I am trying to loop through an array using find to find and return a specific id.
This is my structure:
{
"employees": [
{
"emp_id": "1",
"tutorials": [
{
"id": "test1"
},
{
"id": "test2"
},
{
"id": "test3"
},
{
"id": "test4"
},
{
"id": "test5"
}
]
}
]
}
So basically I am trying to see if the above structure contains a tutorial id of 'test3' and return it.(i.e return 'test3' in this case)
I can get the desired result using a combination of map and find like this:
my_tutorial = employees.map { |employee|
employee.tutorials.find { |tutorial|
tutorial.id == 'test3'
}
}.first
my_tutorial
But I want to know if there is a better way using find . I tried the following but it returns the ruby object instead of the id.
employees.find { |employee|
employee.tutorials.find { |tutorial|
tutorial.id == 'test3'
}
}
Here is what i did to make it work using find. Not sure if it is any better:
my_id = employees.find { |employee|
employee.tutorials.find { |tutorial|
tutorial.id == 'test3'
}
}
my_id.tutorials.first.id
If you have to get only the first record do as follows:
employees[0].tutorials.detect {|r| r.id == 'test3' }
Related
I have Customer collection on MongoDB. With status field. Which can have the same Id fields.
And I need find first changed value like 'Guest' and push it Id's to specific pipeline named as 'guests'.
And customers with status 'Member' I need push tu another pipeline named as 'members' who Id'd equal Id's from aggregation pipeline 'guests'.
This is done in order to obtain the quantity elements in 'guests' and 'members'.
Its member item:
{"_id"=>{"$oid"=>"5ce2ecb3ad71852e7fa9e73f"},
"status"=>"member",
"duration"=>nil,
"is_deleted"=>false,
"customer_id"=>"17601",
"customer_journal_item_id"=>"62769",
"customer_ids"=>"17601",
"customer_journal_item_ids"=>"62769",
"self_customer_status_id"=>"21078",
"self_customer_status_created_at"=>"2017-02-01T00:00:00.000Z",
"self_customer_status_updated_at"=>"2017-02-01T00:00:00.000Z",
"updated_at"=>"2019-05-20T18:06:43.655Z",
"created_at"=>"2019-05-20T18:06:43.655Z"}}
My aggregation
{
'$sort': {'self_customer_status_created_at': 1}
},
{'$match':
{
'self_customer_status_created_at':
{
"$gte": Time.parse('2017-01-17').beginning_of_month,
"$lte": Time.parse('2017-01-17').end_of_month
}
}
},
{
"$facet": {
"guests":
[
{
"$group": {
"_id": "$_id",
"data": {
'$first': '$$ROOT'
}
}
},
{
"$match": {
"data.status": "guest"
}
}, {
"$group": {
"_id":nil,
"array":{
"$push": "$data.self_customer_status_id"
}
}
},
{
"$project":{
"array": 1,
"_id":0
}
}
], "members":
[
{
"$group": {
"_id": "$_id", "data": {
'$last': '$$ROOT'
}
}
},
{
"$match": {
"data.status": "member",
"data.self_customer_status_id": {
"$in": [
"$guests.array"
]
}
}
}
}
]
}
}, {
"$project":
{
"members": 1,
"guests.array": 1
}
}
]
).as_json
Instead "guests.array" array? I have error:
Mongo::Error::OperationFailure: $in needs an array (2)
What am I doing wrong?
Sorry my English!
second expression in faced doesnt seen first expression
need delete
,
"data.self_customer_status_id": {
"$in": {
"$arrayElemAt":
[
"$guests.array",
0
]
}
}
{"$match": {"data.self_customer_status_id": { "$in": ["guests.array"] } } }
```
this link paste before $project
I have following two array of hashes. I am trying to remove the record from doctor array hash whose doctor_patient_id doesnt not exist in doctor_patient_id array of patient_and_doctor array of hash.
doctor = [
{ :doctor_patient_id=>"abc",
:doctor_id=>"d1"
},
{ :doctor_patient_id=>"def",
:doctor_id=>"d2"
},
{ :doctor_patient_id=>"ghi",
:doctor_id=>"d3"
}
]
patient_and_doctor = [
{ :patient_id=>"11e8f37477ab7028a66b210b9699def9",
:doctor_patient_id=>[ "def", "zkj", "cps" ]
},
{ :patient_id=>"11e8f37481fabfe68630f5da2e22dceb",
:doctor_patient_id=>[ "uio", "ghi", "jkk" ]
}
]
expected output is:
doctor = [
{ :doctor_patient_id=>"def",
:doctor_id=>”d2”
},
{ :doctor_patient_id=>"ghi",
:doctor_id=>”d3”
}
]
I tried to do something like below but no luck,
patient_and_doctor.each do |dp|
data = doctor.map {|d| d[:doctor_patient_id].include?
dp[:doctor_patient_id] }
end
How can i achieve this?
valid_ids = patient_and_doctor.flat_map { |h| h[:doctor_patient_id] }
# => ["def", "zkj", "cps", "uio", "ghi", "jkk"]
doctor.select { |h| valid_ids.include? h[:doctor_patient_id] }
# => [{:doctor_patient_id=>"def", :doctor_id=>"d2"},
# {:doctor_patient_id=>"ghi", :doctor_id=>"d3"}]
use select! instead of select if you wish to mutate your doctor array instead of returning a new one.
Following can get required answer,
doctor.select { |x| patient_and_doctor.map { |x| x[:doctor_patient_id] }.flatten.include?(x[:doctor_patient_id]) }
I search around here and little example to show how to search a json element in SwiftyJSON. I have below json structure, can anyone tech me? thanks.
var jsonData = {
"css":[
{
"path": "style.css",
"updated": "12432"
},
{
"path": "base.css",
"updated": "34627"
}
],
"html":[
{
"path": "home.htm",
"updated": "3223"
},
{
"path": "about",
"updated": "3987"
}
]
}
I want to search the "html" -> "home.htm" row. How to make use of filter method for it.
I got example like this for simple json structure, but in my case I have no idea.
{
countryid : "1"
name : "New York"
},
{
countryid : "2"
name : "Sydeny"
}
if let array = arrCountry.arrayObject as? [[String:String]],
foundItem = array.filter({ $0["name"] == "def"}).first {
print(foundItem)
}
let updated = json["html"].array?.filter { $0["path"].string == "home.htm" }.first?["updated"].string
print(updated)
// OR
for subJson in json["html"].arrayValue where subJson["path"].stringValue == "home.htm" {
let updated = subJson["updated"].stringValue
print(updated)
}
I’ve got a question I can’t seemingly resolve on my own.
Together with basic Query, Mutation and so on types I’ve made the following type definition:
module Types
UserType = GraphQL::ObjectType.define do
name 'User'
description 'A user'
implements GraphQL::Relay::Node.interface
global_id_field :id
field :email, !types.String, 'Email address'
connection :docs, DocType.connection_type, 'Available docs'
end
end
And I then try to query it with:
query FileListQuery(
$after: String
$first: Int
) {
viewer {
currentUser {
docs(first: $first, after: $after) {
edges {
node {
id
name
__typename
}
cursor
}
pageInfo {
endCursor
hasNextPage
hasPreviousPage
startCursor
}
}
id
}
id
}
}
And I pass the following as query variables:
{
"first": 1,
"after": null
}
The problem is it bails out with the following:
{
"errors": [
{
"message": "Int isn't a defined input type (on $first)",
"locations": [
{
"line": 3,
"column": 3
}
],
"fields": [
"query FileListQuery"
]
}
]
}
I honestly have no clue why it complains about the Int type…
If I get rid of the problematic $first query variable in the request, it works fine.
This:
query FileListQuery(
$after: String
) {
viewer {
currentUser {
docs(first: 10, after: $after) {
edges {
node {
id
name
__typename
}
cursor
}
pageInfo {
endCursor
hasNextPage
hasPreviousPage
startCursor
}
}
id
}
id
}
}
Produces this:
{
"data": {
"viewer": {
"currentUser": {
"docs": {
"edges": [
{
"node": {
"id": "1",
"name": "First Doc",
"__typename": "Doc"
},
"cursor": "MQ=="
}
],
"pageInfo": {
"endCursor": "MQ==",
"hasNextPage": false,
"hasPreviousPage": false,
"startCursor": "MQ=="
}
},
"id": "1"
},
"id": "VIEWER"
}
}
}
Any hints, ideas on how to fix this? I use the graphql gem v1.6.3.
Currently, there seems to be a bug in graphql-ruby that prevents types not explicitly used in a schema from being propagated. Check out this issue on GitHub: https://github.com/rmosolgo/graphql-ruby/issues/788#issuecomment-308996229
To fix the error one has to include an Int field somewhere in the schema. Turns out I haven't had one. Yikes.
This fixed it for me:
# Make sure Int is included in the schema:
field :testInt, types.Int
Below is json I translated from ruby hash for ease of representation for this question using hash.to_json. Notice how the key range is being repeated since the values in the nested doc are different. How do I merge the ranges so that for the weight key both "gt": 2232, "lt": 4444 fall under the one hash key weight inside range. Is there some union or collapse method in ruby to sort of "compactify" hashes?
{
"must": [
{
"match": {
"status_type": "good"
}
},
{
"range": {
"created_date": {
"lte": 43252
}
}
},
{
"range": {
"created_date": {
"gt": "42323"
}
}
},
{
"range": {
"created_date": {
"gte": 523432
}
}
},
{
"range": {
"weight": {
"gt": 2232
}
}
},
{
"range": {
"weight": {
"lt": 4444
}
}
}
],
"should": [
{
"match": {
"product_age": "old"
}
}
]
}
Want to change the above to this:
{
"must": [
{
"range": {
"created_date": {
"gte": 523432,
"gt": "42323"
}
}
},
{
"range": {
"weight": {
"gt": 2232,
"lt": 4444
}
}
}
],
"should": [
{
"match": {
"product_age": "old"
}
}
]
}
I don't know of a built in way to handle something like this, but you could write a method that does something like this:
def collapse(array, key)
# Get only the hashes with :range
to_collapse = array.select { |elem| elem.has_key? key }
uncollapsed = array - to_collapse
# Get the hashes that :range points to
to_collapse = to_collapse.map { |elem| elem.values }.flatten
collapsed = {}
# Iterate through each range hash and their subsequent subhashes.
# Collapse the values into the collapsed hash as necessary
to_collapse.each do |elem|
elem.each do |k, v|
collapsed[k] = {} unless collapsed.has_key? k
v.each do |inner_key, inner_val|
collapsed[k][inner_key] = inner_val
end
end
end
[uncollapsed, collapsed].flatten
end
hash[:must] = collapse hash[:must], :range
Note that this is a specific solution that's mainly applicable to the presented problem. It only works for the hash/array depths specified here. You could probably write a recursive solution that could potentially work at any level of depth with a bit more work.