I'm trying to read individual value from be json array object to display in the page. I have tried with below code but couldn't make it. Please advise what am i doing wrong here.
Apperciate your help.
You can get the length of a JavaScript array via its property length. To access the array Reference in your object, you can use dot notation.
In combination, the following should do what you expect:
var obj = {
"Reference": [
{
"name": "xxxxxxxx",
"typeReference": {
"articulation": 0,
"locked": false,
"createdBy": {
"userName": "System",
},
"lastModifiedBy": {
"userName": "System",
},
"lastModified": 1391084398660,
"createdOn": 1391084398647,
"isSystem": true
},
...
},
...
]
};
console.log(obj.Reference.length);
In case you are actually dealing with a JSON string, not a JavaScript object, you will need to parse it first via JSON.parse().
You get the length of an array by simply access the length attribute.
For example [0,1,2,3].length === 4.
If you just want to loop through the array, use forEach or map instead of a for loop. It's safer, cleaner, less hassle and you don't meed to know the length.
E.g.
[0,1,2,3].forEach(num => console.log(num))
Related
I'm new at power automate. Im puzzled about accessing property or value from Append to array variable like the "pr_no" using variables('PRNoRows')[value]['pr_no'] but i can't get it done. Please see below the result of the array. I am gladly happy if someone knows any approaces on how to get the properties of the array. Thank you.
{
"name": "PRNoRows",
"value": {
"#odata.context": "https://asia-001.azure-apim.net/apim/sql/409448f6faf34be39bbfc/$metadata#datasets('default%2Cdefault')/tables('%5Bdbo%5D.%5BvwithPayment%5D')/items",
"value": [
{
"#odata.etag": "",
"ItemInternalId": "906fe260-c67a-49fb-a32e-f6facf75c907",
"id": 8259,
"control_number": "P-CR003920",
"cr_date": "2021-12-13T00:00:00Z",
"company_id": 1,
"code_count": 3920,
"cr_no": "CR# 03320",
"pr_no": "25342",
"pr_date": "12/10/2021"
}
]
}
}
The value property has [], which means it is an array within an array. You can use an index to retrieve the pr_no of a specific item of the array.
Try the following expression (this will retrieve the pr_no value of the first item in the value property of the first item in your array variable)
variables('PRNoRows')[0]['value'][0]['pr_no']
With the following code Arr::set($array, 'messages.to.email', $value);
That will generate an output like:
{
"messages": {
"subject": "this is out email",
"to": {
"email": "myemail#gmail.com"
}
}
}
My issue is that I need this output instead:
{
"messages": [{
"subject": "this is out email",
"to": {
"email": "myemail#gmail.com"
}
}]
}
Being messages an array of objects. I haven't been able to find a native way of doing it, so I'm thinking of manually adding something like messages[].to.email
Am I missing something? A magic helper or syntax? to achieve what I'm looking for?
If you used an index for the messages it would force it to be an array:
Arr::set($array, 'messages.0.to.email', $value);
This is just adding another level/container to this by specificying that there is something between 'messages' and 'to'. Could be named anything, but 0 is for zero indexed array here, which would be an array in JSON not an object.
In Elasticsearch, I have an object that contains an array of objects. Each object in the array have type, id, updateTime, value fields.
My input parameter is an array that contains objects of the same type but different values and update times. Id like to update the objects with new value when they exist and create new ones when they aren't.
I'd like to use Painless script to update those but keep them distinct, as some of them may overlap. Issue is that I need to use both type and id to keep them unique. So far I've done it with bruteforce approach, nested for loop and comparing elements of both arrays, but I'm not too happy about that.
One of the ideas is to take array from source, build temporary HashMap for fast lookup, process input and later store all objects back into source.
Can I create HashMap with custom object (a class with type and id) as a key? If so, how to do it? I can't add class definition to the script.
Here's the mapping. All fields are 'disabled' as I use them only as intermidiate state and query using other fields.
{
"properties": {
"arrayOfObjects": {
"properties": {
"typ": {
"enabled": false
},
"id": {
"enabled": false
},
"value": {
"enabled": false
},
"updated": {
"enabled": false
}
}
}
}
}
Example doc.
{
"arrayOfObjects": [
{
"typ": "a",
"id": "1",
"updated": "2020-01-02T10:10:10Z",
"value": "yes"
},
{
"typ": "a",
"id": "2",
"updated": "2020-01-02T11:11:11Z",
"value": "no"
},
{
"typ": "b",
"id": "1",
"updated": "2020-01-02T11:11:11Z"
}
]
}
And finally part of the script in it's current form. The script does some other things, too, so I've stripped them out for brevity.
if (ctx._source.arrayOfObjects == null) {
ctx._source.arrayOfObjects = new ArrayList();
}
for (obj in params.inputObjects) {
def found = false;
for (existingObj in ctx._source.arrayOfObjects) {
if (obj.typ == existingObj.typ && obj.id == existingObj.id && isAfter(obj.updated, existingObj.updated)) {
existingObj.updated = obj.updated;
existingObj.value = obj.value;
found = true;
break;
}
}
if (!found) {
ctx._source.arrayOfObjects.add([
"typ": obj.typ,
"id": obj.id,
"value": params.inputValue,
"updated": obj.updated
]);
}
}
There's technically nothing suboptimal about your approach.
A HashMap could potentially save some time but since you're scripting, you're already bound to its innate inefficiencies... Btw here's how you initialize & work with HashMaps.
Another approach would be to rethink your data structure -- instead of arrays of objects use keyed objects or similar. Arrays of objects aren't great for frequent updates.
Finally a tip: you said that these fields are only used to store some intermediate state. If that weren't the case (or won't be in the future), I'd recommend using nested arrays to enable querying independently of other objects in the array.
I my Nifi controller I want to configure the FreeFormTextRecordSetWriter, but I have no Idea what I should put in the "Text" field. I'm getting the text from my source (in my case GetSolr), and just want to write this, period.
Documentation and mailinglist do not seem to tell me how this is done, any help appreciated.
EDIT: Here the sample input + output I want to achieve (as you can see: not ransformation needed, plain text, no JSON input)
EDIT: I now realize, that I can't tell GetSolr to return just CSV data - but I have to use Json
So referencing with attribute seems to be fine. What the documentation omits is, that the ${flowFile} attribute should containt the complete flowfile that is returned.
Sample input:
{
"responseHeader": {
"zkConnected": true,
"status": 0,
"QTime": 0,
"params": {
"q": "*:*",
"_": "1553686715465"
}
},
"response": {
"numFound": 3194,
"start": 0,
"docs": [
{
"id": "{402EBE69-0000-CD1D-8FFF-D07756271B4E}",
"MimeType": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"FileName": "Test.docx",
"DateLastModified": "2019-03-27T08:05:00.103Z",
"_version_": 1629145864291221504,
"LAST_UPDATE": "2019-03-27T08:16:08.451Z"
}
]
}
}
Wanted output
{402EBE69-0000-CD1D-8FFF-D07756271B4E}
BTW: The documentation says this:
The text to use when writing the results. This property will evaluate the Expression Language using any of the fields available in a Record.
Supports Expression Language: true (will be evaluated using flow file attributes and variable registry)
I want to use my source's text, so I'm confused
You need to use expression language as if the record's fields are the FlowFile's attributes.
Example:
Input:
{
"t1": "test",
"t2": "ttt",
"hello": true,
"testN": 1
}
Text property in FreeFormTextRecordSetWriter:
${t1} k!${t2} ${hello}:boolean
${testN}Num
Output(using ConvertRecord):
test k!ttt true:boolean
1Num
EDIT:
Seems like what you needed was reading from Solr and write a single column csv. You need to use CSVRecordSetWriter. As for the same,
I should tell you to consider to upgrade to 1.9.1. Starting from 1.9.0, the schema can be inferred for you.
otherwise, you can set Schema Access Strategy as Use 'Schema Text' Property
then, use the following schema in Schema Text
{
"name": "MyClass",
"type": "record",
"namespace": "com.acme.avro",
"fields": [
{
"name": "id",
"type": "int"
}
]
}
this should work
I'll edit it into my answer. If it works for you, please choose my answer :)
I'm trying to decide upon the best format of response for my API. I need to return a reports response which provides information on the report itself and the fields contained on it. Fields can be of differing types, so there can be: SelectList; TextArea; Location etc..
They each use different properties, so "SelectList" might use "Value" to store its string value and "Location" might use "ChildItems" to hold "Longitude" "Latitude" etc.
Here's what I mean:
"ReportList": [
{
"Fields": [
{
"Id": {},
"Label": "",
"Value": "",
"FieldType": "",
"FieldBankFieldId": {},
"ChildItems": [
{
"Item": "",
"Value": ""
}
]
}
]
}
The problem with this is I'm expecting the users to know when a value is supposed to be null. So I'm expecting a person looking to extract the value from "Location" to extract it from "ChildItems" and not "Value". The benefit to this however, is it's much easier to query for things than the alternative which is the following:
"ReportList": [
{
"Fields": [
{
"SelectList": [
{
"Id": {},
"Label": "",
"Value": "",
}
]
"Location": [
{
"Id": {},
"Label": "",
"Latitude": "",
"Longitude": "",
"etc": "",
}
]
}
]
}
So this one is a reports list that contains a list of fields which on it contains a list of fieldtype for every fieldtype I have (15 or something like that). This is opposed to just having a list of reports which has a list of fields with a "fieldtype" enum which I think is fairly easy to manipulate.
So the Question: Which format is best for a response? Any alternatives and comments appreciated.
EDIT:
To query all fields by fieldtype in a report and get values with the first way it would go something like this:
foreach(field in fields)
{
switch(field.fieldType){
case FieldType.Location :
var locationValue = field.childitems;
break;
case FieldType.SelectList:
var valueselectlist = field.Value;
break;
}
The second one would be like:
foreach(field in fields)
{
foreach(location in field.Locations)
{
var latitude = location.Latitude;
}
foreach(selectList in field.SelectLists)
{
var value= selectList.Value;
}
}
I think the right answer is the first one. With the switch statement. It makes it easier to query on for things like: Get me the value of the field with the id of this guid. It just means putting it through a big switch statement.
I went with the first one because It's easier to query for the most common use case. I'll expect the client code to put it into their own schema if they want to change it.