rename

serde_json/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "serde-json-test"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+chrono = "0.4.10"

serde_json/src/main.rs

@@ -0,0 +1,80 @@
+#[macro_use]
+extern crate serde_json;
+
+use serde::{Deserialize, Serialize};
+use serde_json::{Result, Value};
+use chrono::{DateTime, Utc, TimeZone};
+
+mod my_date_format {
+    use chrono::{DateTime, Utc, TimeZone};
+    use serde::{self, Deserialize, Serializer, Deserializer};
+
+    const FORMAT: &'static str = "%Y-%m-%d %H:%M:%S";
+
+    pub fn serialize<S>(date: &DateTime<Utc>, serializer: S ) -> Result<S::Ok, S::Error> where S: Serializer {
+        let s = format!("{}", date.format(FORMAT));
+        serializer.serialize_str(&s)
+    }
+
+    pub fn deserialize<'de, D>(deserializer: D ) -> Result<DateTime<Utc>, D::Error> where D: Deserializer<'de> {
+        let s = String::deserialize(deserializer)?;
+        Utc.datetime_from_str(&s, FORMAT).map_err(serde::de::Error::custom)
+    }
+}
+
+// https://serde.rs/container-attrs.html
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+enum TestEnum {
+
+    #[serde(rename = "A")]
+    TypeA,
+
+    #[serde(rename = "B")]
+    TypeB,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+struct TestStruct {
+    ty: TestEnum,
+    #[serde(with = "my_date_format")]
+    timestamp: DateTime<Utc>,
+}
+
+fn main() -> Result<()> {
+    let serialized = serde_json::to_string(&TestStruct{
+        ty: TestEnum::TypeA,
+        timestamp: Utc.datetime_from_str("2020-01-28 17:04:00", "%Y-%m-%d %H:%M:%S").map_err(serde::de::Error::custom)?,
+    })?;
+
+    println!("{}", serialized);
+
+    let data = r#"
+        {
+            "name": "John Doe",
+            "age": 43,
+            "phones": [
+                "+44 1234567",
+                "+44 2345678"
+            ]
+        }"#;
+    let v: Value = serde_json::from_str(data)?;
+    println!("{}", v);
+
+    let mut john = json!({
+        "name": "John Doe",
+        "age": 43,
+        "phones": [
+            "+44 1234567",
+            "+44 2345678"
+        ]
+    });
+    println!("{}", &john);
+
+    if let Option::Some(ref mut m) = john.as_object_mut() {
+        m.insert("test".into(), Value::Bool(true));
+        m.insert("test2".into(), Value::String("hello world".into()));
+    }
+    println!("{}", john);
+
+    Ok(())
+}