Trait DatabaseSchema 

pub trait DatabaseSchema<M, A = AccessControlList>
where
    M: MemoryProvider,
    A: AccessControl,
{
    // Required methods
    fn select(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        table_name: &str,
        query: Query,
    ) -> DbmsResult<Vec<Vec<(ColumnDef, Value)>>>;
    fn referenced_tables(
        &self,
        table: &'static str,
    ) -> Vec<(&'static str, Vec<&'static str>)>;
    fn insert(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        table_name: &'static str,
        record_values: &[(ColumnDef, Value)],
    ) -> DbmsResult<()>;
    fn delete(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        table_name: &'static str,
        delete_behavior: DeleteBehavior,
        filter: Option<Filter>,
    ) -> DbmsResult<u64>;
    fn update(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        table_name: &'static str,
        patch_values: &[(ColumnDef, Value)],
        filter: Option<Filter>,
    ) -> DbmsResult<u64>;
    fn validate_insert(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        table_name: &'static str,
        record_values: &[(ColumnDef, Value)],
    ) -> DbmsResult<()>;
    fn validate_update(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        table_name: &'static str,
        record_values: &[(ColumnDef, Value)],
        old_pk: Value,
    ) -> DbmsResult<()>;

    // Provided method
    fn select_join(
        &self,
        dbms: &WasmDbmsDatabase<'_, M, A>,
        from_table: &str,
        query: Query,
    ) -> DbmsResult<Vec<Vec<(CandidColumnDef, Value)>>> { ... }
}

Provides schema-driven dynamic dispatch for database operations.

Implementations of this trait know which concrete table types exist and forward generic operations (identified by table name) to the appropriate typed methods on WasmDbmsDatabase.

This trait is typically implemented by generated code from the #[derive(DatabaseSchema)] macro.

Required Methods

fn select( &self, dbms: &WasmDbmsDatabase<'_, M, A>, table_name: &str, query: Query, ) -> DbmsResult<Vec<Vec<(ColumnDef, Value)>>>

Performs a generic select for the given table name and query.

fn referenced_tables( &self, table: &'static str, ) -> Vec<(&'static str, Vec<&'static str>)>

Returns tables and columns that reference the given table via foreign keys.

fn insert( &self, dbms: &WasmDbmsDatabase<'_, M, A>, table_name: &'static str, record_values: &[(ColumnDef, Value)], ) -> DbmsResult<()>

Performs an insert for the given table name.

fn delete( &self, dbms: &WasmDbmsDatabase<'_, M, A>, table_name: &'static str, delete_behavior: DeleteBehavior, filter: Option<Filter>, ) -> DbmsResult<u64>

Performs a delete for the given table name.

fn update( &self, dbms: &WasmDbmsDatabase<'_, M, A>, table_name: &'static str, patch_values: &[(ColumnDef, Value)], filter: Option<Filter>, ) -> DbmsResult<u64>

Performs an update for the given table name.

fn validate_insert( &self, dbms: &WasmDbmsDatabase<'_, M, A>, table_name: &'static str, record_values: &[(ColumnDef, Value)], ) -> DbmsResult<()>

Validates an insert operation.

fn validate_update( &self, dbms: &WasmDbmsDatabase<'_, M, A>, table_name: &'static str, record_values: &[(ColumnDef, Value)], old_pk: Value, ) -> DbmsResult<()>

Validates an update operation.

Provided Methods

fn select_join( &self, dbms: &WasmDbmsDatabase<'_, M, A>, from_table: &str, query: Query, ) -> DbmsResult<Vec<Vec<(CandidColumnDef, Value)>>>

Performs a join query, returning results with column definitions that include source table names.

Implementors