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#![cfg(feature = "derive")]
use schemars::schema::{Schema, SchemaObject};
use schemars::{r#gen::SchemaGenerator, schema_for, JsonSchema};
use serde::{Deserialize, Serialize};
// `int_as_string` and `bool_as_string` use the schema for `String`.
#[derive(Default, Deserialize, Serialize, JsonSchema)]
pub struct MyStruct {
#[serde(default = "eight", with = "as_string")]
#[schemars(with = "String")]
pub int_as_string: i32,
#[serde(default = "eight")]
pub int_normal: i32,
#[serde(default, with = "as_string")]
#[schemars(schema_with = "make_custom_schema")]
pub bool_as_string: bool,
#[serde(default)]
pub bool_normal: bool,
}
fn make_custom_schema(generator: &mut SchemaGenerator) -> Schema {
let mut schema: SchemaObject = <String>::json_schema(generator).into();
schema.format = Some("boolean".to_owned());
schema.into()
}
fn eight() -> i32 {
8
}
// This module serializes values as strings
mod as_string {
use serde::{de::Error, Deserialize, Deserializer, Serializer};
pub fn serialize<T, S>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
where
T: std::fmt::Display,
S: Serializer,
{
serializer.collect_str(value)
}
pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
where
T: std::str::FromStr,
D: Deserializer<'de>,
{
let string = String::deserialize(deserializer)?;
string
.parse()
.map_err(|_| D::Error::custom("Input was not valid"))
}
}
fn main() {
let schema = schema_for!(MyStruct);
println!("{}", serde_json::to_string_pretty(&schema).unwrap());
}
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