I am trying to update an item in my dynamoDB noSQL database. Having some troubles implementing this in swift as there is no swift documentation yet.
I was able to create an item in the database successfully, updating an item seems to be a whole other monster.
Swift Code:
var updatedValue: AWSDynamoDBAttributeValue = AWSDynamoDBAttributeValue()
updatedValue.s = self.UserID
let dynamo: AWSDynamoDB = AWSDynamoDB()
let AddToHistory = Users()
AddToHistory?._campany = self.CompanyTextBox.text!
AddToHistory?._personalSite = self.PersonalTitleTextBox.text!
AddToHistory?._facebook = self.FacebookTextBox.text!
AddToHistory?._linkedIn = self.LinkedInTextBox.text!
AddToHistory?._title = self.TitleTextBox.text!
AddToHistory?._bio = self.BioTextBox.text!
let updateInput: AWSDynamoDBUpdateItemInput = AWSDynamoDBUpdateItemInput()
updateInput.tableName = "myTableName"
updateInput.key = ["_userId": updatedValue]
let updatedCompany = AWSDynamoDBAttributeValue()
updatedCompany?.s = AddToHistory?._campany
let updatedFacebook = AWSDynamoDBAttributeValue()
updatedFacebook?.s = AddToHistory?._facebook
let updatedLinkedIn = AWSDynamoDBAttributeValue()
updatedLinkedIn?.s = AddToHistory?._linkedIn
let updatedPersonalSite = AWSDynamoDBAttributeValue()
updatedPersonalSite?.s = AddToHistory?._personalSite
let updatedTitle = AWSDynamoDBAttributeValue()
updatedTitle?.s = AddToHistory?._title
let updatedBio = AWSDynamoDBAttributeValue()
updatedBio?.s = AddToHistory?._bio
updateInput.expressionAttributeValues = [
"_campany" : updatedCompany!,
"_facebook" : updatedFacebook!,
"_linkedIn" : updatedLinkedIn!,
"_personalSite" : updatedPersonalSite!,
"_title" : updatedTitle!,
"_bio" : updatedBio!,
]
updateInput.returnValues = AWSDynamoDBReturnValue.updatedNew
dynamo.updateItem(updateInput).continueOnSuccessWith(block: { (task:AWSTask!) -> AnyObject! in
if (task.error == nil) {
}
return nil
}
)
Not getting any warnings or errors in the editor, however when I run the app and press the button which runs this code, I get this exception thrown:
Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: '- init is not a valid
initializer. Use + defaultDynamoDB or + DynamoDBForKey: instead.'
Not sure what I am missing here, it must be something to do with the way I am initializing the dynamoDB object. Tried accessing a default method for init, but there is no such method. :(
Any help would be greatly appreciated, thanks in advance!
Thanks to Jake.lange's comment, I realized I could have used the object mapper that i used to create items to update them as well. Heres the code incase others run into this problem :)
//db connection mapper
let objectMapper = AWSDynamoDBObjectMapper.default()
//new instancer of User class
let itemToUpdate:CheckaraUsers = CheckaraUsers()
//populate
itemToUpdate._userId = UserID
itemToUpdate._firstName = FirstName
itemToUpdate._lastName = LastName
itemToUpdate._campany = AddToHistory?._campany
itemToUpdate._facebook = AddToHistory?._facebook
itemToUpdate._linkedIn = AddToHistory?._linkedIn
itemToUpdate._personalSite = AddToHistory?._personalSite
itemToUpdate._title = AddToHistory?._title
itemToUpdate._bio = AddToHistory?._bio
//save to dynamoDB
objectMapper.save(itemToUpdate, completionHandler:{(error: Error?) -> Void in
if let error = error {
print("Amazon DynamoDB Save Error: \(error)")
}
print("Saved Information!!!")
})
Your definition was wrong.
Change this:
let dynamo: AWSDynamoDB = AWSDynamoDB()
to:
let dynamo: AWSDynamoDB = AWSDynamoDB.default()
Related
I am able to save and retrieve data from Core Data, but I don't know how to not duplicate or avoid the same saved data in Core Data. How should I do this? Any help would be really thankful.
Saving data:
let historyData = trackHistoryData()
historyData.HistorygetConsignmentNo = self.getTrackno
print("cnno",historyData.HistorygetConsignmentNo)
historyData.HistorydateStr = jsonArray[0]["date"] as! String
print("date",historyData.HistorydateStr)
historyData.HistoryofficeStr = jsonArray[0]["office"] as! String
print("office",historyData.HistoryofficeStr)
historyData.HistoryprocessStr = jsonArray[0]["process"] as! String
print("process", historyData.HistoryprocessStr)
let history = HistoryTrack(context: persistenceService.context)
history.cnNo = historyData.HistorygetConsignmentNo
history.date = historyData.HistorydateStr
history.office = historyData.HistoryofficeStr
history.process = historyData.HistoryprocessStr
persistenceService.saveContext()
Retrieving Data:
let fetchRequest:NSFetchRequest<HistoryTrack> = HistoryTrack.fetchRequest()
do {
let historytrack = try persistenceService.context.fetch(fetchRequest)
self.trackhistoryData = historytrack
self.trackHistoryTblView.reloadData()
} catch {}
I am integrating PayTM in my app which is in ios (Swift) and I am facing issue which title is "Transaction Failed" and the message is "MissingKeys"
I have used following code
merchant = PGMerchantConfiguration.default()!
merchant.checksumGenerationURL = "http://getlook.in/cgi-bin/checksum_generate.cgi"
merchant.checksumValidationURL = "http://getlook.in/cgi-bin/checksum_validate.cgi"
merchant.clientSSLCertPath = nil
merchant.clientSSLCertPassword = nil
merchant.merchantID = "rriver57770575448885"
merchant.website = "APP_STAGING"
merchant.industryID = "Retail"
merchant.channelID = "WAP"
var orderDict = [String: String]()
orderDict["MID"] = "rriver57770575448885" // Merchant ID
orderDict["CHANNEL_ID"] = "WAP" // Channel Id
orderDict["INDUSTRY_TYPE_ID"] = "Retail" // Industry Type
orderDict["WEBSITE"] = "APP_STAGING"
orderDict["TXN_AMOUNT"] = "10"; // amount to charge // mandatory
orderDict["ORDER_ID"] = "\(Date().timeIntervalSince1970)";//change order id every time on new transaction
orderDict["REQUEST_TYPE"] = "DEFAULT";// remain same
orderDict["CUST_ID"] = "123456789027"; // change acc. to your database user/customers
orderDict["MOBILE_NO"] = "8798987874";// optional
orderDict["EMAIL"] = "test#paytm.com"; //optional
let pgOrder = PGOrder(params: orderDict)
let transaction = PGTransactionViewController.init(transactionFor: pgOrder)
transaction?.serverType = eServerTypeProduction
transaction?.merchant = merchant
transaction?.loggingEnabled = true
transaction?.delegate = self
self.present(transaction!, animated: true, completion: nil)
please help!
In this code you have missed a parameter called chechSumHash. include that too.
orderDict["CHECKSUMHASH"] = CheckSum;
checkSumHash can be generated in the backend by the help of Paytm checksum generation kit. the checksum is a unique string which will change according to the parameter that we have send for checksum generation Api
Query results retrieved
"Adjusted_Lease_Value__c" = "0.0";
"Amount_Financed__c" = "23520.64";
"Assignment_Amount__c" = "19220.21";
"Category__c" = 4;
"Charge_Off_Amount__c" = "0.0";
"Committed_Funds__c" = "19220.21";
"Date_Assigned_Back_to_ACG__c" = "<null>"
How I'm retrieving them:
// Initial Access to Salesforce in order to query data
client.performLogin(accessUsername, password: accessPassword, fail:{ (fail) in
}) { (success) in
self.queryResult = self.client.query(getCasesSQL2)
for o: Any in self.queryResult.records() {
// This line fails
let test = (o as AnyObject).fieldValue("Date_Assigned_Back_to_ACG__c") as! String
// This works no problem
let AmountFinanced = ((o as AnyObject).fieldValue("Amount_Financed__c") as! String
}
When the query result is "null" it crashes the app. What should I do?
If it may nil then do not use forced conversion.
self.queryResult = self.client.query(getCasesSQL2)
for o: Any in self.queryResult.records() {
let test = (o as AnyObject).fieldValue("Date_Assigned_Back_to_ACG__c") as? String
let amountFinanced = ((o as AnyObject).fieldValue("Amount_Financed__c") as? String
}
I’m trying to save a dictionary to my DynamoDB table field using low-level API. I couldn’t figure out how to do it with object mapper. There is no example for this in AWS iOS documentation and I’ve tried to research and implement Java / .NET examples of the same subject unsuccessfully.
I want to update only the dictionary field in the row using updateExpression.
I stumbled to this question while searching for answer, but it didn't help: Best way to make Amazon AWS DynamoDB queries using Swift?
Here’s the function to update dynamoDB-table:
func saveMapToDatabase(hashKey:Int, rangeKey:Double, myDict:[Int:Double]){
let nsDict:NSDictionary = NSDictionary(dictionary: myDict)
var dictAsAwsValue = AWSDynamoDBAttributeValue();dictAsAwsValue.M = nsDict as [NSObject : AnyObject]
let updateInput:AWSDynamoDBUpdateItemInput = AWSDynamoDBUpdateItemInput()
let hashKeyValue:AWSDynamoDBAttributeValue = AWSDynamoDBAttributeValue();hashKeyValue.N = String(hashKey)
let rangeKeyValue:AWSDynamoDBAttributeValue = AWSDynamoDBAttributeValue(); rangeKeyValue.N = String(stringInterpolationSegment: rangeKey)
updateInput.tableName = "my_table_name"
updateInput.key = ["db_hash_key" :hashKeyValue, "db_range_key":rangeKeyValue]
//How I usually do low-level update:
//let valueUpdate:AWSDynamoDBAttributeValueUpdate = AWSDynamoDBAttributeValueUpdate()
//valueUpdate.value = dictAsAwsValue
//valueUpdate.action = AWSDynamoDBAttributeAction.Put
//updateInput.attributeUpdates = ["db_dictionary_field":valueUpdate]
//Using the recommended way: updateExpression
updateInput.expressionAttributeValues = ["dictionary_value":dictAsAwsValue]
updateInput.updateExpression = "SET db_dictionary_field = :dictionary_value"
self.dynamoDB.updateItem(updateInput).continueWithBlock{(task:BFTask!)->AnyObject! in
//do some debug stuff
println(updateInput.aws_properties())
println(task.description)
return nil
}
}
I solved it, the problem was that AWS requires dictionary keys to always be in the form of String, any other type is not allowed.
The working solution snippet:
...
updateInput.tableName = "my_table_name"
updateInput.key = ["db_hash_key" :hashKeyValue, "db_range_key":rangeKeyValue]
let dictionaryInRightFormat:NSDictionary = ["stringKey":dictAsAwsValue]
updateInput.expressionAttributeValues = updateInput.updateExpression = "SET db_dictionary_field = :stringKey"
I can perform a simple Get request on a singular table within AWS dynamoDB however when I expand it to a Batch Request across multiple tables I continue to get a error
validation error detected: Value null at 'requestItems.rip.member.keys' failed to satisfy constraint
I understand this as the values not being passed correctly but I can't see what the issue is with my code
//Create Request Values
AWSDynamoDBGetItemInput *getItem = [AWSDynamoDBGetItemInput new];
AWSDynamoDBAttributeValue *hashValue = [AWSDynamoDBAttributeValue new];
hashValue.S = #"User Test";
getItem.key = #{#"ripId": hashValue};
//Create Request Values 2
AWSDynamoDBGetItemInput *getItem2 = [AWSDynamoDBGetItemInput new];
AWSDynamoDBAttributeValue *hashValue2 = [AWSDynamoDBAttributeValue new];
hashValue2.S = #"User Test";
getItem2.key = #{#"chat": hashValue2};
//Combine to Batch Request
AWSDynamoDBBatchGetItemInput * batchFetch = [AWSDynamoDBBatchGetItemInput new];
batchFetch.requestItems = #{ #"rip": getItem,
#"chat": getItem,};
[[dynamoDB batchGetItem:batchFetch] continueWithBlock:^id(BFTask *task) {
if (!task.error) {
NSLog(#"BOY SUCCES");
} else {
NSLog(#" NO BOY SUCCESS %#",task.error);
}
return nil;
}];
Searched the internet high and low but cannot see a working example of a batch request using iOS Objective C (or swift for that matter).
I have tested both variables on a single Get request and they both work.
You forgot to wrap around AWSDynamoDBAttributeValue in AWSDynamoDBKeysAndAttributes. Here is a simple example from AWSDynamoDBTests.m:
AWSDynamoDBKeysAndAttributes *keysAndAttributes = [AWSDynamoDBKeysAndAttributes new];
keysAndAttributes.keys = #[#{#"hashKey" : attributeValue1},
#{#"hashKey" : attributeValue2}];
keysAndAttributes.consistentRead = #YES;
AWSDynamoDBBatchGetItemInput *batchGetItemInput = [AWSDynamoDBBatchGetItemInput new];
batchGetItemInput.requestItems = #{table1Name: keysAndAttributes};
Since the batch get doesn't map to a class I solved it by doing this instead.
I solved it by doing this,
let dynamoDBObjectMapper = AWSDynamoDBObjectMapper.defaultDynamoDBObjectMapper()
let task1 = dynamoDBObjectMapper.load(User.self, hashKey: "rtP1oQ5DJG", rangeKey: nil)
let task2 = dynamoDBObjectMapper.load(User.self, hashKey: "dbqb1zyUq1", rangeKey: nil)
AWSTask.init(forCompletionOfAllTasksWithResults: [task1, task2]).continueWithBlock { (task) -> AnyObject? in
if let users = task.result as? [User] {
print(users.count)
print(users[0].firstName)
print(users[1].firstName)
}
else if let error = task.error {
print(error.localizedDescription)
}
return nil
}
Swift 3
I was able to get the BatchGet request work with the following code. Hope this helps someone else who's struggling with the lack of Swift Docs.
This code assumes that you've configured your AWSServiceConfiguration in the AppDelegate application didFinishLaunchingWithOptions method.
let DynamoDB = AWSDynamoDB.default()
// define your primary hash keys
let hashAttribute1 = AWSDynamoDBAttributeValue()
hashAttribute1?.s = "NDlFRTdDODEtQzNCOC00QUI5LUFFMzUtRkIyNTJFNERFOTBF"
let hashAttribute2 = AWSDynamoDBAttributeValue()
hashAttribute2?.s = "MjVCNzU3MUQtMEM0NC00NEJELTk5M0YtRTM0QjVDQ0Q1NjlF"
let keys: Array = [["userID": hashAttribute1], ["userID": hashAttribute2]]
let keysAndAttributesMap = AWSDynamoDBKeysAndAttributes()
keysAndAttributesMap?.keys = keys as? [[String : AWSDynamoDBAttributeValue]]
keysAndAttributesMap?.consistentRead = true
let tableMap = ["Your-Table-Name" : keysAndAttributesMap]
let request = AWSDynamoDBBatchGetItemInput()
request?.requestItems = tableMap as? [String : AWSDynamoDBKeysAndAttributes]
request?.returnConsumedCapacity = AWSDynamoDBReturnConsumedCapacity.total
DynamoDB.batchGetItem(request!) { (output, error) in
if output != nil {
print("Batch Query output?.responses?.count:", output!.responses!)
}
if error != nil {
print("Batch Query error:", error!)
}
}