我正在尝试使用 DynamoDB 表来存储这些数据:
DartsPlayerInsultTable
CustomerId String
PlayerId String
PlayerInsult String
使用此处描述的方法(概念,而不是代码):
https://java.awsblog.com/post/Tx3GYZEVGO924K4/The-DynamoDBMapper-Local-Secondary-Indexes-and-You
这里:
http://mobile.awsblog.com/post/TxTCW7KW8BGZAF/Amazon-DynamoDB-on-Mobile-Part-4-Local-Secondary-Indexes
和这里:
http://labs.journwe.com/2013/12/15/dynamodb-secondary-indexes/comment-page-1/#comment-116
我希望每个客户玩家有多个侮辱记录。CustomerId 是我的哈希键 PlayerId 是我的范围键,我试图在键中使用 PlayerInsult,以便第二个 PlayerInsult 值插入第二条记录,而不是替换现有的记录。
为此尝试了全局索引和二级索引,但如果我尝试添加新的侮辱行,它仍然会用相同的客户-玩家密钥替换侮辱,而不是添加新的。
DynanoDB 对此的最佳使用方法有什么建议吗?我是否需要为范围键创建混合列?试图保持这个简单...
class func createDartsPlayerInsultTable() -> BFTask {
let dynamoDB = AWSDynamoDB.defaultDynamoDB()
let hashKeyAttributeDefinition = AWSDynamoDBAttributeDefinition()
hashKeyAttributeDefinition.attributeName = "CustomerId"
hashKeyAttributeDefinition.attributeType = AWSDynamoDBScalarAttributeType.S
let hashKeySchemaElement = AWSDynamoDBKeySchemaElement()
hashKeySchemaElement.attributeName = "CustomerId"
hashKeySchemaElement.keyType = AWSDynamoDBKeyType.Hash
let rangeKeyAttributeDefinition = AWSDynamoDBAttributeDefinition()
rangeKeyAttributeDefinition.attributeName = "PlayerId"
rangeKeyAttributeDefinition.attributeType = AWSDynamoDBScalarAttributeType.S
let rangeKeySchemaElement = AWSDynamoDBKeySchemaElement()
rangeKeySchemaElement.attributeName = "PlayerId"
rangeKeySchemaElement.keyType = AWSDynamoDBKeyType.Range
/*
let indexRangeKeyAttributeDefinition = AWSDynamoDBAttributeDefinition()
indexRangeKeyAttributeDefinition.attributeName = "PlayerInsult"
indexRangeKeyAttributeDefinition.attributeType = AWSDynamoDBScalarAttributeType.S
let rangeKeySchemaElement = AWSDynamoDBKeySchemaElement()
rangeKeySchemaElement.attributeName = "PlayerId"
rangeKeySchemaElement.keyType = AWSDynamoDBKeyType.Range
let indexRangeKeyElement = AWSDynamoDBKeySchemaElement()
indexRangeKeyElement.attributeName = "PlayerInsult"
indexRangeKeyElement.keyType = AWSDynamoDBIndexRangeKeyType.
*/
//Add non-key attributes
let playerInsultAttrDef = AWSDynamoDBAttributeDefinition()
playerInsultAttrDef.attributeName = "PlayerInsult"
playerInsultAttrDef.attributeType = AWSDynamoDBScalarAttributeType.S
let provisionedThroughput = AWSDynamoDBProvisionedThroughput()
provisionedThroughput.readCapacityUnits = 5
provisionedThroughput.writeCapacityUnits = 5
// CREATE GLOBAL SECONDARY INDEX
/*
let gsi = AWSDynamoDBGlobalSecondaryIndex()
let gsiArray = NSMutableArray()
let gsiHashKeySchema = AWSDynamoDBKeySchemaElement()
gsiHashKeySchema.attributeName = "PlayerId"
gsiHashKeySchema.keyType = AWSDynamoDBKeyType.Hash
let gsiRangeKeySchema = AWSDynamoDBKeySchemaElement()
gsiRangeKeySchema.attributeName = "PlayerInsult"
gsiRangeKeySchema.keyType = AWSDynamoDBKeyType.Range
let gsiProjection = AWSDynamoDBProjection()
gsiProjection.projectionType = AWSDynamoDBProjectionType.All;
gsi.keySchema = [gsiHashKeySchema,gsiRangeKeySchema];
gsi.indexName = "PlayerInsult";
gsi.projection = gsiProjection;
gsi.provisionedThroughput = provisionedThroughput;
gsiArray .addObject(gsi)
*/
// CREATE LOCAL SECONDARY INDEX
let lsi = AWSDynamoDBLocalSecondaryIndex()
let lsiArray = NSMutableArray()
let lsiHashKeySchema = AWSDynamoDBKeySchemaElement()
lsiHashKeySchema.attributeName = "CustomerId"
lsiHashKeySchema.keyType = AWSDynamoDBKeyType.Hash
let lsiRangeKeySchema = AWSDynamoDBKeySchemaElement()
lsiRangeKeySchema.attributeName = "PlayerInsult"
lsiRangeKeySchema.keyType = AWSDynamoDBKeyType.Range
let lsiProjection = AWSDynamoDBProjection()
lsiProjection.projectionType = AWSDynamoDBProjectionType.All;
lsi.keySchema = [lsiHashKeySchema,lsiRangeKeySchema];
lsi.indexName = "PlayerInsult";
lsi.projection = lsiProjection;
//lsi.provisionedThroughput = provisionedThroughput;
lsiArray .addObject(lsi)
//Create TableInput
let createTableInput = AWSDynamoDBCreateTableInput()
createTableInput.tableName = DartsPlayerInsultTableName;
createTableInput.attributeDefinitions = [hashKeyAttributeDefinition, rangeKeyAttributeDefinition, playerInsultAttrDef]
//createTableInput.attributeDefinitions = [hashKeyAttributeDefinition, rangeKeyAttributeDefinition]
createTableInput.keySchema = [hashKeySchemaElement, rangeKeySchemaElement]
createTableInput.provisionedThroughput = provisionedThroughput
//createTableInput.globalSecondaryIndexes = gsiArray as [AnyObject]
createTableInput.localSecondaryIndexes = lsiArray as [AnyObject]
return dynamoDB.createTable(createTableInput).continueWithSuccessBlock({ (var task:BFTask!) -> AnyObject! in
if ((task.result) != nil) {
// Wait for up to 4 minutes until the table becomes ACTIVE.
let describeTableInput = AWSDynamoDBDescribeTableInput()
describeTableInput.tableName = DartsPlayerInsultTableName;
task = dynamoDB.describeTable(describeTableInput)
for var i = 0; i < 16; i++ {
task = task.continueWithSuccessBlock({ (task:BFTask!) -> AnyObject! in
let describeTableOutput:AWSDynamoDBDescribeTableOutput = task.result as! AWSDynamoDBDescribeTableOutput
let tableStatus = describeTableOutput.table.tableStatus
if tableStatus == AWSDynamoDBTableStatus.Active {
return task
}
sleep(15)
return dynamoDB .describeTable(describeTableInput)
})
}
}
return task
})
}