[typescript-angular]: objects as query parameters no longer break when fields are null (#5197)

* #5174 fix [BUG] [typescript-angular]: objects as query parameters break when fields are null

* #5174 Shell scripts run

* #5174 Code style fix

* #5174 Regenerate typescript-angular samples

* #5174 Regenerate typescript-angular samples a second time

modules/openapi-generator/src/main/resources/typescript-angular/api.service.mustache

@@ -160,7 +160,11 @@ export class {{classname}} {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/default/api/pet.service.ts

@@ -213,7 +213,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/default/api/store.service.ts

@@ -125,7 +125,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/default/api/user.service.ts

@@ -195,7 +195,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/npm/api/pet.service.ts

@@ -213,7 +213,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/npm/api/store.service.ts

@@ -125,7 +125,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/npm/api/user.service.ts

@@ -195,7 +195,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/with-interfaces/api/pet.service.ts

@@ -216,7 +216,11 @@ export class PetService implements PetServiceInterface {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/with-interfaces/api/store.service.ts

@@ -128,7 +128,11 @@ export class StoreService implements StoreServiceInterface {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v2/with-interfaces/api/user.service.ts

@@ -198,7 +198,11 @@ export class UserService implements UserServiceInterface {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v4.3/npm/api/pet.service.ts

@@ -70,7 +70,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v4.3/npm/api/store.service.ts

@@ -56,7 +56,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v4.3/npm/api/user.service.ts

@@ -56,7 +56,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v4/npm/api/pet.service.ts

@@ -213,7 +213,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v4/npm/api/store.service.ts

@@ -125,7 +125,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v4/npm/api/user.service.ts

@@ -195,7 +195,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-not-provided-in-root/builds/default/api/pet.service.ts

@@ -70,7 +70,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-not-provided-in-root/builds/default/api/store.service.ts

@@ -56,7 +56,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-not-provided-in-root/builds/default/api/user.service.ts

@@ -56,7 +56,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-not-provided-in-root/builds/with-npm/api/pet.service.ts

@@ -70,7 +70,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-not-provided-in-root/builds/with-npm/api/store.service.ts

@@ -56,7 +56,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-not-provided-in-root/builds/with-npm/api/user.service.ts

@@ -56,7 +56,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-provided-in-root/builds/default/api/pet.service.ts

@@ -72,7 +72,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-provided-in-root/builds/default/api/store.service.ts

@@ -58,7 +58,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-provided-in-root/builds/default/api/user.service.ts

@@ -58,7 +58,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-provided-in-root/builds/with-npm/api/pet.service.ts

@@ -72,7 +72,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-provided-in-root/builds/with-npm/api/store.service.ts

@@ -58,7 +58,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v6-provided-in-root/builds/with-npm/api/user.service.ts

@@ -58,7 +58,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-not-provided-in-root/builds/default/api/pet.service.ts

@@ -70,7 +70,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-not-provided-in-root/builds/default/api/store.service.ts

@@ -56,7 +56,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-not-provided-in-root/builds/default/api/user.service.ts

@@ -56,7 +56,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-not-provided-in-root/builds/with-npm/api/pet.service.ts

@@ -70,7 +70,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-not-provided-in-root/builds/with-npm/api/store.service.ts

@@ -56,7 +56,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-not-provided-in-root/builds/with-npm/api/user.service.ts

@@ -56,7 +56,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-provided-in-root/builds/default/api/pet.service.ts

@@ -72,7 +72,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-provided-in-root/builds/default/api/store.service.ts

@@ -58,7 +58,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-provided-in-root/builds/default/api/user.service.ts

@@ -58,7 +58,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-provided-in-root/builds/with-npm/api/pet.service.ts

@@ -72,7 +72,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-provided-in-root/builds/with-npm/api/store.service.ts

@@ -58,7 +58,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v7-provided-in-root/builds/with-npm/api/user.service.ts

@@ -58,7 +58,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/single-request-parameter/api/pet.service.ts

@@ -109,7 +109,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/single-request-parameter/api/store.service.ts

@@ -70,7 +70,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/single-request-parameter/api/user.service.ts

@@ -88,7 +88,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/with-npm/api/pet.service.ts

@@ -72,7 +72,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/with-npm/api/store.service.ts

@@ -58,7 +58,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/with-npm/api/user.service.ts

@@ -58,7 +58,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/with-prefixed-module-name/api/pet.service.ts

@@ -72,7 +72,11 @@ export class PetService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/with-prefixed-module-name/api/store.service.ts

@@ -58,7 +58,11 @@ export class StoreService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));

samples/client/petstore/typescript-angular-v8-provided-in-root/builds/with-prefixed-module-name/api/user.service.ts

@@ -58,7 +58,11 @@ export class UserService {
         return httpParams;
     }
 
-    private addToHttpParamsRecursive(httpParams: HttpParams, value: any, key?: string): HttpParams {
+    private addToHttpParamsRecursive(httpParams: HttpParams, value?: any, key?: string): HttpParams {
+        if (value == null) {
+            return httpParams;
+        }
+
         if (typeof value === "object") {
             if (Array.isArray(value)) {
                 (value as any[]).forEach( elem => httpParams = this.addToHttpParamsRecursive(httpParams, elem, key));