fix: add extra fields to response object & add tests

Signed-off-by: Muhammad Aaqil <[email protected]>

Author: aaqilniz

packages/filter/src/query.ts

@@ -230,6 +230,30 @@ export interface Filter<MT extends object = AnyObject> {
    * To include related objects
    */
   include?: InclusionFilter[];
+  /**
+   * return groupBy of
+   */
+  groupBy?: string[];
+  /**
+   * return sum of
+   */
+  sum?: string;
+  /**
+   * return min of
+   */
+  min?: string;
+  /**
+   * return max of
+   */
+  max?: string;
+  /**
+   * return avg of
+   */
+  avg?: string;
+  /**
+   * return count of
+   */
+  count?: string;
 }
 
 /**

packages/repository-json-schema/src/__tests__/unit/filter-json-schema.unit.ts

@@ -72,8 +72,13 @@ describe('getFilterJsonSchemaFor', () => {
       limit: 10,
       order: ['id DESC'],
       skip: 0,
+      sum: 'salary',
+      min: 'salary',
+      max: 'salary',
+      avg: 'salary',
+      count: 'salary',
+      groupBy: ['salary'],
     };
-
     expectSchemaToAllowFilter(customerFilterSchema, filter);
   });
 
@@ -560,6 +565,9 @@ class Customer extends Entity {
   @property()
   name: string;
 
+  @property()
+  salary: number;
+
   @hasMany(() => Order)
   orders?: Order[];
 }

packages/repository-json-schema/src/filter-json-schema.ts

@@ -87,7 +87,6 @@ export function getFilterJsonSchemaFor(
       type: 'integer',
       minimum: 0,
     },
-
     limit: {
       type: 'integer',
       minimum: 1,
@@ -113,11 +112,16 @@ export function getFilterJsonSchemaFor(
       type: 'string',
       examples: ['column1'],
     },
+    groupBy: {
+      type: 'array',
+      items: {
+        type: 'string',
+      },
+    },
     skip: {
       type: 'integer',
       minimum: 0,
     },
-
     order: {
       oneOf: [
         {

packages/rest/src/writer.ts

@@ -50,8 +50,19 @@ export function writeResultToResponse(
         // TODO(ritch) remove this, should be configurable
         // See https://github.com/loopbackio/loopback-next/issues/436
         response.setHeader('Content-Type', 'application/json');
+        let customResult = result;
+        if (result.length) {
+          customResult = [];
+          result.forEach((item: {[key: string]: Object[]}) => {
+            const org: {[key: string]: Object[]} = {};
+            Object.keys(item).forEach(key => {
+              org[key] = item[key];
+            });
+            customResult.push(org);
+          });
+        }
         // TODO(bajtos) handle errors - JSON.stringify can throw
-        result = JSON.stringify(result);
+        result = JSON.stringify(customResult);
       }
       break;
     default: