repo_description: Tantivy is a full-text search engine library inspired by Apache Lucene and written in Rust
repo_topics: rust search-engine
code: use time::format_description::well_known::Rfc3339;
  use time::OffsetDateTime;
  
  use crate::TantivyError;
  
  pub(crate) fn format_date(val: i64) -> crate::Result<String> {
      let datetime = OffsetDateTime::from_unix_timestamp_nanos(val as i128).map_err(|err| {
          TantivyError::InvalidArgument(format!(
              "Could not convert {val:?} to OffsetDateTime, err {err:?}"
          ))
      })?;
      let key_as_string = datetime
          .format(&Rfc3339)
          .map_err(|_err| TantivyError::InvalidArgument("Could not serialize date".to_string()))?;
      Ok(key_as_string)
  }
  