dynamodb-toolbox/dist/esm/entity/actions/update/expressUpdate/updates/prepend.js

Lightweight and type-safe query builder for DynamoDB and TypeScript.

import { $PREPEND } from '../../symbols/index.js';
import { pathTokens, refOrValueTokens } from './utils.js';
export const expressPrependUpdate = (value, path, state) => {
    let setExpression = pathTokens(path, 's', state);
    setExpression += ' = list_append(';
    /**
     * @debt type "Fix this cast"
     */
    setExpression += refOrValueTokens(value[$PREPEND], 's', state);
    setExpression += ', if_not_exists(';
    setExpression += pathTokens(path, 's', state);
    setExpression += ', ';
    setExpression += refOrValueTokens([], 's', state);
    setExpression += '))';
    state.setExpressions.push(setExpression);
    return state;
};