fix(Postgres Node): Allow passing in arrays to JSON columns for insert (#12452)

packages/nodes-base/nodes/Postgres/test/v2/operations.test.ts

@@ -6,6 +6,7 @@ import type {
 	INode,
 	INodeParameters,
 } from 'n8n-workflow';
+import pgPromise from 'pg-promise';
 
 import * as deleteTable from '../../v2/actions/database/deleteTable.operation';
 import * as executeQuery from '../../v2/actions/database/executeQuery.operation';
@@ -506,6 +507,7 @@ describe('Test PostgresV2, insert operation', () => {
 			items,
 			nodeOptions,
 			createMockDb(columnsInfo),
+			pgPromise(),
 		);
 
 		expect(runQueries).toHaveBeenCalledWith(
@@ -579,6 +581,7 @@ describe('Test PostgresV2, insert operation', () => {
 			inputItems,
 			nodeOptions,
 			createMockDb(columnsInfo),
+			pgPromise(),
 		);
 
 		expect(runQueries).toHaveBeenCalledWith(
@@ -600,6 +603,96 @@ describe('Test PostgresV2, insert operation', () => {
 			nodeOptions,
 		);
 	});
+
+	it('dataMode: define, should accept an array with values if column is of type json', async () => {
+		const convertValuesToJsonWithPgpSpy = jest.spyOn(utils, 'convertValuesToJsonWithPgp');
+		const hasJsonDataTypeInSchemaSpy = jest.spyOn(utils, 'hasJsonDataTypeInSchema');
+
+		const values = [
+			{ value: { id: 1, json: [], foo: 'data 1' }, expected: { id: 1, json: '[]', foo: 'data 1' } },
+			{
+				value: {
+					id: 2,
+					json: [0, 1],
+					foo: 'data 2',
+				},
+				expected: {
+					id: 2,
+					json: '[0,1]',
+					foo: 'data 2',
+				},
+			},
+			{
+				value: {
+					id: 2,
+					json: [0],
+					foo: 'data 2',
+				},
+				expected: {
+					id: 2,
+					json: '[0]',
+					foo: 'data 2',
+				},
+			},
+		];
+
+		values.forEach(async (value) => {
+			const valuePassedIn = value.value;
+			const nodeParameters: IDataObject = {
+				schema: {
+					__rl: true,
+					mode: 'list',
+					value: 'public',
+				},
+				table: {
+					__rl: true,
+					value: 'my_table',
+					mode: 'list',
+				},
+				columns: {
+					mappingMode: 'defineBelow',
+					value: valuePassedIn,
+				},
+				options: { nodeVersion: 2.5 },
+			};
+			const columnsInfo: ColumnInfo[] = [
+				{ column_name: 'id', data_type: 'integer', is_nullable: 'NO', udt_name: '' },
+				{ column_name: 'json', data_type: 'json', is_nullable: 'NO', udt_name: '' },
+				{ column_name: 'foo', data_type: 'text', is_nullable: 'NO', udt_name: '' },
+			];
+
+			const inputItems = [
+				{
+					json: valuePassedIn,
+				},
+			];
+
+			const nodeOptions = nodeParameters.options as IDataObject;
+			const pg = pgPromise();
+
+			await insert.execute.call(
+				createMockExecuteFunction(nodeParameters),
+				runQueries,
+				inputItems,
+				nodeOptions,
+				createMockDb(columnsInfo),
+				pg,
+			);
+
+			expect(runQueries).toHaveBeenCalledWith(
+				[
+					{
+						query: 'INSERT INTO $1:name.$2:name($3:name) VALUES($3:csv) RETURNING *',
+						values: ['public', 'my_table', value.expected],
+					},
+				],
+				inputItems,
+				nodeOptions,
+			);
+			expect(convertValuesToJsonWithPgpSpy).toHaveBeenCalledWith(pg, columnsInfo, valuePassedIn);
+			expect(hasJsonDataTypeInSchemaSpy).toHaveBeenCalledWith(columnsInfo);
+		});
+	});
 });
 
 describe('Test PostgresV2, select operation', () => {