fix: array type serialization (#194)

src/types/mod.rs

@@ -4,7 +4,7 @@ use std::{error::Error, fmt};
 use bytes::{BufMut, BytesMut};
 use chrono::offset::Utc;
 use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, TimeZone};
-use postgres_types::{IsNull, Type, WrongType};
+use postgres_types::{IsNull, Kind, Type, WrongType};
 use rust_decimal::Decimal;
 
 pub trait ToSqlText: fmt::Debug {
@@ -246,6 +246,11 @@ impl<T: ToSqlText> ToSqlText for &[T] {
  ty: &Type,
  out: &mut BytesMut,
  ) -> Result<IsNull, Box<dyn Error + Sync + Send>> {
+ let ty = match ty.kind() {
+ Kind::Array(inner_ty) => inner_ty,
+ _ => ty,
+ };
+
  out.put_slice(b"{");
  for (i, val) in self.iter().enumerate() {
  if i > 0 {
@@ -325,4 +330,18 @@ mod test {
  no.to_sql_text(&Type::BOOL, &mut buf).unwrap();
  assert_eq!("f", String::from_utf8_lossy(buf.freeze().as_ref()));
  }
+
+ #[test]
+ fn test_array() {
+ let date = &[
+ NaiveDate::from_ymd_opt(2023, 3, 5).unwrap(),
+ NaiveDate::from_ymd_opt(2023, 3, 6).unwrap(),
+ ];
+ let mut buf = BytesMut::new();
+ date.to_sql_text(&Type::DATE_ARRAY, &mut buf).unwrap();
+ assert_eq!(
+ "{2023-03-05,2023-03-06}",
+ String::from_utf8_lossy(buf.freeze().as_ref())
+ );
+ }
 }