fix(express): support no optional properties (#4733)

generators/typescript/express/cli/src/ExpressGeneratorCli.ts

@@ -5,6 +5,7 @@ import { NpmPackage, PersistedTypescriptProject } from "@fern-typescript/commons
 import { GeneratorContext } from "@fern-typescript/contexts";
 import { ExpressGenerator } from "@fern-typescript/express-generator";
 import { camelCase, upperFirst } from "lodash-es";
+import { custom } from "zod";
 import { ExpressCustomConfig } from "./custom-config/ExpressCustomConfig";
 import { ExpressCustomConfigSchema } from "./custom-config/schema/ExpressCustomConfigSchema";
 
@@ -27,7 +28,8 @@ export class ExpressGeneratorCli extends AbstractGeneratorCli<ExpressCustomConfi
             allowExtraFields: parsed?.allowExtraFields ?? false,
             skipRequestValidation: parsed?.skipRequestValidation ?? false,
             skipResponseValidation: parsed?.skipResponseValidation ?? false,
-            useBigInt: parsed?.useBigInt ?? false
+            useBigInt: parsed?.useBigInt ?? false,
+            noOptionalProperties: parsed?.noOptionalProperties ?? false
         };
     }
 
@@ -65,7 +67,8 @@ export class ExpressGeneratorCli extends AbstractGeneratorCli<ExpressCustomConfi
                 skipRequestValidation: customConfig.skipRequestValidation,
                 skipResponseValidation: customConfig.skipResponseValidation,
                 requestValidationStatusCode: customConfig.requestValidationStatusCode,
-                useBigInt: customConfig.useBigInt
+                useBigInt: customConfig.useBigInt,
+                noOptionalProperties: customConfig.noOptionalProperties
             }
         });
 

generators/typescript/express/cli/src/custom-config/ExpressCustomConfig.ts

@@ -16,4 +16,5 @@ export interface ExpressCustomConfig {
     retainOriginalCasing: boolean;
     allowExtraFields: boolean;
     useBigInt: boolean;
+    noOptionalProperties: boolean;
 }

generators/typescript/express/cli/src/custom-config/schema/ExpressCustomConfigSchema.ts

@@ -11,6 +11,7 @@ export const ExpressCustomConfigSchema = z.strictObject({
     outputEsm: z.optional(z.boolean()),
     requestValidationStatusCode: z.optional(z.number()),
     useBigInt: z.optional(z.boolean()),
+    noOptionalProperties: z.optional(z.boolean()),
 
     // beta (not in docs)
     outputSourceFiles: z.optional(z.boolean()),

generators/typescript/express/generator/src/ExpressGenerator.ts

@@ -65,6 +65,7 @@ export declare namespace ExpressGenerator {
         skipResponseValidation: boolean;
         requestValidationStatusCode: number;
         useBigInt: boolean;
+        noOptionalProperties: boolean;
     }
 }
 
@@ -187,11 +188,11 @@ export class ExpressGenerator {
             includeOtherInUnionTypes: config.includeOtherInUnionTypes,
             includeSerdeLayer: config.includeSerdeLayer,
             retainOriginalCasing: config.retainOriginalCasing,
-            noOptionalProperties: false
+            noOptionalProperties: config.noOptionalProperties
         });
         this.typeSchemaGenerator = new TypeSchemaGenerator({
             includeUtilsOnUnionMembers: config.includeUtilsOnUnionMembers,
-            noOptionalProperties: false
+            noOptionalProperties: config.noOptionalProperties
         });
         this.typeReferenceExampleGenerator = new TypeReferenceExampleGenerator();
         this.expressInlinedRequestBodyGenerator = new ExpressInlinedRequestBodyGenerator();

generators/typescript/express/versions.yml

@@ -1,3 +1,21 @@
+- changelogEntry:
+  - summary: | 
+      Introduces a configuration `noOptionalProperties` which forces consumers to explicitly pass 
+      in `undefined` instead of excluding the key. To turn this setting on, do the following: 
+
+      ```yml generators.yml
+      groups: 
+        server: 
+          generators: 
+            - name: fernapi/fern-typescript-express
+              version: 0.17.5
+              config: 
+                noOptionalProperties: true
+      ```
+    type: feat
+  irVersion: 53
+  version: 0.17.5
+
 - changelogEntry:
   - summary: Update inlined request objects to respect `noSerdeLayer`
     type: fix