Dynamodb-lib NPM

Dynamodb-lib

This library was created to simplify work with AWS Dynamodb using generalized functions.

Installation

Use the package manager npm to install dynamodb-lib.

npm install dynamodb-lib

or

npm i dynamodb-lib

Usage

Set AWS configurations in environment variables:

export AWS_ACCESS_KEY_ID="Your AWS Access Key ID"
export AWS_SECRET_ACCESS_KEY="Your AWS Secret Access Key"
export AWS_REGION="us-east-1"

Here's a simple examples:

import {
  getItemByGSI,
  getAllItemsByGSI,
  updateInDB,
  writeDataIntoDB,
  removeAttributes,
  deleteItems,
  deleteItem
} from dynamodb-lib;

`getItemByGSI` => promise for returning Items from Dynamodb table using one query

`getItemByGSI`can take following parameters:

TableName - Name of you Dynamodb table: required type String

IndexName - Name of you Index from Dynamodb table: optional type String

attribute - Key for query: required type String

value - Value for Key: required

sortKey - optional type String

sortValue - Value for SortKey: optional

filter - Filter for using in FilterExpression: optional type String

filterValue - Value for Filter: optional

operator - Operator for Filters if you have more then 1 filter. Required if you have filter1 and filterValue1: optional type String

filter1 - Second Filter for using in FilterExpression: optional type String

filterValue1 - Value for Filter1: optional

LastEvaluatedKey - Use LastEvaluatedKey for get next items. You can get LastEvaluatedKey from first request if You have more items in Table for one query : optional type Object

ScanIndexForward - Use ScanIndexForward for ordering items. For sure items be ordered if you have sort Key. ScanIndexForward: false for Descending. By default its Ascending: optional type Boolean

Limit - Use Limit for get Limited Items: optional type Number

Here's a simple example:

await getItemByGSI({
      TableName : 'Example',
      IndexName: 'favorite-createdAt-index',
      attribute: 'favorite',
      value: 'true',
      ScanIndexForward: false,
      Limit: 50
})

`getAllItemsByGSI` => promise for returning all Items from Dynamodb table using recursive queries

`getAllItemsByGSI`can take same parameters as `getItemByGSI`.

`writeDataIntoDB` => promise for write record in Dynamodb table

`writeDataIntoDB`can take following parameters:

TableName - Name of you Dynamodb table: required type String

Item - Object for insert to Dynamodb table: required type Object

Here's a simple example:

await writeDataIntoDB({
      TableName : 'Example',
      Item: {
         id: '9474d4f5-546f-447b-bdd8-a9cc27315e3d ',
         name: 'John',
         gender: 'male'
      }

})

`updateInDB` => promise for update record in Dynamodb table

`updateInDB`can take following parameters:

TableName - Name of you Dynamodb table: required type String

Key - Object with Primary Key and Sort key if its be added in tables default index : required type Object updatedData - Object with data for update(its can update nested objects data to). Primary key and sort key cant be updated: required type Object

Here's a simple example:

await updateInDB({
      TableName : 'Example',
      Key: {id: 1, date: '12/12/2019'}
      updatedData: {
         name: 'John',
         gender: 'male',
         skills: {
          programming: 'Good'
         }
      }

})