li>float</li>
<li>for</li>
<li>formParams</li>
<li>function</li>
<li>goto</li>
<li>headerParams</li>
<li>if</li>
<li>implements</li>
<li>import</li>
<li>in</li>
<li>instanceof</li>
<li>int</li>
<li>interface</li>
<li>let</li>
<li>long</li>
<li>native</li>
<li>new</li>
<li>null</li>
<li>package</li>
<li>private</li>
<li>protected</li>
<li>public</li>
<li>queryParameters</li>
<li>requestOptions</li>
<li>return</li>
<li>short</li>
<li>static</li>
<li>super</li>
<li>switch</li>
<li>synchronized</li>
<li>this</li>
<li>throw</li>
<li>transient</li>
<li>true</li>
<li>try</li>
<li>typeof</li>
<li>useFormData</li>
<li>var</li>
<li>varLocalDeferred</li>
<li>varLocalPath</li>
<li>void</li>
<li>volatile</li>
<li>while</li>
<li>with</li>
<li>yield</li>
</ul>

## FEATURE SET


### Client Modification Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|BasePath|✓|ToolingExtension
|Authorizations|✗|ToolingExtension
|UserAgent|✗|ToolingExtension
|MockServer|✗|ToolingExtension

### Data Type Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Custom|✗|OAS2,OAS3
|Int32|✓|OAS2,OAS3
|Int64|✓|OAS2,OAS3
|Float|✓|OAS2,OAS3
|Double|✓|OAS2,OAS3
|Decimal|✓|ToolingExtension
|String|✓|OAS2,OAS3
|Byte|✓|OAS2,OAS3
|Binary|✓|OAS2,OAS3
|Boolean|✓|OAS2,OAS3
|Date|✓|OAS2,OAS3
|DateTime|✓|OAS2,OAS3
|Password|✓|OAS2,OAS3
|File|✓|OAS2
|Uuid|✗|
|Array|✓|OAS2,OAS3
|Null|✗|OAS3
|AnyType|✗|OAS2,OAS3
|Object|✓|OAS2,OAS3
|Maps|✓|ToolingExtension
|CollectionFormat|✓|OAS2
|CollectionFormatMulti|✓|OAS2
|Enum|✓|OAS2,OAS3
|ArrayOfEnum|✓|ToolingExtension
|ArrayOfModel|✓|ToolingExtension
|ArrayOfCollectionOfPrimitives|✓|ToolingExtension
|ArrayOfCollectionOfModel|✓|ToolingExtension
|ArrayOfCollectionOfEnum|✓|ToolingExtension
|MapOfEnum|✓|ToolingExtension
|MapOfModel|✓|ToolingExtension
|MapOfCollectionOfPrimitives|✓|ToolingExtension
|MapOfCollectionOfModel|✓|ToolingExtension
|MapOfCollectionOfEnum|✓|ToolingExtension

### Documentation Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Readme|✓|ToolingExtension
|Model|✓|ToolingExtension
|Api|✓|ToolingExtension

### Global Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Host|✓|OAS2,OAS3
|BasePath|✓|OAS2,OAS3
|Info|✓|OAS2,OAS3
|Schemes|✗|OAS2,OAS3
|PartialSchemes|✓|OAS2,OAS3
|Consumes|✓|OAS2
|Produces|✓|OAS2
|ExternalDocumentation|✓|OAS2,OAS3
|Examples|✓|OAS2,OAS3
|XMLStructureDefinitions|✗|OAS2,OAS3
|MultiServer|✗|OAS3
|ParameterizedServer|✗|OAS3
|ParameterStyling|✗|OAS3
|Callbacks|✗|OAS3
|LinkObjects|✗|OAS3

### Parameter Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Path|✓|OAS2,OAS3
|Query|✓|OAS2,OAS3
|Header|✓|OAS2,OAS3
|Body|✓|OAS2
|FormUnencoded|✓|OAS2
|FormMultipart|✓|OAS2
|Cookie|✓|OAS3

### Schema Support Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Simple|✓|OAS2,OAS3
|Composite|✓|OAS2,OAS3
|Polymorphism|✓|OAS2,OAS3
|Union|✗|OAS3
|allOf|✗|OAS2,OAS3
|anyOf|✗|OAS3
|oneOf|✗|OAS3

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P1: The Schema Support table incorrectly marks oneOf and Union as unsupported, but the generator implements discriminated-union handling (including required discriminator properties) as described in the PR. These rows should reflect support.

Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At docs/generators/typescript-express-zod-server.md, line 267:

<comment>The Schema Support table incorrectly marks `oneOf` and `Union` as unsupported, but the generator implements discriminated-union handling (including required discriminator properties) as described in the PR. These rows should reflect support.</comment>

<file context>
@@ -0,0 +1,290 @@
+|Union|✗|OAS3
+|allOf|✗|OAS2,OAS3
+|anyOf|✗|OAS3
+|oneOf|✗|OAS3
+|not|✗|OAS3
+
</file context>

|not|✗|OAS3

### Security Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|BasicAuth|✓|OAS2,OAS3

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P2: The Security Feature table overstates authentication support. Because the generated server delegates authentication to a user-supplied middleware placeholder and does not generate scheme-specific enforcement, BasicAuth, ApiKey, and OAuth2_Implicit should be marked unsupported.

Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At docs/generators/typescript-express-zod-server.md, line 273:

<comment>The Security Feature table overstates authentication support. Because the generated server delegates authentication to a user-supplied middleware placeholder and does not generate scheme-specific enforcement, BasicAuth, ApiKey, and OAuth2_Implicit should be marked unsupported.</comment>

<file context>
@@ -0,0 +1,290 @@
+### Security Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|BasicAuth|✓|OAS2,OAS3
+|ApiKey|✓|OAS2,OAS3
+|OpenIDConnect|✗|OAS3
</file context>

|ApiKey|✓|OAS2,OAS3
|OpenIDConnect|✗|OAS3
|BearerToken|✗|OAS3
|OAuth2_Implicit|✓|OAS2,OAS3
|OAuth2_Password|✗|OAS2,OAS3
|OAuth2_ClientCredentials|✗|OAS2,OAS3
|OAuth2_AuthorizationCode|✗|OAS2,OAS3
|SignatureAuth|✗|OAS3
|AWSV4Signature|✗|ToolingExtension

### Wire Format Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|JSON|✓|OAS2,OAS3
|XML|✓|OAS2,OAS3

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P2: The Wire Format table claims XML is supported, but the generated handler pipeline uses res.json() and Zod schemas tailored for JSON. Without XML serialization or content negotiation in the templates, XML should be marked unsupported.

Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At docs/generators/typescript-express-zod-server.md, line 288:

<comment>The Wire Format table claims XML is supported, but the generated handler pipeline uses `res.json()` and Zod schemas tailored for JSON. Without XML serialization or content negotiation in the templates, XML should be marked unsupported.</comment>

<file context>
@@ -0,0 +1,290 @@
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|JSON|✓|OAS2,OAS3
+|XML|✓|OAS2,OAS3
+|PROTOBUF|✗|ToolingExtension
+|Custom|✗|OAS2,OAS3
</file context>
Suggested change
|XML||OAS2,OAS3
+|XML||OAS2,OAS3

|PROTOBUF|✗|ToolingExtension
|Custom|✗|OAS2,OAS3
2 changes: 1 addition & 1 deletion docs/generators/typescript.md
Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
|enumType|Specify the enum type which should be used in the client code.|<dl><dt>**stringUnion**</dt><dd>Union of literal string types</dd><dt>**enum**</dt><dd>Typescript's [string enums](https://www.typescriptlang.org/docs/handbook/enums.html#string-enums)</dd></dl>|enum|
|enumUnknownDefaultCase|If the server adds new enum cases, that are unknown by an old spec/client, the client will fail to parse the network response. With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the server sends an enum case that is not known by the client/spec, they can safely fallback to this case.|<dl><dt>**false**</dt><dd>No changes to the enums are made, this is the default option.</dd><dt>**true**</dt><dd>With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the enum case sent by the server is not known by the client/spec, can safely be decoded to this case.</dd></dl>|false|
|fileContentDataType|Specifies the type to use for the content of a file - i.e. Blob (Browser, Deno) / Buffer (node)| |Buffer|
|framework|Specify the framework which should be used in the client code.|<dl><dt>**fetch-api**</dt><dd>fetch-api</dd><dt>**jquery**</dt><dd>jquery</dd></dl>|fetch-api|
|framework|Specify the framework which should be used in the client code.|<dl><dt>**fetch-api**</dt><dd>fetch-api</dd><dt>**jquery**</dt><dd>jquery</dd><dt>**express-zod**</dt><dd>express-zod</dd></dl>|fetch-api|
|importFileExtension|File extension to use with relative imports. Set it to '.js' or '.mjs' when using [ESM](https://nodejs.org/api/esm.html). Defaults to '.ts' when 'platform' is set to 'deno'.| |null|
|legacyDiscriminatorBehavior|Set to false for generators with better support for discriminators. (Python, Java, Go, PowerShell, C# have this enabled by default).|<dl><dt>**true**</dt><dd>The mapping in the discriminator includes descendent schemas that allOf inherit from self and the discriminator mapping schemas in the OAS document.</dd><dt>**false**</dt><dd>The mapping in the discriminator includes any descendent schemas that allOf inherit from self, any oneOf schemas, any anyOf schemas, any x-discriminator-values, and the discriminator mapping schemas in the OAS document AND Codegen validates that oneOf and anyOf schemas contain the required discriminator and throws an error if the discriminator is missing.</dd></dl>|true|
|licenseName|The name of the license| |Unlicense|
Expand Down
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