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b/rasql-traits/src/async.rs new file mode 100644 index 0000000..7b7dc62 --- /dev/null +++ b/rasql-traits/src/async.rs @@ -0,0 +1,136 @@ +use crate::DbTraits; + +pub trait Client { + type Traits: DbTraits; + + + type PrepareError; + type PreparedStatement; + + type Rows; + type Row; + + type RowReadColumnError; + + type QueryError; + type InsertOutcome; + type InsertError; + type UpdateOutcome; + type UpdateError; + type DeleteOutcome; + type DeleteError; +} + +#[cfg(feature = "tokio-postgres")] +impl Client for tokio_postgres::Client { + type Traits = crate::PostgresTypesTraits; + + type PrepareError = tokio_postgres::Error; + + type PreparedStatement = tokio_postgres::Statement; + + type Rows = Vec; + + type Row = tokio_postgres::Row; + + type RowReadColumnError = tokio_postgres::Error; + + type QueryError = tokio_postgres::Error; + + type InsertOutcome = u64; + + type InsertError = tokio_postgres::Error; + + type UpdateOutcome = u64; + + type UpdateError = tokio_postgres::Error; + + type DeleteOutcome = u64; + + type DeleteError = tokio_postgres::Error; +} + +/// Base trait that all table types implement. Allows for inserting rows and selecting all rows. +#[allow(async_fn_in_trait)] +pub trait Table: Sized { + const SCHEMA: Option<&str>; + const NAME: &str; + + type SelectAllStatement; + + async fn prepare_select_all(client: &C) -> Result; + + /// Query all rows in the database table and load them into `Container`. + async fn select_all>( + client: &C, + select_all_statement: &Self::SelectAllStatement, + ) -> Result; + + type InsertStatement; + + async fn prepare_insert(client: &C) -> Result; + + /// Insert this value into the database table. + async fn insert( + &self, + client: &C, + insert_statement: &Self::InsertStatement, + ) -> Result; +} + +/// Trait that all table types with a primary key implement. +/// +/// In addition to what's allowed by [Table], also allows +/// updating, single row select, and deletion. +#[allow(async_fn_in_trait)] +pub trait TableWithPK: Table { + type PrimaryKeyRef<'a>: From<&'a Self> + where + Self: 'a; + + type UpdateStatement; + + async fn prepare_update(client: &C) -> Result; + + /// Update the row in the database table whose primary key is equal to this value'sm making the rest of the row equal too. + async fn update( + &self, + client: &C, + update_statement: &Self::UpdateStatement, + ) -> Result; + + type SelectByPKStatement; + + async fn prepare_select_by_pk(client: &C) + -> Result; + + async fn select_by_pk( + client: &C, + select_by_pk_statement: &Self::SelectByPKStatement, + pk: Self::PrimaryKeyRef<'_>, + ) -> Result, C::QueryError>; + + type DeleteByPKStatememt; + + async fn prepare_delete_by_pk(client: &C) + -> Result; + + async fn delete_by_pk( + client: &C, + delete_by_pk_statement: &Self::DeleteByPKStatememt, + pk: Self::PrimaryKeyRef<'_>, + ) -> Result; + + async fn delete_using_pk( + &self, + client: &C, + delete_by_pk_statement: &Self::DeleteByPKStatememt, + ) -> Result { + Self::delete_by_pk( + client, + delete_by_pk_statement, + Self::PrimaryKeyRef::from(self), + ) + .await + } +} diff --git a/rasql-traits/src/lib.rs b/rasql-traits/src/lib.rs new file mode 100644 index 0000000..f6853ce --- /dev/null +++ b/rasql-traits/src/lib.rs @@ -0,0 +1,43 @@ +mod sync; +pub mod r#async; + +pub trait DbTraits {} + +pub trait Id: Copy + Eq { + type Underlying; + + fn to_underlying(self) -> Self::Underlying; + + fn from_underlying(underlying: Self::Underlying) -> Self; +} + +pub trait TrustedId: Copy + Eq { + type Underlying; + + type Untrusted: UntrustedId; + + unsafe fn from_untrusted_unchecked(untrusted: Self::Untrusted) -> Self; + + fn to_untrusted(self) -> Self::Untrusted; + + fn to_underlying(self) -> Self::Underlying; +} + +pub trait UntrustedId: Copy + Eq { + type Underlying; + + type Trusted: TrustedId; + + fn from_underlying(underlying: Self::Underlying) -> Self; + + fn from_trusted(trusted: Self::Trusted) -> Self; + + unsafe fn to_trusted_unchecked(self) -> Self::Trusted; +} + + +#[cfg(feature = "tokio-postgres")] +pub struct PostgresTypesTraits; + +#[cfg(feature = "tokio-postgres")] +impl DbTraits for PostgresTypesTraits {} diff --git a/rasql-traits/src/sync.rs b/rasql-traits/src/sync.rs new file mode 100644 index 0000000..e69de29