Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.
Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.
Questions tagged [serde]
839 questions
23
votes
3 answers
How do I use Serde to (de)serialize arrays greater than 32 elements, such as [u8; 128]?
I have a struct containing a byte array that I would like to serialize and deserialize to and from binary, but it only works for arrays up to 32 elements.
Here is my minimal example code
main.rs:
#[macro_use]
extern crate serde_derive;
extern crate…
Tobias Hermann
- 9,936
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- 134
23
votes
1 answer
"invalid type: map, expected a sequence" when deserializing a nested JSON structure with Serde
I am trying to poll the GitHub API for issues and print them out. To do so, I need to deserialize a nested JSON structure that I receive from a cURL GET request.
I am trying to get the url for all the objects in the items array:
{
"total_count":…
zep
- 271
- 1
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22
votes
1 answer
How to pass an array of objects to WebAssembly and convert it to a vector of structs with wasm-bindgen?
It's possible to pass an array of integers like this:
const js = import("./webassembly_rust");
let array_nums = [1,2,3,4,5,6,7,8,9];
js.then(js => {
js.test( array_nums );
});
to WebAssembly and save it in a vector like this:
extern crate…
Gregor
- 331
- 2
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22
votes
1 answer
Rust & Serde JSON deserialization examples?
I'm trying to figure out how to deserialize JSON into a structure using Serde. For instance, the example JSON on serde_json's own documentation contains the following data:
{
"FirstName": "John",
"LastName": "Doe",
"Age": 43,
…
vegai
- 330
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20
votes
1 answer
How do I resolve "implementation of serde::Deserialize is not general enough" with actix-web's Json type?
I'm writing a server using actix-web:
use actix_web::{post, web, Responder};
use serde::Deserialize;
#[derive(Deserialize)]
struct UserModel<'a, 'b> {
username: &'a str,
password: &'b str,
}
#[post("/")]
pub fn register(user_model:…
thesdev
- 798
- 9
- 15
19
votes
3 answers
How to implement `serde::Serialize` for a boxed trait object?
I ran into a problem trying to create a generic vector for a struct.
This was my first attempt:
#[derive(Serialize)]
struct Card {
sections: Vec>
}
#[derive(Serialize)]
struct Section {
header:…
snowbane
- 245
- 1
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- 10
19
votes
3 answers
How can deserialization of polymorphic trait objects be added in Rust if at all?
I'm trying to solve the problem of serializing and deserializing Box. I know that in the case of a closed type hierarchy, the recommended way is to use an enum and there are no issues with their serialization, but in my case using enums…
Dmitry Gordon
- 2,229
- 12
- 20
18
votes
2 answers
How to decode JSON object with Rust keyword attribute name?
I was wondering if it is possible to decode a JSON object in Rust that has an attribute name which is also a Rust keyword. I am working with the rustc-serialize crate and my struct definition looks like this:
#[derive(RustcDecodable)]
struct MyObj…
rking788
- 431
- 1
- 5
- 12
17
votes
3 answers
How to unit-test a deserialization function used in serde(deserialize_with)?
I have a struct which implements Deserialize and uses the serde(deserialize_with) on a field:
#[derive(Debug, Deserialize)]
struct Record {
name: String,
#[serde(deserialize_with = "deserialize_numeric_bool")]
is_active: bool,
}
The…
pixunil
- 641
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16
votes
3 answers
Convert two types into a single type with Serde
I'm writing for a program that hooks into a web service which sends back JSON.
When a certain property isn't there it provides a empty object, with all its fields as empty strings instead of excluding the value. When the property exists, some of the…
XAMPPRocky
- 3,160
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- 45
15
votes
4 answers
Using `serde::Serialize` with `Option`
When trying to serialize Option> I'm encountering an error:
error[E0308]: mismatched types
--> src/main.rs:39:14
|
39 | #[derive(Serialize, Debug)]
| ^^^^^^^^^ expected struct `DateTime`, found enum…
Jonathan Woollett-light
- 2,813
- 5
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- 58
15
votes
1 answer
Rust Diesel: the trait bound `NaiveDateTime: Deserialize<'_>` is not satisfied
I am new to rust and diesel. And trying to create a small demo api using rocket framework.
Getting error: the trait bound NaiveDateTime: Deserialize<'_> is not satisfied
I googled and found some useful links like here :…
Shaksham Singh
- 491
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- 19
15
votes
2 answers
How to handle potentially missing fields using serde_json and the Value enum?
I have a data stream of JSON where some JSON objects may be missing certain fields or have fields I am unaware of in advance.
My solution is to use:
let v: Value = serde_json::from_str(data)?;
How do I handle accessing the field stuff? If I know…
James Smith
- 249
- 1
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- 8
15
votes
2 answers
How to use a custom serde deserializer for chrono timestamps?
I'm trying to parse JSON into a struct which has a chrono::DateTime field. The JSON has the timestamps saved in a custom format that I wrote a deserializer for.
How do I connect the two and get it working using #[serde(deserialize_with)]?
I'm using…
Emre
- 503
- 4
- 7
14
votes
1 answer
How can I use serde to serialize a struct to another Rust data structure?
I have a data structure Document, which I would like to serialize other Rust structs to. It is basically a HashMap for the fields internally, however it interacts with a database API, so I will definitely want to convert other types into those…
stimulate
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