Rust

Find and Delete Object from JSON Array

See more JSON Examples

Demonstrates how to find an delete an object from a JSON array of objects. Rust

// This example will delete the "Pasta" category object from Menu B.

// {
//   "menus": [
//     {
//       "name": "Menu A",
//       "categories": [
// 			{
// 			"name": "Kebabs",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Burgers",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Pasta",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Appetizers",
// 			"description": "blah blah blah"
// 			}
// 		]
// 	},
//     {
//       "name": "Menu B",
//       "categories": [
// 			{
// 			"name": "Kebabs",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Burgers",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Pasta",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Appetizers",
// 			"description": "blah blah blah"
// 			}
// 		]
// 	  }
// 	]
// }

let json = chilkat::JsonObject::new();
if json.load_file("qa_data/json/menus.json").is_err() {
    println!("{}", json.last_error_text());
    return;
}

// Find Menu B.
let menu = json.find_record("menus", "name", "Menu B", true).unwrap();
// assume menu is found..

// Get the categories array, and then find the index of the "Pasta" menu category.
let cat_arr = menu.array_of("categories").unwrap();
// Assume it is found..

// Find the object where the name of the JSON member is "name", and the value is "Pasta"
let index = cat_arr.find_object("name", "Pasta", true);
if index < 0 {
    println!("Pasta not found.");
} else {

    // Delete the "Pasta" category record from Menu B
    let _ = cat_arr.delete_at(index).is_ok();
    // Assume OK..
}

// Examine the JSON to see if it worked as expected..
json.set_emit_compact(false);
println!("{}", json.emit().unwrap_or_default());