dynamodb-toolbox
Version:
Lightweight and type-safe query builder for DynamoDB and TypeScript.
14 lines (13 loc) • 550 B
JavaScript
import { pathTokens } from './utils.js';
export const expressExistsCondition = (condition, prefix = '', state) => {
let ConditionExpression = '';
const { attr, exists } = condition;
ConditionExpression += exists ? 'attribute_exists(' : 'attribute_not_exists(';
ConditionExpression += pathTokens(attr, prefix, state);
ConditionExpression += ')';
return {
ConditionExpression,
ExpressionAttributeNames: state.ExpressionAttributeNames,
ExpressionAttributeValues: state.ExpressionAttributeValues
};
};