From 272bba188955e90e365de5c67bb7bee1edb51240 Mon Sep 17 00:00:00 2001
From: Charlie Kolb <charlie@n8n.io>
Date: Tue, 28 Oct 2025 11:33:49 +0100
Subject: [PATCH] add object test cases

---
 .../data-table.service.integration.test.ts    | 40 +++++++++++++++++++
 .../modules/data-table/data-table.service.ts  |  3 +-
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts b/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts
index 28f5e42b97a..9ef9e4804f0 100644
--- a/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts
+++ b/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts
@@ -3568,6 +3568,9 @@ describe('dataTable', () => {
 			[{ key: 'value' }, 0, 'eq', true],
 			[true, 1, 'eq', true],
 			[false, 0, 'eq', true],
+			[{ a: 3 }, { a: 3 }, 'eq', true],
+			[{ a: 3 }, { a: 4 }, 'neq', true],
+			[{}, {}, 'eq', true],
 		])(
 			'inserts json with input %p, filter %p, operator %p, expectPresent %p',
 			async (input, filter, operator, expectPresent) => {
@@ -3655,5 +3658,42 @@ describe('dataTable', () => {
 				]);
 			}
 		});
+		it('handles object comparison', async () => {
+			// ARRANGE
+			const { id: dataStoreId } = await dataTableService.createDataTable(project1.id, {
+				name: 'dataStore',
+				columns: [{ name: 'c1', type: 'json' }],
+			});
+
+			// ACT
+			const rows = [{ c1: { a: { b: 4 } } }];
+			await dataTableService.insertRows(dataStoreId, project1.id, rows, 'id');
+
+			// ASSERT
+
+			{
+				const { data } = await dataTableService.getManyRowsAndCount(dataStoreId, project1.id, {
+					filter: {
+						type: 'and',
+						filters: [
+							{
+								columnName: 'c1',
+								condition: 'eq',
+								value: { a: { b: 4 } },
+								path: '',
+							},
+						],
+					},
+				});
+				expect(data).toEqual([
+					{
+						c1: { a: { b: 4 } },
+						id: 1,
+						createdAt: expect.any(Date),
+						updatedAt: expect.any(Date),
+					},
+				]);
+			}
+		});
 	});
 });
diff --git a/packages/cli/src/modules/data-table/data-table.service.ts b/packages/cli/src/modules/data-table/data-table.service.ts
index 3180c822061..da24cf88654 100644
--- a/packages/cli/src/modules/data-table/data-table.service.ts
+++ b/packages/cli/src/modules/data-table/data-table.service.ts
@@ -490,7 +490,8 @@ export class DataTableService {
 		const fieldType = columnTypeToFieldType[columnType];
 		if (!fieldType) return cell;
 
-		if (!validateJsonInput && columnType === 'json') return cell;
+		if (!validateJsonInput && columnType === 'json')
+			return typeof cell === 'object' ? JSON.stringify(cell) : cell;
 
 		const validationResult = validateFieldType(key, cell, fieldType, {
 			strict: false, // Allow type coercion (e.g., string numbers to numbers)