Mixing Static Dynamic JSON

TODO: collapasable, copyable, download, etc

In Rust when using serde_json, can I have a mixture of statically typed and dynamically typed objects?Yes, in Rust, you can have a mixture of statically typed and dynamically typed objects when using the serde_json crate. You can use the serde_json::Value type to represent a dynamically typed JSON value, while using structs to represent statically typed data.

Here's an example demonstrating the use of both statically typed and dynamically typed objects with serde_json:

use serde_json::{Result, Value};
use serde::{Deserialize, Serialize};

// Statically typed struct
#[derive(Serialize, Deserialize, Debug)]
struct Person {
    name: String,
    age: u32,
}

fn main() -> Result<()> {
    let static_data = r#"
        {
            "name": "Alice",
            "age": 30
        }
    "#;

    let dynamic_data = r#"
        {
            "hobbies": ["reading", "swimming"],
            "address": {
                "city": "New York",
                "state": "NY"
            }
        }
    "#;

    // Deserialize static data into a Person struct
    let person: Person = serde_json::from_str(static_data)?;

    // Deserialize dynamic data into a serde_json::Value
    let value: Value = serde_json::from_str(dynamic_data)?;

    println!("Statically typed data: {:?}", person);
    println!("Dynamically typed data: {:?}", value);

    Ok(())
}

In this example, we have a statically typed Person struct representing a person's name and age. We also have a dynamically typed JSON object containing the person's hobbies and address, represented by a serde_json::Value.

We deserialize the static data into a Person struct, while the dynamic data is deserialized into a serde_json::Value. This way, we can work with both statically typed and dynamically typed JSON objects using serde_json.I mean, what if the Person struct had a member metadata: Value, would that work? So that JSON like this could be consumed:

{ "name": "Alice", "age": 30, "metadata": { "hobbies" ... }Yes, you can have a serde_json::Value as a member of a struct to represent a part of the JSON data with a dynamic type. Here's an example:

use serde_json::{Result, Value};
use serde::{Deserialize, Serialize};

// Statically typed struct with a dynamically typed field (metadata)
#[derive(Serialize, Deserialize, Debug)]
struct Person {
    name: String,
    age: u32,
    metadata: Value,
}

fn main() -> Result<()> {
    let data = r#"
        {
            "name": "Alice",
            "age": 30,
            "metadata": {
                "hobbies": ["reading", "swimming"],
                "address": {
                    "city": "New York",
                    "state": "NY"
                }
            }
        }
    "#;

    // Deserialize the data into a Person struct
    let person: Person = serde_json::from_str(data)?;

    println!("Person: {:?}", person);

    Ok(())
}

In this example, the Person struct has a metadata field of type serde_json::Value. This allows you to have a mixture of statically typed and dynamically typed JSON data within a single struct. The metadata field will store the dynamic JSON data, allowing you to deserialize and work with JSON objects that have a combination of static and dynamic types.

Mixing Static Dynamic JSON created at Tue Jan 20 1970 10:34:33 GMT+0000 (Coordinated Universal Time)