Develop Reference

Is there a way to update items in an array with JsonPatch?

The API to be invoked uses JsonPatch. The following is a sample JSON.
{ "hello": false
, "array1":
[ { "subarray": [ "k2", "k1"] }
, { "subarray": [ "k1"] }
]
}
I would like to update both the subarrays (elements of the array1). There could be N number of elements/items in array1 that I'm not aware of when calling this API.
Now I can do the following if I am aware of the the size of array1.
[{ "op": "add", "path": "/array1/0/subarray/0", "value": "gk" }]
[{ "op": "add", "path": "/array1/1/subarray/0", "value": "gk" }]
But since I'm not aware of the the size of array1, it does not seem that this can be achieved using JsonPointer. Is there something that can be done to do an update that targets all the elements of array1 (i.e all the subarrays) in one go? Something like this:
[{ "op": "add", "path": "/array1/*/subarray1/0", "value": "gk-new" }]
After invocation, the resulting subarrays should have an additional element "gk-new" in addition to what they have?

There is no wildcard support in JsonPatch or JsonPointer. Therefore, what is asked in the question is not possible.

How to model the rows in getData() since i have nested JSON data?

I want to display these fields :name, age, addresses_id, addresses_city, addresses_primary for each person into data studio.
My JSON data
{
"data": [
{
"name": "Lio",
"age": 30,
"addresses": [
{
"id": 7834,
"city": "ML",
"primary": 1
},
{
"id": 5034,
"city": "MM",
"primary": 1
}
]
},
{
"name": "Kali",
"age": 41,
"addresses": [
{
"id": 3334,
"city": "WK",
"primary": 1
},
{
"id": 1730,
"city": "DC",
"primary": 1
}
]
},
...
]
}
there is no problem if i don't render the addresses field
return {
schema: requestedFields.build(),
rows: rows
};
//rows:
/*
"rows": [
{
"values": ["Lio", 30]
},
{
"values": ["Kali", 41]
},
...
]
*/
The problem is
I'm not able to model the nested JSON data in Google Data Studio. I
have the problem exactly in the "addresses" field.
Could anyone tell me what format should be for the rows in this case?

As you already know, for each name of your dataset, you clearly have more than one row (one person has multiple addresses). Data Studio only accepts a single data for each field, since arrays are not supported at all. So you need to work on this.
There are some ways to solve this, but always keep in mind that:
getSchema() should return all available fields for your connector (the order doesn't really matter, since Data Studio always sort alphabetically the available fields)
getData() should return a list of values. But here the order is relevant: it should be the same as the parameter passed to getData() (which means the results should be dynamic, sometimes you'll return all values, sometimes not, and the order may change).
Solution 1: Return multiple rows per record
Since you can produce multiple rows for each name, just do it.
To achieve this, your field definition (=getSchema()) should include fields address_id, address_city and address_primary (you can also add address_order if you need to know the position of the address in the list).
Supposing getData() is called with all fields in the same order they were discribed, rows array should look like this:
"rows": [
{
"values": ["Lio", 30, "7834", "ML", 1]
},
{
"values": ["Lio", 30, "5034", "MM", 1]
},
{
"values": ["Kali", 41, "3334", "WK", 1]
},
{
"values": ["Kali", 41, "1730", "DC", 1]
},
...
]
IMO, this is the best solution for your data.
Solution 2: Return one address only, ignoring others
If you prefer one row per person, you can get one of the addresses and display only it (usually the main/primary address, or the first one).
To achieve this, your field definition (=getSchema()) should include fields address_id, address_city and address_primary.
Supposing getData() is called with all fields in the same order they were discribed, rows array should look like this:
"rows": [
{
"values": ["Lio", 30, "7834", "ML", 1]
},
{
"values": ["Kali", 41, "3334", "WK", 1]
},
...
]
Solution 3: Return all addresses, serialized in a field
This is helpful if you really need all information but do not want a complex scheme.
Just create a field called addresses in your field definition (=getSchema()) and write the JSON there as a string (or any other format you want).
Supposing getData() is called with all fields in the same order they were discribed, rows array should look like this:
"rows": [
{
"values": ["Lio", 30, "[{\"id\": 7834, \"city\": "ML", \"primary\": 1}, {\"id\": 5034, \"city\": \"MM\", \"primary\": 1}]"]
},
{
"values": ["Kali", 41, "[{\"id\": 3334, \"city\": \"WK\", \"primary\": 1}, {\"id\": 1730, \"city\": \"DC\", \"primary\": 1}]"]
},
...
]
This solution may appear senseless, but it is possible to interact with this data later in DataStudio using REGEX if really needed.
Solution 4: Create a different field for each address
If you're sure all records has a maximum number of addresses (in you example, both names have 2 addresses, for example), you can create multiple fields.
Your field definition (=getSchema()) should include fields address_id1, address_city1, address_primary1, address_id2, ... address_primaryN.
I wouldn't explain how rows should look like in this situation, but it is not hard to guess with the other examples.

DocumentDB: How to filter document on array within array?

Let's say I have the following document:
{
"Id": "1",
"Properties": [
{
"Name": "Name1",
"PropertyTypes": [
"Type1"
]
},
{
"Name": "Name2",
"PropertyTypes": [
"Type1",
"Type2",
"Type3"
]
}
]
}
When I use the following SQL:
SELECT c.Id FROM c
JOIN p in c.Properties
WHERE ARRAY_CONTAINS(p.PropertyTypes,"Type1")
I get as return:
[
{
"Id": "1"
},
{
"Id": "1"
}
]
How do I change my query so that it only returns distinct documents?

As far as I know, Distinct hasn't supported by Azure Cosmos DB yet.
It seems that there is no way to remove the repeat data in the query SQL level.
You could handle with your query result set in the loop locally.
However, if your result data is large,I suggest you using a stored procedure to handle with result data in Azure Cosmos DB to release the pressure on your local server.
You could refer to the official tutorial about SP.

How to parse JSON data from nested array in PHP

I am struggling to retrieve some values from a JSON file formatted like this:
{
"#context": [
"https://raw.githubusercontent.com/geojson/geojson-ld/master/contexts/geojson-base.jsonld",
{
"wx": "https://api.weather.gov/ontology#",
"#vocab": "https://api.weather.gov/ontology#"
}
],
"type": "FeatureCollection",
"features": [
{
"id": "https://api.weather.gov/alerts/NWS-IDP-PROD-2485131-2320093",
"type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
-95.45,
32.36
],
[
-96.07,
32.36
],
[
-96.08,
32.76
],
[
-95.92,
32.82
],
[
-95.85,
32.77
],
[
-95.77,
32.77
],
[
-95.76,
32.75
],
[
-95.71,
32.75
],
[
-95.66,
32.71
],
[
-95.64,
32.72
],
[
-95.59,
32.68
],
[
-95.6,
32.48
],
[
-95.47,
32.37
],
[
-95.45,
32.36
]
]
]
},
"properties": {
"#id": "https://api.weather.gov/alerts/NWS-IDP-PROD-2485131-2320093",
"#type": "wx:Alert",
"id": "NWS-IDP-PROD-2485131-2320093",
"areaDesc": "Van Zandt",
"geocode": {
"UGC": [
"TXC467"
],
"SAME": [
"048467"
]
},
"references": [],
"sent": "2017-08-13T00:03:41+00:00",
"effective": "2017-08-13T00:03:41+00:00",
"onset": "2017-08-13T00:03:00+00:00",
"expires": "2017-08-13T01:00:00+00:00",
"ends": "2017-08-13T01:00:00+00:00",
"status": "Actual",
"messageType": "Alert",
"category": "Met",
"severity": "Severe",
"certainty": "Observed",
"urgency": "Immediate",
"event": "Severe Thunderstorm Warning",
"sender": "NWS Fort Worth TX",
"headline": "Severe Thunderstorm Warning issued August 12 at 7:03PM CDT expiring August 12 at 8:00PM CDT by NWS Fort Worth TX",
"description": "The National Weather Service in Fort Worth has issued a\n\n* Severe Thunderstorm Warning for...\nVan Zandt County in north central Texas...\n\n* Until 800 PM CDT.\n\n* At 703 PM CDT, a severe thunderstorm was located near Wills Point,\nmoving east at 25 mph.\n\nHAZARD...65 mph wind gusts and quarter size hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Hail damage to vehicles is expected. Expect wind damage\nto roofs, siding, and trees.\n\n* This severe thunderstorm will be near,\nCanton around 710 PM CDT.\nEdgewood around 715 PM CDT.\nFruitvale around 725 PM CDT.\nGrand Saline around 735 PM CDT.\nVan around 750 PM CDT.\n\nThis includes Interstate 20 between mile markers 513 and 542.",
"instruction": "For your protection get inside a sturdy structure and stay away from\nwindows.\n\nContinuous cloud to ground lightning is occurring with this storm.\nMove indoors immediately. Lightning can kill.\n\nHeavy rainfall is occurring with this storm, and may lead to flash\nflooding. Do not drive your vehicle through flooded roadways.",
"response": "Shelter",
"parameters": {
"eventMotionDescription": [
"2017-08-13T00:03:00.000-05:00...storm...277DEG...23KT...32.62,-95.97"
],
"hailSize": [
"1.00"
],
"windGust": [
65
],
"tornadoDetection": [
"POSSIBLE"
],
"VTEC": [
"/O.NEW.KFWD.SV.W.0313.170813T0003Z-170813T0100Z/"
],
"EAS-ORG": [
"WXR"
],
"PIL": [
"FWDSVRFWD"
],
"BLOCKCHANNEL": [
"CMAS",
"EAS",
"NWEM"
],
"eventEndingTime": [
"2017-08-13T01:00:00Z"
]
}
}
},
I am trying to get the values from the keys under the "properties" key. What I am struggling with is does the array start with "properties" nested under #context or under "features"? I am not familiar with JSON data that uses # keys.
There are more values I need. But for starters, I am just using the event key nested under "features" -> "properties" where most of the keys for the values I need. I am not getting output from that.
<?php
$url = 'http://stream.dfwstormforce.com/json/nat_alerts.json'; // path to your JSON file
$data = file_get_contents($url); // put the contents of the file into a variable
$result = json_decode($data, true); // decode the JSON feed
foreach($results as $result) {
dump($result); //this will dump the array
foreach($results['features'] as $data) {
dump($data['event']);
}
}
?>
-Thanks
EDIT: Added suggestion to code for json_decode

As others have stated, you need to pass true as a second param to json_decode if you want to the result to be an associative array.
The hierarchy is features/properties/event so you can look through the features and pull what you want out of the properties of each feature.
<?php
$url = 'http://stream.dfwstormforce.com/json/nat_alerts.json'; // path to your JSON file
$data = file_get_contents($url); // put the contents of the file into a variable
$results = json_decode($data, true); // decode the JSON feed
foreach($results['features'] as $currFeature)
{
$currEvent = $currFeature['properties']['event'];
echo $currEvent."\n";
}

Use json_decode($data, true). The true tells json_decode to return nested associative arrays instead of a object.

As BarNakedCoder said:
json_decode($data, true)
but you also need to replace
dump($data['event']
with:
dump($data[0]['event'])

DataTables Javascript AJAX with plain data array

I have an ajax call that returns:
[{"fields":
{"account_to": ["Bank Account - SECU", "11000"],
"posted_by": 1,
"amount": "1000",
"created_date": "2015-07-31T14:53:03.766Z",
"posting_date": "2015-07-31T14:53:03.763Z",
"account_from": ["Consulting Income - ABC", "41000"],
"company": "S&S Co"},
"model": "base.glentry", "pk": 8},
{"fields": ...
]
Note that there is no: {'data': [ data array ]} which all the examples have. I can find how to change the name so that 'data' can be something else, but how do I make it render like this with AJAX without manually processing the return value and wrapping the data?
Here is my javascript:
$('#dt').dataTable( {
"processing": true,
"ajax": "http://localhost:8000/gl/",
"columns": [
{"": "fields.amount"}
]
} );
I've tried all sorts of things, but get the same result. What can I do?