Product variant in shopping cart

crates/cart_manager/migrations/202204131841_init.sql

@@ -25,7 +25,7 @@ CREATE TABLE shopping_carts (
 
 CREATE TABLE shopping_cart_items (
     id serial NOT NULL,
-    product_id integer NOT NULL,
+    product_variant_id integer NOT NULL,
     shopping_cart_id integer,
     quantity integer DEFAULT 0 NOT NULL,
     quantity_unit "QuantityUnit" NOT NULL,

crates/cart_manager/src/db/shopping_cart_items.rs

@@ -1,3 +1,4 @@
+use model::v2::ProductVariantId;
 use model::*;
 
 pub type Result<T> = std::result::Result<T, Error>;
@@ -18,10 +19,10 @@ pub enum Error {
     CartItems(ShoppingCartId),
     #[error("Can't find shopping cart item doe to lack of identity")]
     NoIdentity,
-    #[error("Failed to update shopping cart item with id {shopping_cart_item_id:?} and/or product id {product_id:?}")]
+    #[error("Failed to update shopping cart item with id {shopping_cart_item_id:?} and/or product variant id {product_variant_id:?}")]
     Update {
         shopping_cart_item_id: Option<ShoppingCartItemId>,
-        product_id: Option<ProductId>,
+        product_variant_id: Option<ProductVariantId>,
     },
 }
 
@@ -36,7 +37,7 @@ impl AllShoppingCartItems {
         sqlx::query_as(
             r#"
 SELECT  shopping_cart_items.id,
-        shopping_cart_items.product_id,
+        shopping_cart_items.product_variant_id,
         shopping_cart_items.shopping_cart_id,
         shopping_cart_items.quantity,
         shopping_cart_items.quantity_unit
@@ -72,7 +73,7 @@ impl AccountShoppingCartItems {
             Some(shopping_cart_id) => sqlx::query_as(
                 r#"
 SELECT shopping_cart_items.id as id,
-       shopping_cart_items.product_id as product_id,
+       shopping_cart_items.product_variant_id as product_variant_id,
        shopping_cart_items.shopping_cart_id as shopping_cart_id,
        shopping_cart_items.quantity as quantity,
        shopping_cart_items.quantity_unit as quantity_unit
@@ -88,7 +89,7 @@ ORDER BY shopping_cart_items.id
             None => sqlx::query_as(
                 r#"
 SELECT shopping_cart_items.id as id,
-       shopping_cart_items.product_id as product_id,
+       shopping_cart_items.product_variant_id as product_variant_id,
        shopping_cart_items.shopping_cart_id as shopping_cart_id,
        shopping_cart_items.quantity as quantity,
        shopping_cart_items.quantity_unit as quantity_unit
@@ -112,7 +113,7 @@ ORDER BY shopping_cart_items.id
 
 #[derive(Debug)]
 pub struct CreateShoppingCartItem {
-    pub product_id: ProductId,
+    pub product_variant_id: ProductVariantId,
     pub shopping_cart_id: ShoppingCartId,
     pub quantity: Quantity,
     pub quantity_unit: QuantityUnit,
@@ -126,12 +127,12 @@ impl CreateShoppingCartItem {
         let msg = self;
         sqlx::query_as(
             r#"
-INSERT INTO shopping_cart_items (product_id, shopping_cart_id, quantity, quantity_unit)
+INSERT INTO shopping_cart_items (product_variant_id, shopping_cart_id, quantity, quantity_unit)
 VALUES ($1, $2, $3, $4)
-RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
+RETURNING id, product_variant_id, shopping_cart_id, quantity, quantity_unit
     "#,
         )
-        .bind(msg.product_id)
+        .bind(msg.product_variant_id)
         .bind(msg.shopping_cart_id)
         .bind(msg.quantity)
         .bind(msg.quantity_unit)
@@ -148,7 +149,7 @@ RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
 #[derive(Debug)]
 pub struct UpdateShoppingCartItem {
     pub id: ShoppingCartItemId,
-    pub product_id: ProductId,
+    pub product_variant_id: ProductVariantId,
     pub shopping_cart_id: ShoppingCartId,
     pub quantity: Quantity,
     pub quantity_unit: QuantityUnit,
@@ -163,13 +164,13 @@ impl UpdateShoppingCartItem {
         sqlx::query_as(
             r#"
 UPDATE shopping_cart_items 
-SET product_id = $2, shopping_cart_id = $3, quantity = $4, quantity_unit = $5
+SET product_variant_id = $2, shopping_cart_id = $3, quantity = $4, quantity_unit = $5
 WHERE id = $1
-RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
+RETURNING id, product_variant_id, shopping_cart_id, quantity, quantity_unit
     "#,
         )
         .bind(msg.id)
-        .bind(msg.product_id)
+        .bind(msg.product_variant_id)
         .bind(msg.shopping_cart_id)
         .bind(msg.quantity)
         .bind(msg.quantity_unit)
@@ -197,7 +198,7 @@ impl DeleteShoppingCartItem {
             r#"
 DELETE FROM shopping_cart_items 
 WHERE id = $1
-RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
+RETURNING id, product_variant_id, shopping_cart_id, quantity, quantity_unit
     "#,
         )
         .bind(msg.id)
@@ -223,7 +224,7 @@ impl FindShoppingCartItem {
         let msg = self;
         sqlx::query_as(
             r#"
-SELECT id, product_id, shopping_cart_id, quantity, quantity_unit
+SELECT id, product_variant_id, shopping_cart_id, quantity, quantity_unit
 FROM shopping_cart_items
 WHERE id = $1
     "#,
@@ -240,7 +241,7 @@ WHERE id = $1
 
 #[derive(Debug)]
 pub struct ActiveCartItemByProduct {
-    pub product_id: ProductId,
+    pub product_variant_id: ProductVariantId,
 }
 
 impl ActiveCartItemByProduct {
@@ -252,19 +253,19 @@ impl ActiveCartItemByProduct {
         sqlx::query_as(
             r#"
 SELECT  shopping_cart_items.id,
-        shopping_cart_items.product_id,
+        shopping_cart_items.product_variant_id,
         shopping_cart_items.shopping_cart_id,
         shopping_cart_items.quantity,
         shopping_cart_items.quantity_unit
 FROM shopping_cart_items
 INNER JOIN shopping_carts
     ON shopping_cart_items.shopping_cart_id = shopping_carts.id
-WHERE product_id = $1
+WHERE product_variant_id = $1
     AND shopping_carts.state = $2
 ORDER BY shopping_cart_items.id ASC
     "#,
         )
-        .bind(msg.product_id)
+        .bind(msg.product_variant_id)
         .bind(model::ShoppingCartState::Active)
         .fetch_optional(t)
         .await
@@ -290,7 +291,7 @@ impl CartItems {
         sqlx::query_as(
             r#"
 SELECT  id,
-        product_id,
+        product_variant_id,
         shopping_cart_id,
         quantity,
         quantity_unit
@@ -313,7 +314,7 @@ ORDER BY shopping_cart_items.id ASC
 pub struct RemoveCartItem {
     pub shopping_cart_id: ShoppingCartId,
     pub shopping_cart_item_id: Option<ShoppingCartItemId>,
-    pub product_id: Option<ProductId>,
+    pub product_variant_id: Option<ProductVariantId>,
 }
 
 impl RemoveCartItem {
@@ -322,35 +323,35 @@ impl RemoveCartItem {
         t: &mut sqlx::Transaction<'_, sqlx::Postgres>,
     ) -> Result<Option<ShoppingCartItem>> {
         let msg = self;
-        match (msg.shopping_cart_item_id, msg.product_id) {
+        match (msg.shopping_cart_item_id, msg.product_variant_id) {
             (Some(shopping_cart_item_id), None) => sqlx::query_as(
                 r#"
 DELETE FROM shopping_cart_items
 WHERE shopping_cart_id = $1 AND id = $2
-RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
+RETURNING id, product_variant_id, shopping_cart_id, quantity, quantity_unit
         "#,
             )
             .bind(msg.shopping_cart_id)
             .bind(shopping_cart_item_id),
-            (Some(shopping_cart_item_id), Some(product_id)) => sqlx::query_as(
+            (Some(shopping_cart_item_id), Some(product_variant_id)) => sqlx::query_as(
                 r#"
 DELETE FROM shopping_cart_items
-WHERE shopping_cart_id = $1 AND id = $2 AND product_id = $3
+WHERE shopping_cart_id = $1 AND id = $2 AND product_variant_id = $3
-RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
+RETURNING id, product_variant_id, shopping_cart_id, quantity, quantity_unit
         "#,
             )
             .bind(msg.shopping_cart_id)
             .bind(shopping_cart_item_id)
-            .bind(product_id),
+            .bind(product_variant_id),
-            (None, Some(product_id)) => sqlx::query_as(
+            (None, Some(product_variant_id)) => sqlx::query_as(
                 r#"
 DELETE FROM shopping_cart_items
-WHERE shopping_cart_id = $1 AND product_id = $2
+WHERE shopping_cart_id = $1 AND product_variant_id = $2
-RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
+RETURNING id, product_variant_id, shopping_cart_id, quantity, quantity_unit
         "#,
             )
             .bind(msg.shopping_cart_id)
-            .bind(product_id),
+            .bind(product_variant_id),
             _ => return Err(Error::NoIdentity),
         }
         .fetch_optional(t)
@@ -359,7 +360,7 @@ RETURNING id, product_id, shopping_cart_id, quantity, quantity_unit
             tracing::error!("{e:?}");
             Error::Update {
                 shopping_cart_item_id: msg.shopping_cart_item_id,
-                product_id: msg.product_id,
+                product_variant_id: msg.product_variant_id,
             }
         })
     }
@@ -423,7 +424,7 @@ WHERE buyer_id = $1
     async fn test_shopping_cart_item(
         t: &mut sqlx::Transaction<'_, sqlx::Postgres>,
         shopping_cart_id: Option<ShoppingCartId>,
-        product_id: Option<ProductId>,
+        product_variant_id: Option<ProductVariantId>,
     ) -> ShoppingCartItem {
         let shopping_cart_id = match shopping_cart_id {
             Some(id) => id,
@@ -433,12 +434,12 @@ WHERE buyer_id = $1
                     .id
             }
         };
-        let product_id = match product_id {
+        let product_variant_id = match product_variant_id {
             Some(id) => id,
             _ => 1.into(),
         };
         CreateShoppingCartItem {
-            product_id,
+            product_variant_id,
             shopping_cart_id,
             quantity: Quantity::from_u32(496879),
             quantity_unit: QuantityUnit::Gram,
@@ -565,7 +566,7 @@ WHERE buyer_id = $1
 
         let updated = UpdateShoppingCartItem {
             id: item.id,
-            product_id: item.product_id,
+            product_variant_id: item.product_variant_id,
             shopping_cart_id: item.shopping_cart_id,
             quantity: Quantity::from_u32(987979879),
             quantity_unit: QuantityUnit::Kilogram,
@@ -579,7 +580,7 @@ WHERE buyer_id = $1
             updated,
             ShoppingCartItem {
                 id: item.id,
-                product_id: item.product_id,
+                product_variant_id: item.product_variant_id,
                 shopping_cart_id: item.shopping_cart_id,
                 quantity: Quantity::from_u32(987979879),
                 quantity_unit: QuantityUnit::Kilogram,

crates/channels/src/stocks/mod.rs

@@ -50,6 +50,10 @@ pub enum Error {
     UpdateProductStock(ProductVariantId),
     #[error("Failed to load all product photos")]
     AllProductPhotos,
+    #[error("Failed to load products {0:?}")]
+    FindProducts(Vec<ProductVariantId>),
+    #[error("Failed to load product variants {0:?}")]
+    FindProductVariants(Vec<ProductVariantId>),
 }
 
 pub mod rpc {
@@ -113,6 +117,14 @@ pub mod rpc {
 
         /// List of products with stock size and photos
         async fn detailed_products(input: detailed_products::Input) -> detailed_products::Output;
+
+        /// List of products for shopping cart
+        async fn shopping_cart_products(input: find_products::Input) -> find_products::Output;
+
+        /// List of products variants for shopping cart
+        async fn shopping_cart_product_variants(
+            input: find_product_variants::Input,
+        ) -> find_product_variants::Output;
     }
 
     pub async fn create_client(config: SharedAppConfig) -> StocksClient {

crates/channels/src/stocks/product.rs

@@ -80,6 +80,46 @@ pub mod delete_product {
     pub type Output = Result<Details, Error>;
 }
 
+pub mod find_products {
+    use model::v2::*;
+
+    use crate::stocks::Error;
+
+    #[derive(Debug, serde::Serialize, serde::Deserialize)]
+    pub struct Input {
+        pub variant_ids: Vec<ProductVariantId>,
+        pub limit: Limit,
+        pub offset: Offset,
+    }
+
+    #[derive(Debug, serde::Serialize, serde::Deserialize)]
+    pub struct Details {
+        pub products: Vec<Product>,
+    }
+
+    pub type Output = Result<Details, Error>;
+}
+
+pub mod find_product_variants {
+    use model::v2::*;
+
+    use crate::stocks::Error;
+
+    #[derive(Debug, serde::Serialize, serde::Deserialize)]
+    pub struct Input {
+        pub variant_ids: Vec<ProductVariantId>,
+        pub limit: Limit,
+        pub offset: Offset,
+    }
+
+    #[derive(Debug, serde::Serialize, serde::Deserialize)]
+    pub struct Details {
+        pub product_variants: Vec<ProductVariant>,
+    }
+
+    pub type Output = Result<Details, Error>;
+}
+
 #[derive(Copy, Clone, Debug, PartialOrd, PartialEq, serde::Serialize, serde::Deserialize)]
 pub enum Topic {
     ProductCreated,

crates/model/src/api.rs

@@ -173,7 +173,7 @@ pub struct Order {
 #[derive(Serialize, Deserialize, Debug)]
 pub struct ShoppingCartItem {
     pub id: ShoppingCartItemId,
-    pub product_id: ProductId,
+    pub product_variant_id: ProductVariantId,
     pub shopping_cart_id: ShoppingCartId,
     pub quantity: Quantity,
     pub quantity_unit: QuantityUnit,
@@ -183,7 +183,7 @@ impl From<crate::ShoppingCartItem> for ShoppingCartItem {
     fn from(
         crate::ShoppingCartItem {
             id,
-            product_id,
+            product_variant_id,
             shopping_cart_id,
             quantity,
             quantity_unit,
@@ -191,7 +191,7 @@ impl From<crate::ShoppingCartItem> for ShoppingCartItem {
     ) -> Self {
         Self {
             id,
-            product_id,
+            product_variant_id,
             shopping_cart_id,
             quantity,
             quantity_unit,
@@ -233,13 +233,13 @@ impl From<(crate::ShoppingCart, Vec<crate::ShoppingCartItem>)> for ShoppingCart
                 .map(
                     |crate::ShoppingCartItem {
                          id,
-                         product_id,
+                         product_variant_id,
                          shopping_cart_id,
                          quantity,
                          quantity_unit,
                      }| ShoppingCartItem {
                         id,
-                        product_id,
+                        product_variant_id,
                         shopping_cart_id,
                         quantity,
                         quantity_unit,

crates/model/src/lib.rs

@@ -14,6 +14,7 @@ use serde::de::{Error, Visitor};
 use serde::{Deserialize, Deserializer, Serialize};
 
 pub use crate::encrypt::*;
+use crate::v2::ProductVariantId;
 
 #[derive(Debug, Hash, thiserror::Error)]
 pub enum TransformError {
@@ -961,7 +962,7 @@ pub mod v2 {
     pub use crate::{
         Day, Days, FileName, Limit, LocalPath, Offset, PhotoId, Price, ProductCategory, ProductId,
         ProductLongDesc, ProductName, ProductPhotoId, ProductShortDesc, Quantity, QuantityUnit,
-        RecordId, StockId, UniqueName,
+        RecordId, ShoppingCartId, StockId, UniqueName,
     };
 
     #[cfg_attr(feature = "db", derive(sqlx::Type))]
@@ -988,7 +989,7 @@ pub mod v2 {
     #[cfg_attr(feature = "db", sqlx(transparent))]
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Serialize, Deserialize, Deref, From)]
     #[serde(transparent)]
-    pub struct ProductVariantId(RecordId);
+    pub struct ProductVariantId(pub RecordId);
 
     #[derive(Debug, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
     pub struct DetailedProductVariant {
@@ -1215,7 +1216,7 @@ pub struct ShoppingCartItemId(RecordId);
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct ShoppingCartItem {
     pub id: ShoppingCartItemId,
-    pub product_id: ProductId,
+    pub product_variant_id: ProductVariantId,
     pub shopping_cart_id: ShoppingCartId,
     pub quantity: Quantity,
     pub quantity_unit: QuantityUnit,

crates/stock_manager/src/actions/product.rs

@@ -1,4 +1,4 @@
-use channels::stocks::{create_product, delete_product, update_product, Error};
+use channels::stocks::{create_product, delete_product, find_products, update_product, Error};
 use channels::AsyncClient;
 use config::SharedAppConfig;
 use db_utils::PgT;
@@ -195,6 +195,49 @@ pub async fn inner_delete_product(
     dbm.run(t).await.map(|product| (input.product_id, product))
 }
 
+pub async fn find_products(
+    input: find_products::Input,
+    db: Database,
+    _mqtt: AsyncClient,
+    _config: SharedAppConfig,
+) -> find_products::Output {
+    let mut t = begin_t!(db, Error::InternalServerError);
+
+    match inner_find_products(input, &mut t).await {
+        Ok(details) => {
+            if let Err(e) = t.commit().await {
+                tracing::error!("{}", e);
+                Err(Error::InternalServerError)
+            } else {
+                Ok(details)
+            }
+        }
+        Err(e) => {
+            t.rollback().await.ok();
+            Err(e)
+        }
+    }
+}
+
+async fn inner_find_products(
+    input: find_products::Input,
+    t: &mut PgT<'_>,
+) -> find_products::Output {
+    let dbm = crate::db::ShoppingCartProducts {
+        variant_ids: input.variant_ids.clone(),
+        limit: input.limit,
+        offset: input.offset,
+    };
+
+    match dbm.run(t).await {
+        Ok(products) => Ok(find_products::Details { products }),
+        Err(e) => {
+            tracing::warn!("{}", e);
+            Err(Error::FindProducts(input.variant_ids))
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use config::UpdateConfig;
@@ -303,4 +346,11 @@ mod tests {
         let (id, _new_product) = res.unwrap();
         assert_eq!(id, product.id);
     }
+
+    #[tokio::test]
+    async fn shopping_cart_products() {
+        testx::db_t_ref!(t);
+
+        testx::db_rollback!(t);
+    }
 }

crates/stock_manager/src/actions/product_variant.rs

@@ -1,5 +1,6 @@
 use channels::stocks::{
-    create_product_variant, delete_product_variant, update_product_variant, Error,
+    create_product_variant, delete_product_variant, find_product_variants, update_product_variant,
+    Error,
 };
 use channels::AsyncClient;
 use config::SharedAppConfig;
@@ -151,6 +152,51 @@ async fn inner_delete_product_variant(
     }
 }
 
+pub async fn find_product_variants(
+    input: find_product_variants::Input,
+    db: Database,
+    _mqtt: AsyncClient,
+    _config: SharedAppConfig,
+) -> find_product_variants::Output {
+    let variant_ids = input.variant_ids.clone();
+    let mut t = begin_t!(db, Error::InternalServerError);
+    match inner_find_product_variants(input, &mut t).await {
+        Ok(details) => {
+            if let Err(e) = t.commit().await {
+                tracing::warn!("{}", e);
+                Err(Error::FindProductVariants(variant_ids))
+            } else {
+                Ok(details)
+            }
+        }
+        Err(e) => {
+            t.rollback().await.ok();
+            Err(e)
+        }
+    }
+}
+
+pub async fn inner_find_product_variants(
+    input: find_product_variants::Input,
+    t: &mut PgT<'_>,
+) -> find_product_variants::Output {
+    let dbm = crate::db::ShoppingCartProductVariants {
+        variant_ids: input.variant_ids.clone(),
+        limit: input.limit,
+        offset: input.offset,
+    };
+
+    match dbm.run(t).await {
+        Ok(variants) => Ok(find_product_variants::Details {
+            product_variants: variants,
+        }),
+        Err(e) => {
+            tracing::warn!("{}", e);
+            Err(Error::FindProductVariants(input.variant_ids))
+        }
+    }
+}
+
 #[cfg(test)]
 mod test {
     use channels::stocks::{

crates/stock_manager/src/db/product_variants.rs

@@ -1,5 +1,6 @@
 use db_utils::PgT;
 use model::v2::*;
+use model::Ranged;
 
 #[derive(Debug, PartialEq, thiserror::Error)]
 pub enum Error {
@@ -7,12 +8,54 @@ pub enum Error {
     CreateProductVariant,
     #[error("Failed to load variants for products {0:?}")]
     ProductsVariants(Vec<ProductId>),
+    #[error("Failed to load variants with ids {0:?}")]
+    FindProductsVariants(Vec<ProductVariantId>),
     #[error("Failed to delete product variant {0:?}")]
     DeleteProductVariant(ProductVariantId),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
 
+#[derive(Debug)]
+pub struct ShoppingCartProductVariants {
+    pub variant_ids: Vec<ProductVariantId>,
+    pub limit: Limit,
+    pub offset: Offset,
+}
+
+impl ShoppingCartProductVariants {
+    pub async fn run(self, t: &mut PgT<'_>) -> Result<Vec<ProductVariant>> {
+        db_utils::MultiLoad::new(
+            t,
+            r#"
+SELECT id,
+    product_id,
+    name,
+    short_description,
+    long_description,
+    price
+FROM product_variants
+WHERE
+    "#,
+            "shopping_cart_id = $1",
+        )
+        .with_sorting("products.id")
+        .with_padding(
+            self.limit.in_range(1..200).into_raw(),
+            self.offset.in_range(0..u32::MAX).into_raw(),
+        )
+        .load(
+            self.variant_ids.len(),
+            self.variant_ids.iter().map(|id| id.0),
+            |e| {
+                tracing::warn!("{e:?}");
+                Error::FindProductsVariants(self.variant_ids.clone())
+            },
+        )
+        .await
+    }
+}
+
 #[derive(Debug)]
 pub struct CreateProductVariant {
     pub product_id: ProductId,

crates/stock_manager/src/db/products.rs

@@ -1,8 +1,8 @@
 use db_utils::PgT;
 use model::v2::*;
-use model::{Ranged, ShoppingCartId};
+use model::Ranged;
 
-#[derive(Debug, Copy, Clone, PartialEq, Eq, serde::Serialize, thiserror::Error)]
+#[derive(Debug, Clone, PartialEq, Eq, serde::Serialize, thiserror::Error)]
 pub enum Error {
     #[error("Unable to load all products")]
     All,
@@ -12,12 +12,10 @@ pub enum Error {
     Update(ProductId),
     #[error("Unable to delete product")]
     Delete(ProductId),
-    #[error("Unable to find products for shopping cart")]
-    ShoppingCartProducts(ShoppingCartId),
     #[error("Product with id {0} can't be found")]
     Single(ProductId),
-    #[error("Failed to load products for given ids")]
+    #[error("Failed to load products for given variant ids")]
-    FindProducts,
+    FindProductsByVariants(Vec<ProductVariantId>),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
@@ -44,8 +42,8 @@ ORDER BY id
 LIMIT $1 OFFSET $2
     "#,
         )
-        .bind(self.limit.max(1).min(200))
+        .bind(self.limit.in_range(1..200))
-        .bind(self.offset.max(0))
+        .bind(self.offset.in_range(0..u32::MAX))
         .fetch_all(pool)
         .await
         .map_err(|e| {
@@ -193,68 +191,38 @@ RETURNING id,
 
 #[derive(Debug)]
 pub struct ShoppingCartProducts {
-    pub shopping_cart_id: ShoppingCartId,
+    pub variant_ids: Vec<ProductVariantId>,
     pub limit: Limit,
     pub offset: Offset,
 }
 
 impl ShoppingCartProducts {
     pub async fn run(self, t: &mut PgT<'_>) -> Result<Vec<Product>> {
-        sqlx::query_as(
+        db_utils::MultiLoad::new(
+            t,
             r#"
-SELECT products.id,
+SELECT p.id,
-    products.name,
+    p.name,
-    products.category,
+    p.category,
-    products.deliver_days_flag
+    p.deliver_days_flag
-FROM products
+FROM products p
-INNER JOIN shopping_cart_items ON shopping_cart_items.product_id = products.id
+INNER JOIN product_variants v
-WHERE shopping_cart_id = $1
+    ON v.product_id = p.id
-ORDER BY products.id
-LIMIT $2 OFFSET $3 
-    "#,
-        )
-        .bind(self.shopping_cart_id)
-        .bind(self.limit.in_range(1..200))
-        .bind(self.offset.in_range(0..u32::MAX))
-        .fetch_all(t)
-        .await
-        .map_err(|e| {
-            tracing::warn!("{e:?}");
-            Error::ShoppingCartProducts(self.shopping_cart_id)
-        })
-    }
-}
-
-#[derive(Debug)]
-pub struct FindProducts {
-    pub product_ids: Vec<ProductId>,
-}
-
-impl FindProducts {
-    pub async fn run(
-        self,
-        pool: &mut sqlx::Transaction<'_, sqlx::Postgres>,
-    ) -> Result<Vec<Product>> {
-        let mut loader = db_utils::MultiLoad::new(
-            pool,
-            r#"
-SELECT id,
-    name,
-    category,
-    deliver_days_flag
-FROM products
 WHERE
     "#,
-            "products.id =",
+            "p.id = $1",
+        )
+        .with_sorting("p.id")
+        .with_padding(
+            self.limit.in_range(1..200).into_raw(),
+            self.offset.in_range(0..u32::MAX).into_raw(),
         )
-        .with_size(200);
-        loader
         .load(
-                self.product_ids.len(),
+            self.variant_ids.len(),
-                self.product_ids.into_iter().map(|id| *id),
+            self.variant_ids.iter().map(|id| id.0),
             |e| {
                 tracing::warn!("{e:?}");
-                    Error::FindProducts
+                Error::FindProductsByVariants(self.variant_ids.clone())
             },
         )
         .await

crates/stock_manager/src/db/stocks.rs

@@ -10,8 +10,8 @@ pub enum Error {
     Update(StockId),
     #[error("Unable to delete stock {0:?}")]
     Delete(StockId),
-    #[error("Unable to delete all stock for variant {0:?}")]
+    // #[error("Unable to delete all stock for variant {0:?}")]
-    DeleteAllProductStocks(ProductId),
+    // DeleteAllProductStocks(ProductId),
     #[error("Unable find stock for product")]
     ProductVariantStock,
     #[error("Stock {0:?} does not exists")]

crates/stock_manager/src/rpc.rs

@@ -125,6 +125,22 @@ pub mod rpc {
         ) -> detailed_products::Output {
             actions::detailed_products(input, self.db, self.mqtt_client, self.config).await
         }
+
+        async fn shopping_cart_products(
+            self,
+            _: context::Context,
+            input: find_products::Input,
+        ) -> find_products::Output {
+            actions::find_products(input, self.db, self.mqtt_client, self.config).await
+        }
+
+        async fn shopping_cart_product_variants(
+            self,
+            _: context::Context,
+            input: find_product_variants::Input,
+        ) -> find_product_variants::Output {
+            actions::find_product_variants(input, self.db, self.mqtt_client, self.config).await
+        }
     }
 }