Opteo · Lewis-Clayton · Aug 8, 2025 · Aug 7, 2025 · Aug 7, 2025 · Jul 31, 2025
diff --git a/.prettierrc.js b/.prettierrc.js
@@ -0,0 +1,12 @@
+module.exports = {
+  printWidth: 80,
+  tabWidth: 2,
+  useTabs: false,
+  semi: true,
+  singleQuote: false,
+  trailingComma: 'es5',
+  bracketSpacing: true,
+  //arrowParens: 'avoid',
+  rangeStart: 0,
+  rangeEnd: Infinity,
+};
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,28 @@
 # Changelog
 
+### 21.0.0-
+
+### Version Upgrade
+
+- Upgraded google-ads-api version to v21. Refer to Google ads release notes [here](https://developers.google.com/google-ads/api/docs/release-notes) for changes.
+- Upgraded google-ads-node dependency to v18.0.0
+
+### Bug Fixes
+
+- Fixed parsing of FieldMask fields (like `changed_fields`) in REST API responses ([#519](https://github.com/Opteo/google-ads-api/issues/519))
+  - REST API returns FieldMask fields as comma-separated strings (e.g., `"field1,field2"`) which were not being properly parsed
+  - Now correctly converts them to objects with a `paths` array format: `{ paths: ["field1", "field2"] }`
+  - Handles case conversion from camelCase to snake_case to maintain consistency with the rest of the library
+  - Properly processes nested paths (e.g., `"ipBlock.ipAddress"` → `"ip_block.ip_address"`)
+  - The `changed_fields` field now works correctly and follows the same naming conventions as the rest of the library
+
+### Library Changes
+
+- Updated enum definitions to support Google Ads API v21 changes
+- Enhanced parser test coverage with additional test cases for change events and FieldMask fields
+- Added `skipLibCheck` to TypeScript configuration for faster compilation
+- Added prettier configuration for consistent code formatting
+
 ### 20.0.1
 
 ### Version Upgrade

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "google-ads-api",
-  "version": "20.0.1",
+  "version": "21.0.0",
   "description": "Google Ads API Client Library for Node.js",
   "repository": "https://github.com/Opteo/google-ads-api",
   "main": "build/src/index.js",
@@ -21,17 +21,17 @@
     "@isaacs/ttlcache": "^1.2.2",
     "axios": "^1.6.7",
     "circ-json": "^1.0.4",
-    "google-ads-node": "17.0.1",
+    "google-ads-node": "18.0.0",
     "google-auth-library": "^9.15.1",
-    "google-gax": "^5.1.1-rc.1",
+    "google-gax": "^5.0.1",
     "long": "^4.0.0",
     "map-obj": "^4.0.0",
     "stream-json": "^1.8.0"
   },
   "devDependencies": {
     "@types/jest": "^29.0.1",
-    "@types/long": "^4.0.0",
     "@types/lodash": "^4.14.202",
+    "@types/long": "^4.0.0",
     "@types/node": "^22.5.4",
     "@types/pluralize": "^0.0.29",
     "@types/stream-json": "^1.7.7",
@@ -43,6 +43,7 @@
     "jest": "^29.7.0",
     "lodash": "^4.17.21",
     "pluralize": "^8.0.0",
+    "prettier": "^3.6.2",
     "protobufjs": "^7.2.6",
     "ts-jest": "^29.1.2",
     "tsx": "^4.19.3",

diff --git a/scripts/resourceName.ts b/scripts/resourceName.ts
@@ -37,9 +37,10 @@ export interface Text {
   function: string; // "export function accountBudget(customerId: string | number, accountBudgetId: string | number): AccountBudgetResourceName { return `customers/${customerId}/accountBudgets/${accountBudgetId}` as const }"
 }
 
-export function generateTextParts(
-  pathTemplate: PathTemplate
-): { parts: Parts; comments: Comments } {
+export function generateTextParts(pathTemplate: PathTemplate): {
+  parts: Parts;
+  comments: Comments;
+} {
   const resource = pathTemplate.path.replace(/PathTemplate/g, "");
 
   const parts: Parts = {
@@ -101,13 +102,27 @@ function buildResourceNameBuilder(stream: fs.WriteStream, text: Text): void {
 export async function compileResourceNameFunctions(): Promise<void> {
   const service = new CampaignServiceClient();
 
-  // @ts-expect-error
-  const pathTemplatesRaw: { [path: string]: Omit<PathTemplate, "path"> } =
-    service.pathTemplates;
+  const pathTemplatesRaw = service.pathTemplates;
 
   const pathTemplates = Object.entries(pathTemplatesRaw).map(
-    ([path, template]: [string, Omit<PathTemplate, "path">]) => {
-      return { path, ...template };
+    ([path, template]) => {
+      // Extract bindings from segments (public property)
+      const bindings: { [key: string]: string } = {};
+      template.segments.forEach((segment) => {
+        const match = segment.match(/\{([^=}]+)(?:=([^}]+))?\}/);
+        if (match) {
+          bindings[match[1]] = match[2] || "*";
+        }
+      });
+
+      // Use inspect() to get the template string
+      const data = template.inspect();
+
+      return {
+        path,
+        bindings,
+        data,
+      };
     }
   );
 

diff --git a/src/customer.ts b/src/customer.ts
@@ -100,7 +100,10 @@ export class Customer extends ServiceFactory {
     const { gaqlQuery, requestOptions } = buildQuery({ ...options, limit: 1 });
 
     // We do not allow this field in reportOptions, however it is still a valid request option
-    requestOptions.search_settings = { return_total_results_count: true };
+    requestOptions.search_settings = {
+      return_total_results_count: true,
+      return_summary_row: false,
+    };
 
     const useHooks = false; // to avoid cacheing conflicts
     const { totalResultsCount } = await this.querier(
@@ -369,7 +372,7 @@ export class Customer extends ServiceFactory {
 
   private async querier<T = services.IGoogleAdsRow[]>(
     gaqlQuery: string,
-    requestOptions: RequestOptions = {},
+    requestOptions: RequestOptionsWithTotalResults = {},
     reportOptions?: Readonly<ReportOptions>,
     useHooks = true
   ): Promise<{ response: T; totalResultsCount?: number }> {

diff --git a/src/hooks.ts b/src/hooks.ts
@@ -39,7 +39,7 @@ type ErrorHookArgs = {
 };
 
 type EndHookArgs<
-  T = services.IGoogleAdsRow[] | services.MutateGoogleAdsResponse
+  T = services.IGoogleAdsRow[] | services.MutateGoogleAdsResponse,
 > = {
   response?: T;
   resolve: (args: any) => void;

diff --git a/src/parser.spec.ts b/src/parser.spec.ts
@@ -234,6 +234,192 @@ describe("parseRows", () => {
       },
     ]);
   });
+
+  it("handles FieldMask fields like changed_fields", () => {
+    const fields = [
+      "change_event.resource_name",
+      "change_event.changed_fields",
+    ];
+    const rows: services.IGoogleAdsRow[] = [
+      {
+        change_event: {
+          resource_name:
+            "customers/4517895542/changeEvents/1750751693628134~0~0",
+          change_date_time: "2025-06-24 08:54:53.628134",
+          change_resource_name: "customers/4517895542/campaigns/21930728598",
+          changed_fields: {
+            paths: ["campaign.target_roas.target_roas"],
+          },
+          old_resource: { campaign: { target_roas: { target_roas: 3 } } },
+          new_resource: { campaign: { target_roas: { target_roas: 3.25 } } },
+        },
+      },
+    ];
+    const result = parseRows(rows, fields);
+    expect(result).toHaveLength(1);
+    expect(result[0].change_event?.resource_name).toBe(
+      "customers/4517895542/changeEvents/1750751693628134~0~0"
+    );
+    expect(result[0].change_event?.changed_fields).toEqual({
+      paths: ["campaign.target_roas.target_roas"],
+    });
+  });
+
+  it("handles old_resource and new_resource fields in change events", () => {
+    const fields = [
+      "change_event.resource_name",
+      "change_event.old_resource",
+      "change_event.new_resource",
+    ];
+    const rows: services.IGoogleAdsRow[] = [
+      {
+        change_event: {
+          resource_name:
+            "customers/4517895542/changeEvents/1750751693628134~0~0",
+          change_date_time: "2025-06-24 08:54:53.628134",
+          change_resource_name: "customers/4517895542/campaigns/21930728598",
+          changed_fields: {
+            paths: ["campaign.target_roas.target_roas"],
+          },
+          old_resource: { campaign: { target_roas: { target_roas: 3 } } },
+          new_resource: { campaign: { target_roas: { target_roas: 3.25 } } },
+        },
+      },
+    ];
+    const result = parseRows(rows, fields);
+    expect(result).toHaveLength(1);
+    expect(result[0].change_event?.resource_name).toBe(
+      "customers/4517895542/changeEvents/1750751693628134~0~0"
+    );
+    expect(
+      result[0].change_event?.old_resource?.campaign?.target_roas?.target_roas
+    ).toBe(3);
+    expect(
+      result[0].change_event?.new_resource?.campaign?.target_roas?.target_roas
+    ).toBe(3.25);
+  });
+
+  it("handles complex nested structures in old_resource and new_resource", () => {
+    const fields = [
+      "change_event.resource_name",
+      "change_event.old_resource",
+      "change_event.new_resource",
+    ];
+    const rows: services.IGoogleAdsRow[] = [
+      {
+        change_event: {
+          resource_name:
+            "customers/4517895542/changeEvents/1750751666945610~0~0",
+          change_date_time: "2025-06-24 08:54:26.94561",
+          change_resource_name: "customers/4517895542/campaigns/17049405489",
+          changed_fields: {
+            paths: ["maximize_conversion_value.target_roas"],
+          },
+          old_resource: {
+            campaign: {
+              maximize_conversion_value: {
+                target_roas: 8,
+              },
+            },
+          },
+          new_resource: {
+            campaign: {
+              maximize_conversion_value: {
+                target_roas: 8.5,
+              },
+            },
+          },
+        },
+      },
+    ];
+    const result = parseRows(rows, fields);
+    expect(result).toHaveLength(1);
+    expect(
+      result[0].change_event?.old_resource?.campaign?.maximize_conversion_value
+        ?.target_roas
+    ).toBe(8);
+    expect(
+      result[0].change_event?.new_resource?.campaign?.maximize_conversion_value
+        ?.target_roas
+    ).toBe(8.5);
+  });
+
+  it("handles campaign criterion deletion in old_resource and new_resource", () => {
+    const fields = [
+      "change_event.resource_name",
+      "change_event.old_resource",
+      "change_event.new_resource",
+    ];
+    const rows: services.IGoogleAdsRow[] = [
+      {
+        change_event: {
+          resource_name:
+            "customers/4517895542/changeEvents/1750693690782591~0~0",
+          change_date_time: "2025-06-23 16:48:10.782591",
+          change_resource_name:
+            "customers/4517895542/campaignCriteria/21890334919~23340370",
+          changed_fields: {
+            paths: [
+              "campaign",
+              "criterion_id",
+              "keyword.match_type",
+              "keyword.text",
+              "negative",
+              "resource_name",
+              "status",
+            ],
+          },
+          old_resource: {
+            campaign_criterion: {
+              resource_name:
+                "customers/4517895542/campaignCriteria/21890334919~23340370",
+              keyword: {
+                match_type: "BROAD",
+                text: "crackle",
+              },
+              status: "ENABLED",
+              campaign: "customers/4517895542/campaigns/21890334919",
+              criterion_id: 23340370,
+              negative: true,
+            },
+          },
+          new_resource: {
+            campaign_criterion: {},
+          },
+        },
+      },
+    ];
+    const result = parseRows(rows, fields);
+    expect(result).toHaveLength(1);
+    expect(
+      result[0].change_event?.old_resource?.campaign_criterion?.resource_name
+    ).toBe("customers/4517895542/campaignCriteria/21890334919~23340370");
+    expect(
+      result[0].change_event?.old_resource?.campaign_criterion?.keyword
+        ?.match_type
+    ).toBe(4);
+    expect(
+      result[0].change_event?.old_resource?.campaign_criterion?.keyword?.text
+    ).toBe("crackle");
+    expect(
+      result[0].change_event?.old_resource?.campaign_criterion?.status
+    ).toBe(2);
+    expect(
+      result[0].change_event?.old_resource?.campaign_criterion?.campaign
+    ).toBe("customers/4517895542/campaigns/21890334919");
+    expect(
+      (
+        result[0].change_event?.old_resource?.campaign_criterion
+          ?.criterion_id as any
+      )?.low
+    ).toBe(23340370);
+    expect(
+      result[0].change_event?.old_resource?.campaign_criterion?.negative
+    ).toBe(true);
+    expect(
+      result[0].change_event?.new_resource?.campaign_criterion
+    ).toBeDefined();
+  });
 });
 
 describe("getGAQLFields", () => {

diff --git a/src/parser.ts b/src/parser.ts
@@ -106,7 +106,7 @@ export function parseRows(
       // @ts-expect-error These are the best we can do for these types
       const [parent, ...children]: [
         fields.Resource,
-        ...(keyof services.IGoogleAdsRow)[]
+        ...(keyof services.IGoogleAdsRow)[],
       ] = fieldsPreSplit[split];
 
       // Ignore null fields (unspecified resource names)

diff --git a/src/parserRest.ts b/src/parserRest.ts
@@ -71,7 +71,24 @@ const cachedValueParser = (
   if (megaDataType === undefined && !fullPath.startsWith("@")) {
     console.warn(`No data type found for ${fullPath}`);
   } else if (typeof megaDataType === "object") {
-    newValue = megaDataType[value];
+    // Special handling for FieldMask types - REST API returns them as comma-separated strings
+    if (megaDataType.paths === "STRING" && typeof value === "string") {
+      // This is a FieldMask field, convert the comma-separated string to the expected format
+      // Also convert each path from camelCase to snake_case
+      newValue = {
+        paths: value.split(",").map((p) => {
+          // Handle nested paths like "ipBlock.ipAddress"
+          return p
+            .trim()
+            .split(".")
+            .map((segment) => toSnakeCase(segment))
+            .join(".");
+        }),
+      };
+    } else {
+      // Normal enum handling
+      newValue = megaDataType[value];
+    }
   } else if (megaDataType === "INT64") {
     newValue = Number(value);
   } else if (megaDataType === "ENUM") {