fix(Postgres Node): RMC do not mark collumn as required if identity_generation is BY DEFAULT (#13752)

Co-authored-by: Dana <152518854+dana-gill@users.noreply.github.com>

Author: michael-radency

packages/nodes-base/nodes/Postgres/Postgres.node.ts

@@ -11,7 +11,7 @@ export class Postgres extends VersionedNodeType {
 			name: 'postgres',
 			icon: 'file:postgres.svg',
 			group: ['input'],
-			defaultVersion: 2.5,
+			defaultVersion: 2.6,
 			description: 'Get, add and update data in Postgres',
 			parameterPane: 'wide',
 		};
@@ -24,6 +24,7 @@ export class Postgres extends VersionedNodeType {
 			2.3: new PostgresV2(baseDescription),
 			2.4: new PostgresV2(baseDescription),
 			2.5: new PostgresV2(baseDescription),
+			2.6: new PostgresV2(baseDescription),
 		};
 
 		super(nodeVersions, baseDescription);

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

@@ -713,6 +713,51 @@ describe('Test PostgresV2, insert operation', () => {
 			expect(hasJsonDataTypeInSchemaSpy).toHaveBeenCalledWith(columnsInfo);
 		});
 	});
+
+	it('should insert default values if no values are provided', async () => {
+		const nodeParameters: IDataObject = {
+			schema: {
+				__rl: true,
+				mode: 'list',
+				value: 'public',
+			},
+			table: {
+				__rl: true,
+				value: 'my_table',
+				mode: 'list',
+			},
+			dataMode: 'defineBelow',
+			valuesToSend: {
+				values: [],
+			},
+			options: { nodeVersion: 2.6 },
+		};
+		const columnsInfo: ColumnInfo[] = [
+			{ column_name: 'id', data_type: 'integer', is_nullable: 'NO', udt_name: '' },
+		];
+
+		const nodeOptions = nodeParameters.options as IDataObject;
+
+		await insert.execute.call(
+			createMockExecuteFunction(nodeParameters),
+			runQueries,
+			items,
+			nodeOptions,
+			createMockDb(columnsInfo),
+			pgPromise(),
+		);
+
+		expect(runQueries).toHaveBeenCalledWith(
+			[
+				{
+					query: 'INSERT INTO $1:name.$2:name DEFAULT VALUES RETURNING *',
+					values: ['public', 'my_table', {}],
+				},
+			],
+			items,
+			nodeOptions,
+		);
+	});
 });
 
 describe('Test PostgresV2, select operation', () => {

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

@@ -0,0 +1,88 @@
+import type { MockProxy } from 'jest-mock-extended';
+import { mock } from 'jest-mock-extended';
+import type { ILoadOptionsFunctions } from 'n8n-workflow';
+
+import { getMappingColumns } from '../../v2/methods/resourceMapping';
+
+jest.mock('../../transport', () => {
+	const originalModule = jest.requireActual('../../transport');
+	return {
+		...originalModule,
+		configurePostgres: jest.fn(async () => ({ db: {} })),
+	};
+});
+
+jest.mock('../../v2/helpers/utils', () => {
+	const originalModule = jest.requireActual('../../v2/helpers/utils');
+	return {
+		...originalModule,
+		getEnums: jest.fn(() => []),
+		getEnumValues: jest.fn(),
+		getTableSchema: jest.fn(() => [
+			{
+				column_name: 'id',
+				data_type: 'bigint',
+				is_nullable: 'NO',
+				udt_name: 'int8',
+				column_default: null,
+				identity_generation: 'BY DEFAULT',
+				is_generated: 'NEVER',
+			},
+			{
+				column_name: 'name',
+				data_type: 'text',
+				is_nullable: 'YES',
+				udt_name: 'text',
+				column_default: null,
+				identity_generation: null,
+				is_generated: 'NEVER',
+			},
+		]),
+	};
+});
+
+describe('Postgres, resourceMapping', () => {
+	let loadOptionsFunctions: MockProxy<ILoadOptionsFunctions>;
+
+	beforeEach(() => {
+		loadOptionsFunctions = mock<ILoadOptionsFunctions>();
+	});
+
+	afterEach(() => {
+		jest.resetAllMocks();
+	});
+
+	it('should mark id as not required if identity_generation is "BY_DEFAULT"', async () => {
+		loadOptionsFunctions.getCredentials.mockResolvedValue({});
+		loadOptionsFunctions.getNodeParameter.mockReturnValueOnce('public');
+		loadOptionsFunctions.getNodeParameter.mockReturnValueOnce('test_table');
+		loadOptionsFunctions.getNodeParameter.mockReturnValueOnce('insert');
+
+		const fields = await getMappingColumns.call(loadOptionsFunctions);
+
+		expect(fields).toEqual({
+			fields: [
+				{
+					canBeUsedToMatch: true,
+					defaultMatch: true,
+					display: true,
+					displayName: 'id',
+					id: 'id',
+					options: undefined,
+					required: false,
+					type: 'number',
+				},
+				{
+					canBeUsedToMatch: true,
+					defaultMatch: false,
+					display: true,
+					displayName: 'name',
+					id: 'name',
+					options: undefined,
+					required: false,
+					type: 'string',
+				},
+			],
+		});
+	});
+});

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

@@ -146,15 +146,15 @@ describe('Test PostgresV2, parsePostgresError', () => {
 
 	it('should update message with syntax error', () => {
 		// eslint-disable-next-line n8n-local-rules/no-unneeded-backticks
-		const errorMessage = String.raw`syntax error at or near "seelect"`;
+		const errorMessage = String.raw`syntax error at or near "select"`;
 		const error = new Error();
 		error.message = errorMessage;
 
 		const parsedError = parsePostgresError(node, error, [
-			{ query: 'seelect * from my_table', values: [] },
+			{ query: 'select * from my_table', values: [] },
 		]);
 		expect(parsedError).toBeDefined();
-		expect(parsedError.message).toEqual('Syntax error at line 1 near "seelect"');
+		expect(parsedError.message).toEqual('Syntax error at line 1 near "select"');
 		expect(parsedError instanceof NodeOperationError).toEqual(true);
 	});
 });
@@ -201,7 +201,7 @@ describe('Test PostgresV2, addWhereClauses', () => {
 		expect(updatedValues).toEqual(['public', 'my_table', 'id', '1', 'foo', 'select 2']);
 	});
 
-	it('should ignore incorect combine conition ad use AND', () => {
+	it('should ignore incorrect combine condition ad use AND', () => {
 		const query = 'SELECT * FROM $1:name.$2:name';
 		const values = ['public', 'my_table'];
 		const whereClauses = [
@@ -246,7 +246,7 @@ describe('Test PostgresV2, addSortRules', () => {
 		expect(updatedQuery).toEqual('SELECT * FROM $1:name.$2:name ORDER BY $3:name DESC');
 		expect(updatedValues).toEqual(['public', 'my_table', 'id']);
 	});
-	it('should ignore incorect direction', () => {
+	it('should ignore incorrect direction', () => {
 		const query = 'SELECT * FROM $1:name.$2:name';
 		const values = ['public', 'my_table'];
 		const sortRules = [{ column: 'id', direction: 'SELECT * FROM my_table' }];
@@ -340,7 +340,7 @@ describe('Test PostgresV2, replaceEmptyStringsByNulls', () => {
 });
 
 describe('Test PostgresV2, prepareItem', () => {
-	it('should convert fixedColections values to object', () => {
+	it('should convert fixedCollection values to object', () => {
 		const values = [
 			{
 				column: 'id',

packages/nodes-base/nodes/Postgres/v2/actions/database/insert.operation.ts

@@ -241,6 +241,10 @@ export async function execute(
 
 		const outputColumns = this.getNodeParameter('options.outputColumns', i, ['*']) as string[];
 
+		if (nodeVersion >= 2.6 && Object.keys(item).length === 0) {
+			query = 'INSERT INTO $1:name.$2:name DEFAULT VALUES';
+		}
+
 		[query, values] = addReturning(query, outputColumns, values);
 
 		queries.push({ query, values });

packages/nodes-base/nodes/Postgres/v2/actions/versionDescription.ts

@@ -8,7 +8,7 @@ export const versionDescription: INodeTypeDescription = {
 	name: 'postgres',
 	icon: 'file:postgres.svg',
 	group: ['input'],
-	version: [2, 2.1, 2.2, 2.3, 2.4, 2.5],
+	version: [2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6],
 	subtitle: '={{ $parameter["operation"] }}',
 	description: 'Get, add and update data in Postgres',
 	defaults: {

packages/nodes-base/nodes/Postgres/v2/methods/resourceMapping.ts

@@ -74,7 +74,9 @@ export async function getMappingColumns(
 			const options =
 				type === 'options' ? getEnumValues(enumInfo, col.udt_name as string) : undefined;
 			const hasDefault = Boolean(col.column_default);
-			const isGenerated = col.is_generated === 'ALWAYS' || col.identity_generation === 'ALWAYS';
+			const isGenerated =
+				col.is_generated === 'ALWAYS' ||
+				['ALWAYS', 'BY DEFAULT'].includes(col.identity_generation ?? '');
 			const nullable = col.is_nullable === 'YES';
 			return {
 				id: col.column_name,