I should get the DynamoDb id for Justin. The call doesn't seem to fail. If i console.log(returned) i get an [object Object]. When i try to get to the returned.data.getIdFromUserName.id or returned.data.getIdFromUserName.email (anything else in the table) i get undefined. What am i missing?
Returned data:
{
"data": {
"getIdFromUserName": {
"items": [
{
"id": "3a5a2ks4-f137-41e2-a604-594e0c52a298",
"userName": "Justin",
"firstname": "null",
"weblink": "#JustinTimberlake",
"email": "iuiubiwewe#hotmail.com",
"mobileNum": "+0123456789",
"profilePicURI": "null",
"listOfVideosSeen": null,
"userDescription": "I wanna rock your body, please stay",
"isBlocked": false,
"GridPairs": null
}
],
"nextToken": null
}
}
}
I'd suggest getting a better idea of what console.log(returned) is printing.
Try console.log(JSON.stringify(returned, null, 2)) to inspect what is being returned.
EDIT: The data you're working with looks like this:
{
"data": {
"getIdFromUserName": {
"items": [
{
"id": "3a5a2ks4-f137-41e2-a604-594e0c52a298",
"userName": "Justin",
"firstname": "null",
"weblink": "#JustinTimberlake",
"email": "iuiubiwewe#hotmail.com",
"mobileNum": "+0123456789",
"profilePicURI": "null",
"listOfVideosSeen": null,
"userDescription": "I wanna rock your body, please stay",
"isBlocked": false,
"GridPairs": null
}
],
"nextToken": null
}
}
}
Pay close attention to the structure of that response. Both data and getIdFromUserName are maps. The content of data.getIdFromUserName is an array named items. Therefore, data.getIdFromUserName.items is an array containing the results of your query. You'll need to iterate over that array to get the data you are looking for.
For example, data.getIdFromUserName.items[0].id would be 3a5a2ks4-f137-41e2-a604-594e0c52a298
To access the email it would be data.getIdFromUserName.items[0].email.
Related
In my dynamodb table, I have a scenario where when I add a new item to my table, I need to also increment a counter for another entry in my table.
For instance, when USER#1 follows USER#2, I would like to increment followers count for USER#2.
HashKey
RangeKey
counter
USER1
USER2
USER3
USER2
USER2
USER2
2
I do not want to use auto-increment as I want to control how the increment happens.
Naturally, everything works as expected if I make two update calls to dynamodb. One to create the relationship between users and another to update the count for the other user.
The question is, if it is a good approach to make two such calls or would a transactWrite be a better alternative.
If so how could I make an increment using transactwrite api.
I can add items using the following approach. But I am not sure how I can increment
"TransactItems": [
{
"Put": {
"TableName": "Table",
"Item": {
"hashKey": {"S":"USER1"},
"rangeKey": {"S":"USER2"}
}
}
},
{
"Update": {
"TableName": "TABLE",
"Key": {
"hashKey": {"S":"USER2"},
"rangeKey": {"S":"USER2"}
},
"ConditionExpression": "#cefe0 = :cefe0",
"ExpressionAttributeNames": {"#cefe0":"counter"},
"ExpressionAttributeValues": ?? how do I increment here
}
}
]
Transactions would defintely be the best way to approach it, you can increment using SET in the UpdateExpression:
"TransactItems": [
{
"Put": {
"TableName": "Table",
"Item": {
"hashKey": {"S":"USER1"},
"rangeKey": {"S":"USER2"}
}
}
},
{
"Update": {
"TableName": "TABLE",
"Key": {
"hashKey": {"S":"USER2"},
"rangeKey": {"S":"USER2"}
},
"UpdateExpression": "SET #cefe0 = #cefe0 + :cefe0",
"ExpressionAttributeNames": {"#cefe0":"counter"},
"ExpressionAttributeValues": {"cefe0": {"N": "1"}}
}
}
]
I'm hustling with regex, and trying to get the id's from this body.
But only the id´s in the members list, and not the id in the verified key. :)
To clarify, I'm using Regular Expression Extractor in JMeter
{
"id": "9c40ffca-0f1a-4f93-b068-1f6332707d02", //<--not this
"me": {
"id": "38a2b866-c8a9-424f-a5d4-93b379f080ce", //<--not this
"isMe": true,
"user": {
"verified": {
"id": "257e30f4-d001-47b3-9e7f-5772e591970b" //<--not this
}
}
},
"members": [
{
"id": "88a2b866-c8a9-424f-a5d4-93b379f780ce", //<--this
"isMe": true,
"user": {
"verified": {
"id": "223e30f4-d001-47b3-9e7f-5772e781970b" //<--not this
}
}
},
{
"id": "53cdc218-4784-4e55-a784-72e6a3ffa9bc", //<--this
"isMe": false,
"user": {
"unverified": {
"verification": "XYZ"
}
}
}
]
}
at the moment I have this regex :
("id": )("[\w-]+")
But as you can see here it returns every guid
Any ideas on how to go on?
Thanks in advance.
Since the input data type is JSON, it is recommended to use the JMeter's JSON Path Extractor Plugin.
Once you add it, use the
$.members[*].id
JSON path expression to match all id values of each members in the document that are the top nodes.
If you may have nested memebers, you may get them all using
$..members[*].id
You may test these expressions at https://jsonpath.com/, see a test:
The schema:
type User {
id: ID!
createdCurricula: [Curriculum]
}
type Curriculum {
id: ID!
title: String!
creator: User!
}
The resolver to query all curricula of a given user:
{
"version" : "2017-02-28",
"operation" : "Query",
"query" : {
## Provide a query expression. **
"expression": "userId = :userId",
"expressionValues" : {
":userId" : {
"S" : "${context.source.id}"
}
}
},
"index": "userIdIndex",
"limit": #if(${context.arguments.limit}) ${context.arguments.limit} #else 20 #end,
"nextToken": #if(${context.arguments.nextToken}) "${context.arguments.nextToken}" #else null #end
}
The response map:
{
"items": $util.toJson($context.result.items),
"nextToken": #if(${context.result.nextToken}) "${context.result.nextToken}" #else null #end
}
The query:
query {
getUser(id: "0b6af629-6009-4f4d-a52f-67aef7b42f43") {
id
createdCurricula {
title
}
}
}
The error:
{
"data": {
"getUser": {
"id": "0b6af629-6009-4f4d-a52f-67aef7b42f43",
"createdCurricula": null
}
},
"errors": [
{
"path": [
"getUser",
"createdCurricula"
],
"locations": null,
"message": "Can't resolve value (/getUser/createdCurricula) : type mismatch error, expected type LIST"
}
]
}
The CurriculumTable has a global secondary index titled userIdIndex, which has userId as the partition key.
If I change the response map to this:
$util.toJson($context.result.items)
The output is the following:
{
"data": {
"getUser": {
"id": "0b6af629-6009-4f4d-a52f-67aef7b42f43",
"createdCurricula": null
}
},
"errors": [
{
"path": [
"getUser",
"createdCurricula"
],
"errorType": "MappingTemplate",
"locations": [
{
"line": 4,
"column": 5
}
],
"message": "Unable to convert \n{\n [{\"id\":\"87897987\",\"title\":\"Test Curriculum\",\"userId\":\"0b6af629-6009-4f4d-a52f-67aef7b42f43\"}],\n} to class java.lang.Object."
}
]
}
If I take that string and run it through a console.log in my frontend app, I get:
{
[{"id":"2","userId":"0b6af629-6009-4f4d-a52f-67aef7b42f43"},{"id":"1","userId":"0b6af629-6009-4f4d-a52f-67aef7b42f43"}]
}
That's clearly an object. How do I make it... not an object, so that AppSync properly reads it as a list?
SOLUTION
My response map had a set of curly braces around it. I'm pretty sure that was placed there in the generator by Amazon. Removing them fixed it.
I think I'm not seeing the complete view of your schema, I was expecting something like:
schema {
query: Query
}
Where Query is RootQuery, in fact you didn't share us your Query definition. Assuming you have the right Query definition. The main problem is in your response template.
> "items": $util.toJson($context.result.items)
This means that you are passing a collection named: *"items"* to Graphql query engine. And you are referring this collection as "createdCurricula". So solve this issue your response-mapping-template is the right place to fix. How? just replace the above line with the following.
"createdCurricula": $util.toJson($context.result.items),
Please the main thing to note here is, the mapping template is a bridge between your datasources and qraphql, feel free to make any computation, or name mapping but don't forget that object names in that response json are the one should match in schema/query definition.
Thanks.
Musema
change to result type to $util.toJson($ctx.result.data.posts)
The exception msg says that it expected a type list.
Looking at:
{
[{"id":"2","userId":"0b6af629-6009-4f4d-a52f-67aef7b42f43"},{"id":"1","userId":"0b6af629-6009-4f4d-a52f-67aef7b42f43"}]
}
I don't see that createdCurricula is a LIST.
What is currently in DDB is:
"id": "0b6af629-6009-4f4d-a52f-67aef7b42f43",
"createdCurricula": null
I want to get: List<User>. I have endpoint(GET) for getting users. It gets:
[
{
"id": "d71dcbca-54f3-4b19-aec4-3776bfe34730",
"name": "test",
"surname": "test",
"login": "test",
"password": "-26104458",
"email": "test",
"role": "user"
}
]
I try get getting this list with using rest template:
ResponseEntity<User[]> responseEntity = rest.getForEntity(my-endpoint, User[].class);
return Arrays.asList(responseEntity.getBody());
But I get this errror:
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type
Question: How to get List<User> with using rest template?
Maybe you want to try this approach:
ResponseEntity<List<User>> responseEntity = rest.exchange(
"your-endpoint",
HttpMethod.GET,
null,
new ParameterizedTypeReference<List<User>>() {
});
See also https://docs.spring.io/spring/docs/4.3.12.RELEASE/spring-framework-reference/htmlsingle/#rest-resttemplate
I'm creating a skill in Alexa that does the following.
User : Hi
Alexa, hello please give me your name
User : John
Alexa : Hi John, good to meet you. How old are you
User : 25
Below are my intents
{
"intents": [
{
"intent": "StartTheFlow",
"slots": [
{
"name": "custName",
"type": "list_of_userNames"
},
{
"name": "age",
"type": "AMAZON.NUMBER"
}
]
},
{
"intent": "AMAZON.HelpIntent"
},{
"intent": "Welcome"
},
{
"intent": "AMAZON.StopIntent"
},
{
"intent": "AMAZON.CancelIntent"
}
]
}
And below are my utterances
StartTheFlow Hi
StartTheFlow {custName}
StartTheFlow {age}
Below is my onIntent()
#Override
public SpeechletResponse onIntent(final IntentRequest request, final Session session) throws SpeechletException {
log.info("onIntent requestId={}, sessionId={}", request.getRequestId(), session.getSessionId());
Intent intent = request.getIntent();
String intentName = (intent != null) ? intent.getName() : null;
if ("StartTheFlow".equals(intentName)) {
return getTheFlow(intent, session);
} else if ("AMAZON.HelpIntent".equals(intentName)) {
return getHelpResponse();
} else if ("WelcomeChubb".equals(intentName)) {
return getWelcomeResponse();
} else {
throw new SpeechletException("Invalid Intent");
}
}
And I'm trying to handle this as below
private SpeechletResponse getTheFlow(Intent intent, Session session) {
boolean isAskResponse = true;
String responseText = "";
String nameFromSession = (String) session.getAttribute("name");
if (StringUtils.isNullOrEmpty(nameFromSession)) {
responseText = "please give me your name";
getTheNameText(intent, session);
} else {
System.out.println(session.getAttribute("nameFromSession"));
responseText = "please give me your date of birth";
}
return getSpeechletResponse(responseText, "", isAskResponse);
}
private String getTheNameText(Intent intent, Session session) {
String userNameFrmIntent = getNameFromSlot(intent).toString();
session.setAttribute("nameFromSession", userNameFrmIntent);
return getNameFromSlot(intent).toString();
}
private String getNameFromSlot(Intent intent) {
Slot userName = intent.getSlot(Slot_Name);
return userName.getValue();
}
Also, I've defined a slot in the top as below.
private static final String Slot_Name = "custName";
But here when I type Hi, Instead of asking me my name, it is giving me an error in logs it shows Java NullPointer Exception. the response that I get when I type Hi is as below.
{
"session": {
"sessionId": "SessionId.a2740ca4-73ff-4a15-856d-6461b3c7b2e1",
"application": {
"applicationId": "amzn1.ask.skill.e3dfb30e-0089-423c-a325-30ad28dd2e2b"
},
"attributes": {},
"user": {
"userId": "amzn1.ask.account.AEQYTT5HFHEGGDSUCT3NW45HKR7O3FBL5YCBSZIS7P5LNP5BXFEMUR7AUYOZVKC2FT5V6RKJC7RNA5VMZVREBAXAQP3NFNTQSFSSKSEXIYT4FQYMS5JCI2CCAOPUF4FN4C6DHEU6ONNY3D6GN5AWK75KOQNJH2IWROIIXTPNXSNI6FLQYRBBMP7TRSOWVNCY73WJUT2VLHDACWA"
},
"new": true
},
"request": {
"type": "IntentRequest",
"requestId": "EdwRequestId.cf686fc0-cbfd-4496-bb09-c41714563507",
"locale": "en-US",
"timestamp": "2017-02-15T20:12:44Z",
"intent": {
"name": "StartTheFlow",
"slots": {
"custName": {
"name": "custName",
"value": "hi"
}
}
}
},
"version": "1.0"
}
Can someone please let me know where am I going wrong and how can I fix this, I've quite a number of questions to be linked, like 25, can Someone please let me know if there is a better way to do this in java.
Thanks
I would recommend creating a separate intent for each thing that the user says. So for example, HelloIntent, NameIntent, and AgeIntent.
Then be sure to pass those bits of information forward to all following intents in the session. So each intent could use a common function at the beginning to read each string from the session (if exists), add the new slot data to it, and then write all the strings back to the response session before finishing.
Since you'll then have separate intents, and the user could conceivably say them out of order, you may want to check that all the needed strings have been entered, or else prompt the user for any missing strings.
The problem with saving data in the session is that the data will be gone the next time the user starts the skill. To resolve this, you could use a database to hold the users data, saving it keyed to the userId. There are lots of examples on how to do that. Be careful that some databases are essentially free, but others will charge you depending on how many times it is used each month.