diff --git a/__test__/3.0/LDFCore.ts b/__test__/3.0/LDFCore.ts
index f6384b6..f139f33 100644
--- a/__test__/3.0/LDFCore.ts
+++ b/__test__/3.0/LDFCore.ts
@@ -3426,7 +3426,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -3513,8 +3513,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/Petstore.ts b/__test__/3.0/Petstore.ts
index abae137..466738f 100644
--- a/__test__/3.0/Petstore.ts
+++ b/__test__/3.0/Petstore.ts
@@ -396,7 +396,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -483,8 +483,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/api-auth.ts b/__test__/3.0/api-auth.ts
index 01b2ee6..c364c59 100644
--- a/__test__/3.0/api-auth.ts
+++ b/__test__/3.0/api-auth.ts
@@ -272,7 +272,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -359,8 +359,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/api-upms.ts b/__test__/3.0/api-upms.ts
index b3835e5..099e1c3 100644
--- a/__test__/3.0/api-upms.ts
+++ b/__test__/3.0/api-upms.ts
@@ -487,7 +487,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -574,8 +574,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/api-with-examples.ts b/__test__/3.0/api-with-examples.ts
index e4d8156..390462d 100644
--- a/__test__/3.0/api-with-examples.ts
+++ b/__test__/3.0/api-with-examples.ts
@@ -193,7 +193,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -280,8 +280,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/callback-example.ts b/__test__/3.0/callback-example.ts
index 07ddd84..5a710be 100644
--- a/__test__/3.0/callback-example.ts
+++ b/__test__/3.0/callback-example.ts
@@ -189,7 +189,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -276,8 +276,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/link-example.ts b/__test__/3.0/link-example.ts
index 554d79d..a108c86 100644
--- a/__test__/3.0/link-example.ts
+++ b/__test__/3.0/link-example.ts
@@ -210,7 +210,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -297,8 +297,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/petstore-expanded.ts b/__test__/3.0/petstore-expanded.ts
index 7efdb5d..fa39de8 100644
--- a/__test__/3.0/petstore-expanded.ts
+++ b/__test__/3.0/petstore-expanded.ts
@@ -220,7 +220,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -307,8 +307,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.0/uspto.ts b/__test__/3.0/uspto.ts
index 7e189b7..e3c8caf 100644
--- a/__test__/3.0/uspto.ts
+++ b/__test__/3.0/uspto.ts
@@ -233,7 +233,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -320,8 +320,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }
diff --git a/__test__/3.1/webhook-example.ts b/__test__/3.1/webhook-example.ts
index a844ad5..6d1706a 100644
--- a/__test__/3.1/webhook-example.ts
+++ b/__test__/3.1/webhook-example.ts
@@ -189,7 +189,7 @@ export class Runtime implements IRuntime {
       // @ts-ignore ignore error
       this[method] = (url: string, config?: IRuntimeRequestCommonOptions = {}) => {
         return this.request({
-          method: method.toUpperCase(),
+          method: method.toUpperCase() as Uppercase<string>,
           url,
           ...config,
         });
@@ -276,8 +276,14 @@ export class Runtime implements IRuntime {
     if (config.query) {
       for (const key in config.query) {
         const value = config.query[key];
-        if (value !== undefined) {
-          url.searchParams.append(key, value);
+        if (value !== undefined && value !== null) {
+          if (Object.prototype.toString.call(value) === '[object Object]') {
+            url.searchParams.append(key, JSON.stringify(value));
+          } else if (Array.isArray(value)) {
+            value.forEach(v => url.searchParams.append(key, v))
+          } else {
+            url.searchParams.append(key, value);
+          }
         }
       }
     }