feat(transformers): add support for discriminator/oneOf schemas

packages/openapi-ts-tests/main/test/3.1.x.test.ts

@@ -787,6 +787,14 @@ describe(`OpenAPI ${version}`, () => {
       }),
       description: 'transforms an array',
     },
+    {
+      config: createConfig({
+        input: 'transformers-discriminator-one-of.json',
+        output: 'transformers-discriminator-one-of',
+        plugins: ['@hey-api/client-fetch', '@hey-api/transformers'],
+      }),
+      description: 'transforms discriminated union with oneOf',
+    },
     {
       config: createConfig({
         input: 'type-invalid.json',

packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/plugins/@hey-api/transformers/type-format-valibot/transformers.gen.ts

@@ -8,6 +8,8 @@ export const postFooResponseTransformer = async (data: any): Promise<PostFooResp
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = BigInt(data.foo.toString());
+    if (data.foo) {
+        data.foo = BigInt(data.foo.toString());
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/plugins/@hey-api/transformers/type-format-zod/transformers.gen.ts

@@ -8,6 +8,8 @@ export const postFooResponseTransformer = async (data: any): Promise<PostFooResp
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = BigInt(data.foo.toString());
+    if (data.foo) {
+        data.foo = BigInt(data.foo.toString());
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/plugins/@hey-api/transformers/type-format-valibot/transformers.gen.ts

@@ -8,6 +8,8 @@ export const postFooResponseTransformer = async (data: any): Promise<PostFooResp
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = BigInt(data.foo.toString());
+    if (data.foo) {
+        data.foo = BigInt(data.foo.toString());
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/plugins/@hey-api/transformers/type-format-zod/transformers.gen.ts

@@ -8,6 +8,8 @@ export const postFooResponseTransformer = async (data: any): Promise<PostFooResp
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = BigInt(data.foo.toString());
+    if (data.foo) {
+        data.foo = BigInt(data.foo.toString());
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/transformers-all-of/transformers.gen.ts

@@ -8,22 +8,28 @@ export const getFooResponseTransformer = async (data: any): Promise<GetFooRespon
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = data.foo.map((item: any) => {
-        return barSchemaResponseTransformer(item);
-    });
+    if (data.foo) {
+        data.foo = data.foo.map((item: any) => {
+            return barSchemaResponseTransformer(item);
+        });
+    }
     return data;
 };
 
 const barSchemaResponseTransformer = (data: any) => {
-    data.foo = data.foo.map((item: any) => {
-        return bazSchemaResponseTransformer(item);
-    });
+    if (data.foo) {
+        data.foo = data.foo.map((item: any) => {
+            return bazSchemaResponseTransformer(item);
+        });
+    }
     return data;
 };
 
 const bazSchemaResponseTransformer = (data: any) => {
     data = quxSchemaResponseTransformer(data);
-    data.bar = new Date(data.bar);
+    if (data.bar) {
+        data.bar = new Date(data.bar);
+    }
     return data;
 };
 

packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/transformers-array/transformers.gen.ts

@@ -3,9 +3,13 @@
 import type { GetFooResponse } from './types.gen';
 
 export const getFooResponseTransformer = async (data: any): Promise<GetFooResponse> => {
-    data.foo = data.foo.map((item: any) => {
-        item.baz = new Date(item.baz);
-        return item;
-    });
+    if (data.foo) {
+        data.foo = data.foo.map((item: any) => {
+            if (item.baz) {
+                item.baz = new Date(item.baz);
+            }
+            return item;
+        });
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/plugins/@hey-api/transformers/type-format-valibot/transformers.gen.ts

@@ -8,6 +8,8 @@ export const postFooResponseTransformer = async (data: any): Promise<PostFooResp
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = BigInt(data.foo.toString());
+    if (data.foo) {
+        data.foo = BigInt(data.foo.toString());
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/plugins/@hey-api/transformers/type-format-zod/transformers.gen.ts

@@ -8,6 +8,8 @@ export const postFooResponseTransformer = async (data: any): Promise<PostFooResp
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = BigInt(data.foo.toString());
+    if (data.foo) {
+        data.foo = BigInt(data.foo.toString());
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/transformers-all-of/transformers.gen.ts

@@ -8,22 +8,28 @@ export const getFooResponseTransformer = async (data: any): Promise<GetFooRespon
 };
 
 const fooSchemaResponseTransformer = (data: any) => {
-    data.foo = data.foo.map((item: any) => {
-        return barSchemaResponseTransformer(item);
-    });
+    if (data.foo) {
+        data.foo = data.foo.map((item: any) => {
+            return barSchemaResponseTransformer(item);
+        });
+    }
     return data;
 };
 
 const barSchemaResponseTransformer = (data: any) => {
-    data.foo = data.foo.map((item: any) => {
-        return bazSchemaResponseTransformer(item);
-    });
+    if (data.foo) {
+        data.foo = data.foo.map((item: any) => {
+            return bazSchemaResponseTransformer(item);
+        });
+    }
     return data;
 };
 
 const bazSchemaResponseTransformer = (data: any) => {
     data = quxSchemaResponseTransformer(data);
-    data.bar = new Date(data.bar);
+    if (data.bar) {
+        data.bar = new Date(data.bar);
+    }
     return data;
 };
 

packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/transformers-array/transformers.gen.ts

@@ -3,9 +3,13 @@
 import type { GetFooResponse } from './types.gen';
 
 export const getFooResponseTransformer = async (data: any): Promise<GetFooResponse> => {
-    data.foo = data.foo.map((item: any) => {
-        item.baz = new Date(item.baz);
-        return item;
-    });
+    if (data.foo) {
+        data.foo = data.foo.map((item: any) => {
+            if (item.baz) {
+                item.baz = new Date(item.baz);
+            }
+            return item;
+        });
+    }
     return data;
 };

packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/transformers-discriminator-one-of/client.gen.ts

@@ -0,0 +1,16 @@
+// This file is auto-generated by @hey-api/openapi-ts
+
+import { type ClientOptions, type Config, createClient, createConfig } from './client';
+import type { ClientOptions as ClientOptions2 } from './types.gen';
+
+/**
+ * The `createClientConfig()` function will be called on client initialization
+ * and the returned object will become the client's initial configuration.
+ *
+ * You may want to initialize your client this way instead of calling
+ * `setConfig()`. This is useful for example if you're using Next.js
+ * to ensure your client always has the correct values.
+ */
+export type CreateClientConfig<T extends ClientOptions = ClientOptions2> = (override?: Config<ClientOptions & T>) => Config<Required<ClientOptions> & T>;
+
+export const client = createClient(createConfig<ClientOptions2>());