AWS DynamoDB Error improvements, Optional GetAll Scan FilterExpression - N8N-3701

packages/nodes-base/nodes/Aws/DynamoDB/AwsDynamoDB.node.ts

@@ -307,11 +307,13 @@ export class AwsDynamoDB implements INodeType {
 
 						const body: IRequestBody = {
 							TableName: this.getNodeParameter('tableName', i) as string,
-							ExpressionAttributeValues: adjustExpressionAttributeValues(eavUi),
 						};
 
 						if (scan === true) {
-							body['FilterExpression'] = this.getNodeParameter('filterExpression', i) as string;
+							const filterExpression = this.getNodeParameter('filterExpression', i) as string;
+							if (filterExpression) {
+								body['FilterExpression'] = filterExpression;
+							}
 						} else {
 							body['KeyConditionExpression'] = this.getNodeParameter('keyConditionExpression', i) as string;
 						}
@@ -332,6 +334,12 @@ export class AwsDynamoDB implements INodeType {
 							body.ExpressionAttributeNames = expressionAttributeName;
 						}
 
+						const expressionAttributeValues = adjustExpressionAttributeValues(eavUi);
+
+						if (Object.keys(expressionAttributeValues).length) {
+							body.ExpressionAttributeValues = expressionAttributeValues;
+						}
+
 						if (indexName) {
 							body.IndexName = indexName;
 						}

packages/nodes-base/nodes/Aws/DynamoDB/GenericFunctions.ts

@@ -59,7 +59,7 @@ export async function awsApiRequest(this: IHookFunctions | IExecuteFunctions | I
 	try {
 		return JSON.parse(await this.helpers.request!(options));
 	} catch (error) {
-		const errorMessage = (error.response && error.response.body.message) || (error.response && error.response.body.Message) || error.message;
+		const errorMessage = (error.response && error.response.body && error.response.body.message) || (error.response && error.response.body && error.response.body.Message) || error.message;
 		if (error.statusCode === 403) {
 			if (errorMessage === 'The security token included in the request is invalid.') {
 				throw new Error('The AWS credentials are not valid!');

packages/nodes-base/nodes/Aws/DynamoDB/ItemDescription.ts

@@ -350,7 +350,7 @@ export const itemFields: INodeProperties[] = [
 				],
 			},
 		],
-		description: 'Item\'s primary key. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key',
+		description: 'Item\'s primary key. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.',
 	},
 	{
 		displayName: 'Simplify',
@@ -593,7 +593,7 @@ export const itemFields: INodeProperties[] = [
 				],
 			},
 		],
-		description: 'Item\'s primary key. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key',
+		description: 'Item\'s primary key. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.',
 	},
 	{
 		displayName: 'Additional Fields',
@@ -695,7 +695,6 @@ export const itemFields: INodeProperties[] = [
 		displayName: 'Filter Expression',
 		name: 'filterExpression',
 		type: 'string',
-		required: true,
 		displayOptions: {
 			show: {
 				scan: [
@@ -704,7 +703,7 @@ export const itemFields: INodeProperties[] = [
 			},
 		},
 		default: '',
-		description: 'A filter expression determines which items within the Scan results should be returned to you. All of the other results are discarded.',
+		description: 'A filter expression determines which items within the Scan results should be returned to you. All of the other results are discarded. Empty value will return all Scan results.',
 	},
 	{
 		displayName: 'Key Condition Expression',
@@ -912,7 +911,7 @@ export const itemFields: INodeProperties[] = [
 				name: 'projectionExpression',
 				type: 'string',
 				default: '',
-				description: 'Text that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas',
+				description: 'Text that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.',
 			},
 			{
 				displayName: 'Filter Expression',