creating a nested json string with jq

creating a nested json string with jq

By : user3040515
Date : November 26 2020, 06:23 AM
seems to work fine How can I create the below json with jq? , I was able to create the jq json using the command listed below -
code :
redrive_policy=$(jq -n --arg arn "$dlq_arn" --arg max "$max_count" '{RedrivePolicy:{deadLetterTargetArn: $arn,maxReceiveCount: $max}}')

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Get String from json with nested json object and nested json arrays with multiple json object, in Android

Get String from json with nested json object and nested json arrays with multiple json object, in Android

By : Suntae Kim
Date : March 29 2020, 07:55 AM
this one helps. I need to access as String all the single parameters contained in a complex Json. , I've not tried. But i guess it may work.
code :
    JSONObject obj = new JSONObject(jsonString);
    String id = obj.getString("id");
    String error = obj.getString("error");
    JSONObject result = obj.getJSONObject("result");
    int nPeople = result.getInt("nPeople");
    JSONArray people = result.getJSONArray("people");
    for(int i = 0 ; i < people.length() ; i++){
        JSONObject p = (JSONObject)people.get(i);
        String namePeople = p.getString("namePeople");
creating nested json string android

creating nested json string android

By : Jay
Date : March 29 2020, 07:55 AM
like below fixes the issue You could just pass the desired JSON String to the JSONObject constructor to do the job. Take a look here
Rails nested attributes are not creating an object from JSON string inside a hidden form input

Rails nested attributes are not creating an object from JSON string inside a hidden form input

By : user2604046
Date : March 29 2020, 07:55 AM
hop of those help? Problem
The error you are receiving AssociationTypeMismatch is caused by putting origin: and destination: in your strong_params. Rails thinks you are trying to associate objects much like you would do @post.comment = @comment.
code :
# Not deserialized
@package.origin = '{ \"address\":\"Kimmage, Dulbin, Ireland\", ... }'

# Deserialized. However, this still won't work.
@package.origin = { address: "Kimmage, Dublin, Ireland", ...}
$ rails c

irb(main): p = Package.new
irb(main): p.destination = { address: "Kimmage, Dublin, Ireland" } # => Throws ActiveRecord::AssociationTypeMismatch.
params.require(:package).permit(:width, :length, :height, :whatever_else, :origin_id, :location_id)
class PackagesController < ApplicationController
  before_action :set_origin, only: [:create]
  before_action :set_destination, only: [:create]

  def create
    @package = current_user.packages.build(package_params)
    @package.destination = @destination
    @package.origin = @origin
    if @package.save
      # Do whatever you need
      # Do whatever you need

  # Create the package like you normally would
  def package_params
    params.require(:package).permit( :state, :delivery_date, :length, :height, :width, :weight)

  def set_origin
    # You can use Location.create if you don't need to find a previously stored origin
    @origin = Location.find_or_create_by(
      address: params[:package][:origin][:address],
      lat: params[:package][:origin][:lat],
      lng: params[:package][:origin][:lng],

  def set_destination
    # You can use Location.create if you don't need to find a previously stored destination
    @destination = Location.find_or_create_by(
      address: params[:package][:destination][:address],
      lat: params[:package][:destination][:lat],
      lng: params[:package][:destination][:lng],
class Package < ActiveRecord::Base
  validates :origin, presence: true
  validates :destination, presence: true

  validates_associated :origin, :destination
How can I prevent nested JSON, by e.g. transforming the nested objects to a JSON string in the JSON?

How can I prevent nested JSON, by e.g. transforming the nested objects to a JSON string in the JSON?

By : Vivek Raheja
Date : March 29 2020, 07:55 AM
will be helpful for those in need I understand the problem is not so much about writing a List to a string, but more about a way to create JSON with only two levels of depth - having everything beyond that a string.
I don't think an IContractResolver would work for this, you should implement a JsonConverter instead. The basic idea would be that it iterates over your object's children, then over their children, checking their type. If they're an array or an object - it would replace them with a serialized string.
code :
class TwoDepthJsonConverter : JsonConverter
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        var jo = JObject.FromObject(value);
        foreach (var property in jo)
            foreach (var parameter in property.Value)
                var paramVal = parameter.First;
                if (paramVal.Type == JTokenType.Array || paramVal.Type == JTokenType.Object)

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        return JToken.ReadFrom(reader).ToObject(objectType);

    public override bool CanConvert(Type objectType)
        return true;
Thing thing = new Thing();
thing.Parameters["counting"] = new List<int> { 1, 2, 3 };
thing.Parameters["name"] = "Numbers";
thing.Parameters["size"] = 3;

string result = JsonConvert.SerializeObject(thing, Formatting.Indented, new TwoDepthJsonConverter());

// Results:
// {
//   "Parameters": {
//     "counting": "[1,2,3]",
//     "name": "Numbers",
//     "size": 3
//   }
// }
Creating nested JSON string using nsmutabledictionary

Creating nested JSON string using nsmutabledictionary

By : Beril Başak Tukaç
Date : March 29 2020, 07:55 AM
may help you . I'm trying to create a json string of the below format: , If you want this the best way is create more dictionary example:
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