@env0/dynamo-easy
Version:
DynamoDB client for NodeJS and browser with a fluent api to build requests. We take care of the type mapping between JS and DynamoDB, customizable trough typescript decorators.
49 lines • 2.26 kB
JavaScript
import * as tslib_1 from "tslib";
import { uniqueAttributeValueName } from '../functions/unique-attribute-value-name.function';
/**
* @hidden
*/
export function mergeConditions(operator, conditionDefinitionFns) {
return function (expressionAttributeValues, metadata) {
var mergedCondition = {
statement: '',
attributeNames: {},
attributeValues: {},
};
var statements = [];
conditionDefinitionFns.forEach(function (conditionDefinitionFn) {
// we can reuse the same for multiple conditions
var condition = conditionDefinitionFn(expressionAttributeValues, metadata);
mergedCondition.attributeNames = tslib_1.__assign({}, mergedCondition.attributeNames, condition.attributeNames);
/*
* we need to make sure the value variable name is unique, this wont' work so the second :name must be renamed
* {
* ":name" : { S: "the name" },
* ":name" : { S: "other name" }
* }
* |
* |
* ▽
* {
* ":name" : { S: "the name" },
* ":name_2" : { S: "other name" }
* }
*
*/
var attributeValues = {};
Object.keys(condition.attributeValues).forEach(function (key) {
var unique = uniqueAttributeValueName(key.replace(':', ''), Object.keys(mergedCondition.attributeValues));
if (key !== unique) {
// rename of the attributeName is required in condition
condition.statement = condition.statement.replace(key, unique);
}
attributeValues[unique] = condition.attributeValues[key];
});
mergedCondition.attributeValues = tslib_1.__assign({}, mergedCondition.attributeValues, attributeValues);
statements.push(condition.statement);
});
mergedCondition.statement = statements.length === 1 ? statements[0] : "(" + statements.join(' ' + operator + ' ') + ")";
return mergedCondition;
};
}
//# sourceMappingURL=merge-conditions.function.js.map