Array of objects

[mapicard]

Hi,
Is it possible to implement an array of objects with this library? If so, could you provide an example of implementing the following

{
  "movies": [
    { "title": "Raiders of the Lost Ark", "director": "Ridley Scott"},
    { "title": "Ghostbusters", "director": "Steven Spielberg"}
  ]
}

Thank you

[manchoz]

Hi @mapicard,
Here is a possible implementation.

Try it on NestedJson.

#include <Arduino_JSON.h>

struct Movie {
  String title;
  String director;
};

Movie movies[] {
  { "Raiders of the Lost Ark", "Ridley Scott" },
  { "Ghostbusters", "Steven Spielberg" },
  { "THX 1138", "George Lucas" }
};

void setup()
{
  Serial.begin(9600);
  // Wait for Serial or start after 2.5 seconds
  for (auto startNow = millis() + 2500; !Serial && millis() < startNow; delay(500));

  // The JSON variable to host the JSON array for the movies
  JSONVar jsonMovies;
  
  // A simple index to iterate on while creating the JSON array
  int idx { 0 };
  
  // Iterate on movies
  for (const auto& m : movies) {
    // The JSON dictionary hosting the single movie element
    JSONVar jm;
    jm["title"] = m.title;
    jm["director"] = m.director;
    
    // Add the movie to the array
    jsonMovies[idx] = jm;
    idx++;
  }

  // The JSON variable hosting the root of the JSON
  JSONVar jsonRoot;
  // Add the movies array to the "movies" key
  jsonRoot["movies"] = jsonMovies;

  auto jsonString = JSON.stringify(jsonRoot);
  Serial.println(jsonString);
}

void loop()
{
  
}