Fix oneOf + empty object parent case

Author: drwpow

.changeset/nice-avocados-bake.md

@@ -0,0 +1,5 @@
+---
+"openapi-typescript": patch
+---
+
+Fix oneOf handling with empty object parent type

packages/openapi-typescript/examples/github-api-next.ts

@@ -13959,7 +13959,7 @@ export interface components {
      * Organization ruleset conditions
      * @description Conditions for an organization ruleset
      */
-    "org-ruleset-conditions": Record<string, never> & ((components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-name-target"]) | (components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-id-target"]));
+    "org-ruleset-conditions": (components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-name-target"]) | (components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-id-target"]);
     /**
      * creation
      * @description Only allow users with bypass permission to create matching refs.
@@ -14177,7 +14177,7 @@ export interface components {
      * Repository Rule
      * @description A repository rule.
      */
-    "repository-rule": Record<string, never> & (components["schemas"]["repository-rule-creation"] | components["schemas"]["repository-rule-update"] | components["schemas"]["repository-rule-deletion"] | components["schemas"]["repository-rule-required-linear-history"] | components["schemas"]["repository-rule-required-deployments"] | components["schemas"]["repository-rule-required-signatures"] | components["schemas"]["repository-rule-pull-request"] | components["schemas"]["repository-rule-required-status-checks"] | components["schemas"]["repository-rule-non-fast-forward"] | components["schemas"]["repository-rule-commit-message-pattern"] | components["schemas"]["repository-rule-commit-author-email-pattern"] | components["schemas"]["repository-rule-committer-email-pattern"] | components["schemas"]["repository-rule-branch-name-pattern"] | components["schemas"]["repository-rule-tag-name-pattern"]);
+    "repository-rule": components["schemas"]["repository-rule-creation"] | components["schemas"]["repository-rule-update"] | components["schemas"]["repository-rule-deletion"] | components["schemas"]["repository-rule-required-linear-history"] | components["schemas"]["repository-rule-required-deployments"] | components["schemas"]["repository-rule-required-signatures"] | components["schemas"]["repository-rule-pull-request"] | components["schemas"]["repository-rule-required-status-checks"] | components["schemas"]["repository-rule-non-fast-forward"] | components["schemas"]["repository-rule-commit-message-pattern"] | components["schemas"]["repository-rule-commit-author-email-pattern"] | components["schemas"]["repository-rule-committer-email-pattern"] | components["schemas"]["repository-rule-branch-name-pattern"] | components["schemas"]["repository-rule-tag-name-pattern"];
     /**
      * Repository ruleset
      * @description A set of rules to apply when specified conditions are met.
@@ -19126,7 +19126,7 @@ export interface components {
      * Repository Rule
      * @description A repository rule with ruleset details.
      */
-    "repository-rule-detailed": Record<string, never> & ((components["schemas"]["repository-rule-creation"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-update"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-deletion"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-linear-history"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-deployments"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-signatures"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-pull-request"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-status-checks"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-non-fast-forward"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-message-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-author-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-committer-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-branch-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-tag-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]));
+    "repository-rule-detailed": (components["schemas"]["repository-rule-creation"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-update"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-deletion"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-linear-history"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-deployments"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-signatures"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-pull-request"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-status-checks"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-non-fast-forward"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-message-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-author-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-committer-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-branch-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-tag-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]);
     "secret-scanning-alert": {
       number?: components["schemas"]["alert-number"];
       created_at?: components["schemas"]["alert-created-at"];

packages/openapi-typescript/examples/github-api.ts

@@ -13156,7 +13156,7 @@ export interface components {
      * Organization ruleset conditions
      * @description Conditions for an organization ruleset
      */
-    "org-ruleset-conditions": Record<string, never> & ((components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-name-target"]) | (components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-id-target"]));
+    "org-ruleset-conditions": (components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-name-target"]) | (components["schemas"]["repository-ruleset-conditions"] & components["schemas"]["repository-ruleset-conditions-repository-id-target"]);
     /**
      * creation
      * @description Only allow users with bypass permission to create matching refs.
@@ -13374,7 +13374,7 @@ export interface components {
      * Repository Rule
      * @description A repository rule.
      */
-    "repository-rule": Record<string, never> & (components["schemas"]["repository-rule-creation"] | components["schemas"]["repository-rule-update"] | components["schemas"]["repository-rule-deletion"] | components["schemas"]["repository-rule-required-linear-history"] | components["schemas"]["repository-rule-required-deployments"] | components["schemas"]["repository-rule-required-signatures"] | components["schemas"]["repository-rule-pull-request"] | components["schemas"]["repository-rule-required-status-checks"] | components["schemas"]["repository-rule-non-fast-forward"] | components["schemas"]["repository-rule-commit-message-pattern"] | components["schemas"]["repository-rule-commit-author-email-pattern"] | components["schemas"]["repository-rule-committer-email-pattern"] | components["schemas"]["repository-rule-branch-name-pattern"] | components["schemas"]["repository-rule-tag-name-pattern"]);
+    "repository-rule": components["schemas"]["repository-rule-creation"] | components["schemas"]["repository-rule-update"] | components["schemas"]["repository-rule-deletion"] | components["schemas"]["repository-rule-required-linear-history"] | components["schemas"]["repository-rule-required-deployments"] | components["schemas"]["repository-rule-required-signatures"] | components["schemas"]["repository-rule-pull-request"] | components["schemas"]["repository-rule-required-status-checks"] | components["schemas"]["repository-rule-non-fast-forward"] | components["schemas"]["repository-rule-commit-message-pattern"] | components["schemas"]["repository-rule-commit-author-email-pattern"] | components["schemas"]["repository-rule-committer-email-pattern"] | components["schemas"]["repository-rule-branch-name-pattern"] | components["schemas"]["repository-rule-tag-name-pattern"];
     /**
      * Repository ruleset
      * @description A set of rules to apply when specified conditions are met.
@@ -20981,7 +20981,7 @@ export interface components {
      * Repository Rule
      * @description A repository rule with ruleset details.
      */
-    "repository-rule-detailed": Record<string, never> & ((components["schemas"]["repository-rule-creation"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-update"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-deletion"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-linear-history"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-deployments"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-signatures"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-pull-request"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-status-checks"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-non-fast-forward"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-message-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-author-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-committer-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-branch-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-tag-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]));
+    "repository-rule-detailed": (components["schemas"]["repository-rule-creation"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-update"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-deletion"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-linear-history"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-deployments"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-signatures"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-pull-request"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-required-status-checks"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-non-fast-forward"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-message-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-commit-author-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-committer-email-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-branch-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]) | (components["schemas"]["repository-rule-tag-name-pattern"] & components["schemas"]["repository-rule-ruleset-info"]);
     "secret-scanning-alert": {
       number?: components["schemas"]["alert-number"];
       created_at?: components["schemas"]["alert-created-at"];

packages/openapi-typescript/src/transform/schema-object.ts

@@ -71,7 +71,7 @@ export function defaultSchemaObjectTransform(schemaObject: SchemaObject | Refere
   }
 
   // oneOf (no discriminator)
-  const oneOf = ((typeof schemaObject === "object" && !schemaObject.discriminator && (schemaObject as any).oneOf) || schemaObject.enum || undefined) as (SchemaObject | ReferenceObject)[] | undefined; // note: for objects, treat enum as oneOf
+  const oneOf = ((typeof schemaObject === "object" && !schemaObject.discriminator && schemaObject.oneOf) || schemaObject.enum || undefined) as (SchemaObject | ReferenceObject)[] | undefined; // note: for objects, treat enum as oneOf
   if (oneOf && !oneOf.some((t) => "$ref" in t && ctx.discriminators[t.$ref])) {
     const oneOfNormalized = oneOf.map((item) => transformSchemaObject(item, { path, ctx }));
     if (schemaObject.nullable) oneOfNormalized.push("null");
@@ -86,7 +86,7 @@ export function defaultSchemaObjectTransform(schemaObject: SchemaObject | Refere
     const oneOfTypes = oneOfNormalized.some((t) => typeof t === "string" && t.includes("{")) ? tsOneOf(...oneOfNormalized) : tsUnionOf(...oneOfNormalized);
 
     // handle oneOf + object type
-    if ("type" in schemaObject && schemaObject.type === "object") {
+    if ("type" in schemaObject && schemaObject.type === "object" && (schemaObject.properties || schemaObject.additionalProperties)) {
       return tsIntersectionOf(transformSchemaObject({ ...schemaObject, oneOf: undefined, enum: undefined } as any, { path, ctx }), oneOfTypes);
     }
 
@@ -226,19 +226,19 @@ export function defaultSchemaObjectTransform(schemaObject: SchemaObject | Refere
     return output;
   }
   // oneOf (discriminator)
-  if ("oneOf" in schemaObject && Array.isArray(schemaObject.oneOf)) {
+  if (Array.isArray(schemaObject.oneOf) && schemaObject.oneOf.length) {
     const oneOfType = tsUnionOf(...collectCompositions(schemaObject.oneOf));
     finalType = finalType ? tsIntersectionOf(finalType, oneOfType) : oneOfType;
   } else {
     // allOf
-    if ("allOf" in schemaObject && Array.isArray(schemaObject.allOf)) {
-      finalType = tsIntersectionOf(...(finalType ? [finalType] : []), ...collectCompositions(schemaObject.allOf));
+    if (Array.isArray((schemaObject as any).allOf) && schemaObject.allOf!.length) {
+      finalType = tsIntersectionOf(...(finalType ? [finalType] : []), ...collectCompositions(schemaObject.allOf!));
       if ("required" in schemaObject && Array.isArray(schemaObject.required)) {
         finalType = tsWithRequired(finalType, schemaObject.required);
       }
     }
     // anyOf
-    if ("anyOf" in schemaObject && Array.isArray(schemaObject.anyOf)) {
+    if (Array.isArray(schemaObject.anyOf) && schemaObject.anyOf.length) {
       const anyOfTypes = tsUnionOf(...collectCompositions(schemaObject.anyOf));
       finalType = finalType ? tsIntersectionOf(finalType, anyOfTypes) : anyOfTypes;
     }

packages/openapi-typescript/src/types.ts

@@ -432,9 +432,12 @@ export type SchemaObject = {
   format?: string;
   /** @deprecated in 3.1 (still valid for 3.0) */
   nullable?: boolean;
+  oneOf?: (SchemaObject | ReferenceObject)[];
+  allOf?: (SchemaObject | ReferenceObject)[];
+  anyOf?: (SchemaObject | ReferenceObject)[];
+  required?: string[];
   [key: `x-${string}`]: any;
 } & (
-  | { oneOf: (SchemaObject | ReferenceObject)[] }
   | StringSubtype
   | NumberSubtype
   | IntegerSubtype
@@ -443,8 +446,6 @@ export type SchemaObject = {
   | NullSubtype
   | ObjectSubtype
   | { type: ("string" | "number" | "integer" | "array" | "boolean" | "null" | "object")[] }
-  | { allOf: (SchemaObject | ReferenceObject)[]; anyOf?: (SchemaObject | ReferenceObject)[]; required?: string[] }
-  | { allOf?: (SchemaObject | ReferenceObject)[]; anyOf: (SchemaObject | ReferenceObject)[]; required?: string[] }
   // eslint-disable-next-line @typescript-eslint/ban-types
   | {}
 );

packages/openapi-typescript/test/schema-object.test.ts

@@ -374,6 +374,48 @@ describe("Schema Object", () => {
         expect(generated).toBe("0 | 1");
       });
 
+      test("empty object + oneOf is ignored", () => {
+        const schema: SchemaObject = {
+          type: "object",
+          oneOf: [
+            {
+              title: "DetailsId",
+              type: "object",
+              required: ["id"],
+              properties: {
+                id: { type: "string", description: "The ID of an existing resource that exists before the pipeline is run." },
+              },
+            },
+            {
+              title: "DetailsFrom",
+              type: "object",
+              required: ["from"],
+              properties: {
+                from: {
+                  type: "object",
+                  description: "The stage and step to report on.",
+                  required: ["step"],
+                  properties: { stage: { type: "string", description: "An identifier for the stage the step being reported on resides in." }, step: { type: "string", description: "An identifier for the step to be reported on." } },
+                },
+              },
+            },
+          ],
+        };
+        const generated = transformSchemaObject(schema, options);
+        expect(generated).toBe(`OneOf<[{
+  /** @description The ID of an existing resource that exists before the pipeline is run. */
+  id: string;
+}, {
+  /** @description The stage and step to report on. */
+  from: {
+    /** @description An identifier for the stage the step being reported on resides in. */
+    stage?: string;
+    /** @description An identifier for the step to be reported on. */
+    step: string;
+  };
+}]>`);
+      });
+
       test("nullable: true", () => {
         const schema: SchemaObject = { nullable: true, oneOf: [{ type: "integer" }, { type: "string" }] };
         const generated = transformSchemaObject(schema, options);
@@ -719,8 +761,8 @@ describe("ReferenceObject", () => {
           properties: { string: { type: "string" } },
           "x-extension": true,
         },
-        options
-      )
+        options,
+      ),
     ).toBe("{\n  string?: string;\n}");
   });
 });