Codegen Handle Self Referencing & Multiple Relations to the Same Related Entity

[billy1624]

PR Info

• Resolve [sea-orm-cli] Better handling of relation generations #239

[AngelOnFira]

I took a quick read through the code, but not a deep dive yet. I'll try doing some exports on my databases when I get time, and see what comes up. Super excited to see this!

[billy1624]

I took a quick read through the code, but not a deep dive yet. I'll try doing some exports on my databases when I get time, and see what comes up. Super excited to see this!

Do let us know the test results :P
Thanks!!

[tyt2y3]

TBH, I did not author codegen. Way more complicated than I thought. Seems cool enough though.

[AngelOnFira]

Alright, I loaded in my database, and it seems to cargo check properly. I will have to play with the ergonomics of using it, but this is very promising! Thanks for the work 😃

Here is a model with two fields that reference a wallet (some code was removed):

//! SeaORM Entity. Generated by sea-orm-codegen 0.4.0

use sea_orm::entity::prelude::*;

#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
#[sea_orm(table_name = "currencies_transaction")]
pub struct Model {
    #[sea_orm(primary_key)]
    pub id: i64,
    pub amount: Option<i32>,
    pub from_wallet_id: Option<i64>,
    pub to_wallet_id: Option<i64>,
}

#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
pub enum Relation {
    #[sea_orm(
        belongs_to = "super::currencies_wallet::Entity",
        from = "Column::FromWalletId",
        to = "super::currencies_wallet::Column::Id",
        on_update = "NoAction",
        on_delete = "NoAction"
    )]
    CurrenciesWallet2,
    #[sea_orm(
        belongs_to = "super::currencies_wallet::Entity",
        from = "Column::ToWalletId",
        to = "super::currencies_wallet::Column::Id",
        on_update = "NoAction",
        on_delete = "NoAction"
    )]
    CurrenciesWallet1,
}

impl Related<super::currencies_trade_transactions::Entity> for Entity {
    fn to() -> RelationDef {
        Relation::CurrenciesTradeTransactions.def()
    }
}

impl ActiveModelBehavior for ActiveModel {}

[billy1624]

Nice!!