Refactors backend

3 files changed, 20 insertions, 0 deletions

diff --git a/backend/src/queries/transaction_categorisations/mod.rs b/backend/src/queries/transaction_categorisations/mod.rs
new file mode 100644
index 0000000..d4217cc
--- /dev/null
+++ b/backend/src/queries/transaction_categorisations/mod.rs
@@ -0,0 +1,3 @@
+mod sum_quantity_per_category_id;
+
+pub use sum_quantity_per_category_id::sum_transaction_categorisation_quantity_per_category_id;
diff --git a/backend/src/queries/transaction_categorisations/sum_quantity_per_category_id.rs b/backend/src/queries/transaction_categorisations/sum_quantity_per_category_id.rs
new file mode 100644
index 0000000..7f93e0c
--- /dev/null
+++ b/backend/src/queries/transaction_categorisations/sum_quantity_per_category_id.rs
@@ -0,0 +1,17 @@
+use crate::schema::transaction_categorisations::{
+    self as transaction_categorisations_schema,
+    dsl::transaction_categorisations as transaction_categorisations_table,
+};
+use diesel::{dsl::sum, result::Error, QueryDsl, RunQueryDsl, SqliteConnection};
+
+pub fn sum_transaction_categorisation_quantity_per_category_id(
+    connection: &mut SqliteConnection,
+) -> Result<Vec<(i32, Option<i64>)>, Error> {
+    transaction_categorisations_table
+        .group_by(transaction_categorisations_schema::category_id)
+        .select((
+            transaction_categorisations_schema::category_id,
+            sum(transaction_categorisations_schema::quantity),
+        ))
+        .load::<(i32, Option<i64>)>(connection)
+}
diff --git a/backend/src/queries/transaction_categorisations/sum_quantity_per_to_category_id.rs b/backend/src/queries/transaction_categorisations/sum_quantity_per_to_category_id.rs
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/backend/src/queries/transaction_categorisations/sum_quantity_per_to_category_id.rs