GSI Query Example

dynamodb.js

function findBookByGenreAndYear({genre, startYear, endYear}) {
  var params = {
      ExpressionAttributeValues: {
          ":genre": {"S": genre},
          ":startYear": {"N": startYear},
          ":endYear": {"N": endYear},
        },
        ExpressionAttributesNames:{
          "#genre": "Genre",
          "#y": "Year",
        },
        KeyConditionExpression: "#genre = :genre AND #y BETWEEN :startYear AND :endYear", 
        TableName: "Library",
        IndexName: "GSI_1"
  }
}