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use serde::{Deserialize, Serialize};
use crate::decode::Decode;
use crate::encode::{Encode, IsNull};
use crate::error::BoxDynError;
use crate::mysql::protocol::text::ColumnType;
use crate::mysql::{MySql, MySqlTypeInfo, MySqlValueRef};
use crate::types::{Json, Type};
impl<T> Type<MySql> for Json<T> {
fn type_info() -> MySqlTypeInfo {
MySqlTypeInfo::binary(ColumnType::String)
}
fn compatible(ty: &MySqlTypeInfo) -> bool {
ty.r#type == ColumnType::Json
|| <&str as Type<MySql>>::compatible(ty)
|| <&[u8] as Type<MySql>>::compatible(ty)
}
}
impl<T> Encode<'_, MySql> for Json<T>
where
T: Serialize,
{
fn encode_by_ref(&self, buf: &mut Vec<u8>) -> IsNull {
let json_string_value =
serde_json::to_string(&self.0).expect("serde_json failed to convert to string");
<&str as Encode<MySql>>::encode(json_string_value.as_str(), buf)
}
}
impl<'r, T> Decode<'r, MySql> for Json<T>
where
T: 'r + Deserialize<'r>,
{
fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError> {
let string_value = <&str as Decode<MySql>>::decode(value)?;
serde_json::from_str(&string_value)
.map(Json)
.map_err(Into::into)
}
}