using couchbase 5
I need to build a query string from this object
[
{
"_id": 190,
"querystring": [
{
"name": "p1",
"value": "val1"
},
{
"name": "p2",
"value": "val2"
}
]
}
]
the expected output should be
p1=val1&p2=val2
can anyone help here?
after few attempts I think I got closer to the solution I need.
[
{
"_id": 190,
"res": [
"company_id=$PREFIJO&",
"user_country=$COUNTRY&",
"offer_unique_code=$PIXEL&",
"pub_id=$PUBID&"
]
}
]
now, how can I convert "res" to a concatenated string of all the array elements?
WITH obj AS ({ "_id": 190, "querystring": [ { "name": "p1", "value": "val1" }, { "name": "p2", "value": "val2" } ] })
SELECT obj._id, CONCAT2("&", ARRAY CONCAT2("=",v.name,v.`value`) FOR v IN obj.querystring END) AS res;
Array of objects
WITH objs AS ([{ "_id": 190, "querystring": [ { "name": "p1", "value": "val1" }, { "name": "p2", "value": "val2" } ] },
{ "_id": 191, "querystring": [ { "name": "p3", "value": "val1" }, { "name": "p4", "value": "val2" } ] }
])
SELECT obj._id, CONCAT2("&", ARRAY CONCAT2("=",v.name,v.`value`) FOR v IN obj.querystring END) AS res FROM objs AS obj ;
Older version where CONCAT2() not available, get array of strings (name=val) and do in application or use the following technique. Assume your name/val doesn't have any replace characters.
WITH objs AS ([{ "_id": 190, "querystring": [ { "name": "p1", "value": "val1" }, { "name": "p2", "value": "val2" } ] },
{ "_id": 191, "querystring": [ { "name": "p3", "value": "val1" }, { "name": "p4", "value": "val2" } ] }
])
SELECT obj._id, replace(replace(replace(encode_json(ARRAY CONCAT(v.name,"=",v.`value`) FOR v IN obj.querystring END),"\",\"","&"),"[\"",""),"\"]","") AS res FROM objs AS obj ;
If single document then have ARRAY of objects then use UNNEST
If there is number , convert to string using TO_STR() before CONCAT operation
https://docs.couchbase.com/server/current/n1ql/n1ql-language-reference/stringfun.html#fn-str-concat2
Related
I have an array of json objects like this
[
{
"events": [
{
"type": "message",
"attributes": [
{
"key": "action",
"value": "withdraw_reward"
},
{
"key": "sender",
"value": "bob"
},
{
"key": "module",
"value": "distribution"
},
{
"key": "sender",
"value": "bob"
}
]
},
{
"type": "credit",
"attributes": [
{
"key": "recipient",
"value": "ross"
},
{
"key": "sender",
"value": "bob"
},
{
"key": "amount",
"value": "100"
}
]
},
{
"type": "rewards",
"attributes": [
{
"key": "amount",
"value": "100"
},
{
"key": "validator",
"value": "sarah"
}
]
}
]
},
{
"events": [
{
"type": "message",
"attributes": [
{
"key": "action",
"value": "withdraw_reward"
},
{
"key": "sender",
"value": "bob"
},
{
"key": "module",
"value": "distribution"
},
{
"key": "sender",
"value": "bob"
}
]
},
{
"type": "credit",
"attributes": [
{
"key": "recipient",
"value": "ross"
},
{
"key": "sender",
"value": "bob"
},
{
"key": "amount",
"value": "100"
}
]
},
{
"type": "rewards",
"attributes": [
{
"key": "amount",
"value": "200"
},
{
"key": "validator",
"value": "Ryan"
}
]
}
]
}
]
How to traverse through the types, check if it's type equals to rewards and then go through the attributes and verify if the validator equals to sarah and fetch the value of the key amount? Pretty new to scala and play framework. Any help would be great. Thanks
You could parse your JSON into a structure of case classes for easier handling and then extract the wanted field like so:
val json =
"""[
{"events":[
{
"type":"message","attributes":[
{"key":"action","value":"withdraw_reward"},
{"key":"sender","value":"bob"},
{"key":"module","value":"distribution"},
{"key":"sender","value":"bob"}
]},
{
"type":"credit","attributes":[
{"key":"recipient","value":"ross"},
{"key":"sender","value":"bob"},
{"key":"amount","value":"100"}
]},
{
"type":"rewards","attributes":[
{"key":"amount","value":"100"},
{"key":"validator","value":"sara"}
]}
]
},
{"events":[
{
"type":"message","attributes":[
{"key":"action","value":"withdraw_reward"},
{"key":"sender","value":"bob"},
{"key":"module","value":"distribution"},
{"key":"sender","value":"bob"}
]},
{
"type":"credit","attributes":[
{"key":"recipient","value":"ross"},
{"key":"sender","value":"bob"},
{"key":"amount","value":"100"}
]},
{
"type":"rewards","attributes":[
{"key":"amount","value":"200"},
{"key":"validator","value":"Ryan"}
]}
]
}
]
"""
case class EventWrapper(events: Seq[Event])
case class KeyValue(key: String, value: String)
case class Event(`type`: String, attributes: Seq[KeyValue])
import play.api.libs.json._
implicit val kvReads: Reads[KeyValue] = Json.reads[KeyValue]
implicit val eventReads: Reads[Event] = Json.reads[Event]
implicit val eventWrapperReads: Reads[EventWrapper] = Json.reads[EventWrapper]
val rewardAmountsValidatedBySara = Json
.parse(json)
.as[Seq[EventWrapper]]
.flatMap {
_.events.collect {
case Event(t, attributes) if t == "rewards" && attributes.contains(KeyValue("validator", "sara")) =>
attributes.collect {
case KeyValue("amount", value) => value
}
}.flatten
}
val amount = rewardAmountsValidatedBySara.head
For your example, rewardAmountsValidatedBySara would yield a List of Strings containing only the String "100". Which you could retrieve (potentially unsafe) with .head as shown above.
Normally you would not do this, as it could throw an exception on an empty List, so it would be better to use .headOption which returns an Option which you can then handle safely.
Note that the implicit Reads are Macros, which automatically translate into Code, that instructs the Play Json Framework how to read the JsValue into the defined case classes, see the documentation for more info.
How can I sort the given JSON object with property count. I want to sort the entire sub-object. The higher the count value should come on the top an so on.
{
"Resource": [
{
"details": [
{
"value": "3.70"
},
{
"value": "3.09"
}
],
"work": {
"count": 1
}
},
{
"details": [
{
"value": "4"
},
{
"value": "5"
}
],
"work": {
"count": 2
},
{
"details": [
{
"value": "5"
},
{
"value": "5"
}
],
"work": "null"
}
]
}
You can try this example to sort your data:
data = {
"data": {
"Resource": [
{
"details": [{"value": "3.70"}, {"value": "3.09"}],
"work": {"count": 1},
},
{"details": [{"value": "4"}, {"value": "5"}], "work": {"count": 2}},
]
}
}
# sort by 'work'/'count'
data["data"]["Resource"] = sorted(
data["data"]["Resource"], key=lambda r: r["work"]["count"]
)
# sort by 'details'/'value'
for r in data["data"]["Resource"]:
r["details"] = sorted(r["details"], key=lambda k: float(k["value"]))
# pretty print:
import json
print(json.dumps(data, indent=4))
Prints:
{
"data": {
"Resource": [
{
"details": [
{
"value": "3.09"
},
{
"value": "3.70"
}
],
"work": {
"count": 1
}
},
{
"details": [
{
"value": "4"
},
{
"value": "5"
}
],
"work": {
"count": 2
}
}
]
}
}
I have a single table in database like database table. I want to search a child from database and return a hierarchical JSON to a front end in order to create a tree. How can I do that in FLASK.
My expected JSON for mat should be like expected JSON
Since you have tagged your question with flask, this post assumes you are using Python as well. To format your database values in JSON string, you can query the db and then use recursion:
import sqlite3, collections
d = list(sqlite3.connect('file.db').cursor().execute("select * from values"))
def get_tree(vals):
_d = collections.defaultdict(list)
for a, *b in vals:
_d[a].append(b)
return [{'name':a, **({} if not (c:=list(filter(None, b))) else {'children':get_tree(b)})} for a, b in _d.items()]
import json
print(json.dumps(get_tree(d), indent=4))
Output:
[
{
"name": "AA",
"children": [
{
"name": "BB",
"children": [
{
"name": "EE",
"children": [
{
"name": "JJ",
"children": [
{
"name": "EEV"
},
{
"name": "FFW"
}
]
},
{
"name": "KK",
"children": [
{
"name": "HHX"
}
]
}
]
}
]
},
{
"name": "CC",
"children": [
{
"name": "FF",
"children": [
{
"name": "LL",
"children": [
{
"name": "QQY"
}
]
},
{
"name": "MM",
"children": [
{
"name": "RRV"
}
]
}
]
},
{
"name": "GG",
"children": [
{
"name": "NN",
"children": [
{
"name": "SSW"
}
]
}
]
}
]
},
{
"name": "DD",
"children": [
{
"name": "HH",
"children": [
{
"name": "OO",
"children": [
{
"name": "TTZ"
}
]
}
]
},
{
"name": "II",
"children": [
{
"name": "PP",
"children": [
{
"name": "UUW"
}
]
}
]
}
]
}
]
}
]
I use angular 7.
my query return a json data which has this format :
[
{
"text": "test 1",
"value": "1",
"nbr": "1",
"children": [
{
"text": "test 1_1",
"value": "1_1",
"nbr": "2",
"children": [
{
"text": "test 1_1_1",
"value": "1_1_1",
"nbr": "1",
"children": []
},
{
"text": "test 1_1_2"",
"value": "1_1_2",
"nbr": "0",
"children": []
},
{
"text": "test 1_1_3"",
"value": "1_1_3",
"nbr": "0",
"children": []
}
]
},
{
"text": "test 1_2",
"value": "1_2",
"nbr": "0",
"children": []
}
]
},
{
"text": "test 2",
"value": "2",
"nbr": "0",
"children": []
}
]
I want to loop this data and essentially loop the children data.
and I want to make some test.
I try with this code which has problem to loop children data.
this.httpservice.query({
}).subscribe((res: HttpResponse<TestEntity[]>) => {
this.temp= res.body;
this.temp.forEach((x) => {
x["children"].forEach(x => {
if(x.nbr=='0')
{
// test code
}
x["children"].forEach(x => {
if(x.nbr=='0')
{
// test code
}
})
})
});
});
I didn't find the way to loop the children data .
Any help would be greatly appreciated
Should be something like:
const objects = Object.keys(data).map(key => data[key]);
I have json
{
"file1": [{
"username": "myname",
"groupname": "mypassword",
"environment": [{
"name": "UMASK",
"value": "022"
},
{
"name": "DEBUG",
"value": "2"
}]
}]
}
and want to change the value of DEBUG to 5.
Tried with below command
jq .file1[0].environment sandeep.json |jq '(.[] |select(.name ==
"DEBUG") | .value) |= "5"'
this will return me specific portion of json like
[
{
"name": "UMASK",
"value": "022"
},
{
"name": "DEBUG",
"value": "5"
}
]
but I want to see full json with changed value
{
"file1": [{
"username": "myname",
"groupname": "mypassword",
"environment": [{
"name": "UMASK",
"value": "022"
},
{
"name": "DEBUG",
"value": "5"
}]
}]
}
Please suggest me
It should be:
jq '(.file1[].environment[]|select(.name=="DEBUG").value) |= 5' file.json
Output:
{
"file1": [
{
"username": "myname",
"groupname": "mypassword",
"environment": [
{
"name": "UMASK",
"value": "022"
},
{
"name": "DEBUG",
"value": 5
}
]
}
]
}