I have a column that contains some data like this:
{
"activity_goal": 200,
"members": [
{
"json": "data"
},
{
"HAHA": "HAHA"
},
{
"HAHA": "HAHA"
}
],
"name": "Hunters Team v3",
"total_activity": "0",
"revenue_goal": 200,
"total_active_days": "0",
"total_raised": 300
}
I am using cast(team_data -> 'members' as jsonb) to get the "Members" JSON array, which gives me a column like this:
[
{
"json": "data"
},
{
"HAHA": "HAHA"
},
{
"HAHA": "HAHA"
}
]
I am using array_length(cast(team_data -> 'members' as jsonb), 1) to pull a column with the number of Members that exist in the list. When I do this, I am given this error:
function array_length(jsonb, integer) does not exist
Note: I have also tried casting as "json" instead of "jsonb"
I am following this documentation. What am I doing wrong?
Use the JSON functions when working with json such as json_array_length
select json_array_length(team_data -> 'members') from mytable
Related
I used to download data from a json file in this format to my DataTables table:
{
"data": [
["n/a","668","01.11.2021 14:16:20", ... ],
["n/a","670","05.11.2021 23:23:54", ...]
]
}
...
"ajax": "first.json",
columns: [
{ data: 0 },
{ data: 1 }
...
And everythig was ok
But now format of my json was changed:
{
"data": {
"deals": [["n/a", "718", "30/11/2021 21:46:14"], ["", "718", "30/11/2021 21:46:14"], ... ],
"stops": [["07/10/2021 21:48:28", "BTCUSDT"], ["07/10/2021 21:48:28", "BTCUSDT"], ... ]
}
}
And I try to get data like this and get "No data available in table":
...
"ajax": "first.json",
columns: [
{ data: 'deals.0' },
{ data: 'deals.1' }
...
How can I get data from new format of json to my table?
Here is your new JSON structure, provided by the URL:
{
"data": {
"deals": [
["n/a", "718", "30/11/2021 21:46:14"],
["", "718", "30/11/2021 21:46:14"]
],
"stops": [
["07/10/2021 21:48:28", "BTCUSDT"],
["07/10/2021 21:48:28", "BTCUSDT"]
]
}
}
In this structure, the location of the deals data is data.deals. This location points to an array of arrays, which is what DataTables needs (or an array of objects).
(This means the table will only have access to the deals data, since the stops data is in a separate location entirely. But I will assume you only want the deals data to match your original example.)
You therefore need to use the DataTables dataSrc option to tell DataTables where to look in your new JSON:
<table id="example" class="display" style="width:100%"></table>
and:
$(document).ready(function() {
$('#example').DataTable( {
ajax: {
method: "GET",
url: "first.json", // or whatever URL you want to use
dataSrc: "data.deals"
},
"columns": [
{ "title": "Col 1" },
{ "title": "Col 2" },
{ "title": "Col 3" }
]
} );
} );
Because each row of data is an array, you don't need to specify the specific array indexes in your columns - DataTables will iterate over each row array for you.
The result is:
I have a nested structure json .
How to extract the specific elements(keys) and values?
How to access " sky: selling":"1"
Or "U1":"0000" ?
I tried json_object_keys and json_array_elements for extracting the array .
But I don't know exactly how to do this query.
Example code:
Table- record and column name : report
{
"PIname": {
"n1": "x1",
"n2": "x2",
"params": {
"S1": {
"code1": "y1",
"Code2": "y2",
},
"id": "2d",
"Dest": {
"Code3": "mi"
}
},
"PIDataArea": {
"m1": null,
"PInven": {
"head": {
"Code4": "Increase",
"line": "2020-01"
},
"PILine": [
{
"u1": "0000",
"u2": "0",
"u3": "1",
"modes": {
"#cID": "Sng",
"#txt": "12.21"
} },
{
"Qualify": ".0001",
"QOrder": "1",
"UPriceAmt": {
"#cID": "sng",
"#txt": "13" },
"sky:Qa": ".000",
"sky:Partcode": {
"#c1ID": "a"
},
"sky:SCode": "Ni",
"sky:PItem": {
"sky:ID": "h"
},
"sky:Forest": {
"sky:q1": [
{
"sky:selling": "1"
}
{
"sky:selling": "0"
}
]
} } }} }}
I tried lot ,one example query here like,
Select * from record r
Where exists( select report->'sky: selling' from json_each(r.report) b where b.value->>'sky:selling' Ilike '0');
You can use the json_path_query or jsonb_path_query function. Example to extract the element with key = "sky:selling" :
json_path_query(r.report, $.** ? (#.key == 'sky:selling'))
I have a JSON column with following JSON
{
"metadata": { "value": "JABC" },
"force": false,
"users": [
{ "id": "111", "comment": "abc" },
{ "id": "222", "comment": "abc" },
{ "id": "333" }
]
}
I am expecting list of IDs from the query output ["111","222", "333"]. I tried following query but getting null value.
select colName->'users'->>'id' ids from tableName
How to get this specific field value from the array of object?
You need to extract the array as rows and then get the id:
select json_array_elements(colName->'users')->>'id' ids from tableName;
If you're using jsonb rather than json, the function is jsonb_array_elements.
I am replacing an existing REST endpoint with GraphQL.
In our existing REST endpoint, we return a JSON array.
[{
"id": "ABC"
},
{
"id": "123"
},
{
"id": "xyz"
},
{
"id": "789"
}
]
GraphQL seems to be wrapping the array in two additional object layers. Is there any way to remove the "data" and "Client" layers?
Response data:
{
"data": {
"Client": [
{
"id": "ABC"
},
{
"id": "123"
},
{
"id": "xyz"
},
{
"id": "789"
}
]
}
}
My query:
{
Client(accountId: "5417727750494381532d735a") {
id
}
}
No. That was the whole purpose of GraphQL. To have a single endoint and allow users to fetch different type/granularity of data by specifying the input in a query format as opposed to REST APIs and then map them onto the returned JSON output.
'data' acts as a parent/root level container for different entities that you have queried. Without these keys in the returned JSON data, there won't be any way to segregate the corresponding data. e.g.
Your above query can be modified to include another entity like Owner,
{
Client(accountId: "5417727750494381532d735a") {
id
}
Owner {
id
}
}
In which case, the output will be something like
{
"data": {
"Client": [
...
],
"Owner": [
...
]
}
}
Without the 'Client' and 'Owner' keys in the JSON outout, there is no way to separate the corresponding array values.
In your case, you can get only the array by doing data.Client on the returned output.
I'd like to retrieve
document with _id of 1
OR
document with value === 13 AND anotherValue === 56
Error:
There is no index available for this selector.
This is my query:
{
"selector": {
"$or": [
{
"_id": "1"
},
{
"value": "13",
"anotherValue": "56"
}
]
}
}
Indexes setup:
Your available Indexes:
special: _id
json: value, anotherValue
json: _id, value, anotherValue
For this query you need to add a selector to get all the IDs like so:
{
"selector": {
"_id": {"$gt":null},
"$or": [
{
"_id": "1"
},
{
"value": "13",
"anotherValue": "56"
}
]
}
}
You can learn more here:
https://cloudant.com/blog/mango-json-vs-text-indexes/
And this SO post:
index and query items in an array with mango query for cloudant and couchdb 2.0
Alternatively, you can add a text index on all fields:
{
"index": {},
"type": "text"
}
And then your original selector should work.