Codegen PostgreSQL timestamp column maps to NaiveDateTime in Rust

[billy1624]

PR Info

• Closes Postgres timestamp column type #586

• Dependencies:

  • PostgreSQL datetime and timestamp datatype are equivalent sea-schema#69

With following table schema:

create table satellite
(
    id              serial primary key,
    satellite_name  varchar                                                                             not null,
    launch_date     timestamp                not null,
    deployment_date timestamp with time zone not null
);

The generated SeaORM model would be:

#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
#[sea_orm(table_name = "satellite")]
pub struct Model {
    #[sea_orm(primary_key)]
    pub id: i32,
    pub satellite_name: String,
    pub launch_date: DateTime,
    pub deployment_date: DateTimeWithTimeZone,
}

We still have one problem to solve. Model field defined in DateTime is assumed to be of ColumnType::DateTime instead of ColumnType::Timestamp.

sea-orm/sea-orm-macros/src/derives/entity_model.rs

Lines 256 to 258 in 183639d

	"DateTime" | "NaiveDateTime" => {
	quote! { DateTime }
	}

I think we can still merge this but we need to clearly mention this compatibility issue on SeaORM docs. @tyt2y3

[tyt2y3]

This will be addressed by upgrading sea-schema to 0.9

[tyt2y3]

Docs welcomed on another PR though