Updated fields search for postgres to support array item

Signed-off-by: rdeepc <12953177+rdeepc@users.noreply.github.com>

plugins/search-backend-module-pg/src/database/DatabaseDocumentStore.test.ts

@@ -453,6 +453,12 @@ describe('DatabaseDocumentStore', () => {
               text: 'Around the world',
               location: 'LOCATION-1',
             },
+            {
+              title: 'Sed ut perspiciatis',
+              text: 'Hello World',
+              myField: ['that', 'not'],
+              location: 'LOCATION-1',
+            } as unknown as IndexableDocument,
           ]);
           await store.completeInsert(tx, 'my-type');
         });
@@ -488,6 +494,16 @@ describe('DatabaseDocumentStore', () => {
             rank: expect.any(Number),
             type: 'my-type',
           },
+          {
+            document: {
+              location: 'LOCATION-1',
+              text: 'Hello World',
+              title: 'Sed ut perspiciatis',
+              myField: ['that', 'not'],
+            },
+            rank: expect.any(Number),
+            type: 'my-type',
+          },
         ]);
       },
     );

plugins/search-backend-module-pg/src/database/DatabaseDocumentStore.ts

@@ -171,9 +171,13 @@ export class DatabaseDocumentStore implements DatabaseStore {
       Object.keys(fields).forEach(key => {
         const value = fields[key];
         const valueArray = Array.isArray(value) ? value : [value];
-        const valueCompare = valueArray
+        const fieldValueCompare = valueArray
           .map(v => ({ [key]: v }))
           .map(v => JSON.stringify(v));
+        const arrayValueCompare = valueArray
+          .map(v => ({ [key]: [v] }))
+          .map(v => JSON.stringify(v));
+        const valueCompare = [...fieldValueCompare, ...arrayValueCompare];
         query.whereRaw(
           `(${valueCompare.map(() => 'document @> ?').join(' OR ')})`,
           valueCompare,