basket logic working

src/models/account_cart_items.rs

@@ -0,0 +1,55 @@
+pub use crate::models::_entities::account_cart_items::{ActiveModel, Column, Entity, Model};
+use sea_orm::entity::prelude::*;
+use sea_orm::{ActiveValue, QueryFilter, QueryOrder};
+
+pub type AccountCartItems = Entity;
+
+#[async_trait::async_trait]
+impl ActiveModelBehavior for ActiveModel {
+    async fn before_save<C>(self, _db: &C, _insert: bool) -> std::result::Result<Self, DbErr>
+    where
+        C: ConnectionTrait,
+    {
+        Ok(self)
+    }
+}
+
+impl Model {
+    pub async fn find_for_user(
+        db: &DatabaseConnection,
+        user_id: i32,
+    ) -> Result<Vec<(i32, i32)>, DbErr> {
+        Ok(Entity::find()
+            .filter(Column::UserId.eq(user_id))
+            .order_by_asc(Column::Id)
+            .all(db)
+            .await?
+            .into_iter()
+            .filter_map(|item| (item.quantity > 0).then_some((item.variant_id, item.quantity)))
+            .collect())
+    }
+
+    pub async fn replace_for_user(
+        db: &DatabaseConnection,
+        user_id: i32,
+        items: &[(i32, i32)],
+    ) -> Result<(), DbErr> {
+        Entity::delete_many()
+            .filter(Column::UserId.eq(user_id))
+            .exec(db)
+            .await?;
+
+        for (variant_id, quantity) in items.iter().copied().filter(|(_, qty)| *qty > 0) {
+            ActiveModel {
+                user_id: ActiveValue::set(user_id),
+                variant_id: ActiveValue::set(variant_id),
+                quantity: ActiveValue::set(quantity),
+                ..Default::default()
+            }
+            .insert(db)
+            .await?;
+        }
+
+        Ok(())
+    }
+}