dynamodb-expr

DynamoDB expression utility.

Installation

npm i dynamodb-expr -S

API

buildProjectionExpression(attributes, ExpressionAttributeNames)

Build a projection expression.

• attributes
  • An array of names of attributes to be projected.
• ExpressionAttributeNames
  • An object that adds mappings of attributes that are replaced with placeholders during expression construction.

The return value is a string of the projection expression that reserved words in it are replaced with placeholders.

Example:

const { buildProjectionExpression } = require('dynamodb-expr');
 
const ExpressionAttributeNames = {};
 
const ProjectionExpression = buildProjectionExpression(['index', `foo'], ExpressionAttributeNames);
 
// Result:
//   ProjectionExpression: '#index,foo'
//   ExpressionAttributeNames: { '#index': 'index' }

isReserved(word)

Return a boolean value that indicates whether the word is reserved.

Constant

RESERVED_KEYWORDS

An array of reserved keywords.

License

MIT