now products have different options, like different parameters
This commit is contained in:
Priec
@@ -40,6 +40,7 @@ mod m20260621_000002_account_product_prices;
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mod m20260621_000003_discount_profiles;
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mod m20260621_000004_add_business_sale_price_to_products;
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mod m20260622_000001_audience_discount_profiles;
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mod m20260622_000002_product_variants;
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pub struct Migrator;
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#[async_trait::async_trait]
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@@ -84,6 +85,7 @@ impl MigratorTrait for Migrator {
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Box::new(m20260621_000003_discount_profiles::Migration),
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Box::new(m20260621_000004_add_business_sale_price_to_products::Migration),
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Box::new(m20260622_000001_audience_discount_profiles::Migration),
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Box::new(m20260622_000002_product_variants::Migration),
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// inject-above (do not remove this comment)
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]
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}
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204
migration/src/m20260622_000002_product_variants.rs
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204
migration/src/m20260622_000002_product_variants.rs
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@@ -0,0 +1,204 @@
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//! Introduce product variants as the purchasable unit.
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//!
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//! A product becomes a presentation grouping (name, description, images,
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//! category, tags, percentage discount profiles). Each product owns one or more
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//! `product_variants`, and the variant is what carries the things that actually
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//! differ between options: a free-text `label` (e.g. "rolovaná 90cm x 10m",
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//! "5ml"), its own `sku`, `stock`, regular `price_cents`, and its own optional
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//! public/business quick-sale prices.
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//!
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//! This migration:
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//! 1. creates `product_variants`,
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//! 2. backfills one variant per existing product from the product's current
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//! price/stock/sku/sale columns,
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//! 3. moves the per-account negotiated price and collision-resolution tables
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//! from keying on `product_id` to `variant_id`,
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//! 4. snapshots the variant onto `order_items`,
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//! 5. drops the now-moved purchasable columns from `products`.
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use sea_orm_migration::prelude::*;
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#[derive(DeriveMigrationName)]
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pub struct Migration;
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#[async_trait::async_trait]
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impl MigrationTrait for Migration {
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async fn up(&self, m: &SchemaManager) -> Result<(), DbErr> {
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let db = m.get_connection();
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// 1. The variants table.
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db.execute_unprepared(
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r#"
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CREATE TABLE product_variants (
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id SERIAL PRIMARY KEY,
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created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
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product_id INTEGER NOT NULL REFERENCES products(id) ON DELETE CASCADE,
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label VARCHAR NOT NULL DEFAULT '',
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position INTEGER NOT NULL DEFAULT 0,
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sku VARCHAR,
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stock INTEGER NOT NULL DEFAULT 0,
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price_cents BIGINT NOT NULL,
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sale_price_cents BIGINT,
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business_sale_price_cents BIGINT
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);
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CREATE INDEX idx_product_variants_product ON product_variants (product_id);
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"#,
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)
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.await?;
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// 2. One variant per existing product, carrying its current pricing.
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db.execute_unprepared(
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r#"
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INSERT INTO product_variants
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(product_id, label, position, sku, stock,
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price_cents, sale_price_cents, business_sale_price_cents)
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SELECT id, '', 0, sku, stock,
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price_cents, sale_price_cents, business_sale_price_cents
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FROM products;
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"#,
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)
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.await?;
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// 3a. Negotiated prices: product_id -> variant_id.
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db.execute_unprepared(
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r#"
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ALTER TABLE account_product_prices ADD COLUMN variant_id INTEGER;
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UPDATE account_product_prices a
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SET variant_id = pv.id
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FROM product_variants pv
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WHERE pv.product_id = a.product_id;
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DROP INDEX IF EXISTS idx_account_product_prices_user_product_unique;
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ALTER TABLE account_product_prices DROP COLUMN product_id;
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ALTER TABLE account_product_prices ALTER COLUMN variant_id SET NOT NULL;
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ALTER TABLE account_product_prices
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ADD CONSTRAINT fk_account_product_prices_variant
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FOREIGN KEY (variant_id) REFERENCES product_variants(id) ON DELETE CASCADE;
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CREATE UNIQUE INDEX idx_account_product_prices_user_variant_unique
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ON account_product_prices (user_id, variant_id);
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"#,
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)
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.await?;
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// 3b. Collision resolutions: product_id -> variant_id.
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db.execute_unprepared(
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r#"
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ALTER TABLE account_product_resolutions ADD COLUMN variant_id INTEGER;
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UPDATE account_product_resolutions a
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SET variant_id = pv.id
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FROM product_variants pv
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WHERE pv.product_id = a.product_id;
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DROP INDEX IF EXISTS idx_account_product_resolutions_unique;
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ALTER TABLE account_product_resolutions DROP COLUMN product_id;
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ALTER TABLE account_product_resolutions ALTER COLUMN variant_id SET NOT NULL;
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ALTER TABLE account_product_resolutions
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ADD CONSTRAINT fk_account_product_resolutions_variant
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FOREIGN KEY (variant_id) REFERENCES product_variants(id) ON DELETE CASCADE;
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CREATE UNIQUE INDEX idx_account_product_resolutions_unique
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ON account_product_resolutions (user_id, variant_id);
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"#,
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)
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.await?;
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// 4. Snapshot the variant on order lines (label is frozen at order time;
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// the FK is nullable + SET NULL so deleting a variant keeps history).
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db.execute_unprepared(
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r#"
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ALTER TABLE order_items ADD COLUMN variant_label VARCHAR NOT NULL DEFAULT '';
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ALTER TABLE order_items ADD COLUMN variant_id INTEGER
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REFERENCES product_variants(id) ON DELETE SET NULL;
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"#,
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)
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.await?;
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// 5. Drop the purchasable columns now owned by the variant.
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db.execute_unprepared(
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r#"
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ALTER TABLE products DROP COLUMN price_cents;
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ALTER TABLE products DROP COLUMN sale_price_cents;
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ALTER TABLE products DROP COLUMN business_sale_price_cents;
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ALTER TABLE products DROP COLUMN sku;
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ALTER TABLE products DROP COLUMN stock;
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"#,
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)
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.await?;
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Ok(())
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}
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async fn down(&self, m: &SchemaManager) -> Result<(), DbErr> {
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let db = m.get_connection();
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// Restore product columns from each product's first variant.
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db.execute_unprepared(
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r#"
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ALTER TABLE products ADD COLUMN price_cents BIGINT NOT NULL DEFAULT 0;
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ALTER TABLE products ADD COLUMN sale_price_cents BIGINT;
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ALTER TABLE products ADD COLUMN business_sale_price_cents BIGINT;
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ALTER TABLE products ADD COLUMN sku VARCHAR;
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ALTER TABLE products ADD COLUMN stock INTEGER NOT NULL DEFAULT 0;
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UPDATE products p SET
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price_cents = pv.price_cents,
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sale_price_cents = pv.sale_price_cents,
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business_sale_price_cents = pv.business_sale_price_cents,
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sku = pv.sku,
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stock = pv.stock
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FROM (
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SELECT DISTINCT ON (product_id) product_id, price_cents,
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sale_price_cents, business_sale_price_cents, sku, stock
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FROM product_variants ORDER BY product_id, position, id
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) pv
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WHERE pv.product_id = p.id;
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"#,
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)
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.await?;
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db.execute_unprepared(
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r#"
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ALTER TABLE order_items DROP COLUMN variant_id;
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ALTER TABLE order_items DROP COLUMN variant_label;
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"#,
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)
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.await?;
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db.execute_unprepared(
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r#"
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ALTER TABLE account_product_resolutions ADD COLUMN product_id INTEGER;
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UPDATE account_product_resolutions a
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SET product_id = pv.product_id
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FROM product_variants pv WHERE pv.id = a.variant_id;
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DROP INDEX IF EXISTS idx_account_product_resolutions_unique;
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ALTER TABLE account_product_resolutions DROP COLUMN variant_id;
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ALTER TABLE account_product_resolutions ALTER COLUMN product_id SET NOT NULL;
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ALTER TABLE account_product_resolutions
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ADD CONSTRAINT fk_account_product_resolutions_product
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FOREIGN KEY (product_id) REFERENCES products(id) ON DELETE CASCADE;
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CREATE UNIQUE INDEX idx_account_product_resolutions_unique
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ON account_product_resolutions (user_id, product_id);
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"#,
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)
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.await?;
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db.execute_unprepared(
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r#"
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ALTER TABLE account_product_prices ADD COLUMN product_id INTEGER;
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UPDATE account_product_prices a
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SET product_id = pv.product_id
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FROM product_variants pv WHERE pv.id = a.variant_id;
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DROP INDEX IF EXISTS idx_account_product_prices_user_variant_unique;
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ALTER TABLE account_product_prices DROP COLUMN variant_id;
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ALTER TABLE account_product_prices ALTER COLUMN product_id SET NOT NULL;
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ALTER TABLE account_product_prices
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ADD CONSTRAINT fk_account_product_prices_product
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FOREIGN KEY (product_id) REFERENCES products(id) ON DELETE CASCADE;
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CREATE UNIQUE INDEX idx_account_product_prices_user_product_unique
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ON account_product_prices (user_id, product_id);
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"#,
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)
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.await?;
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db.execute_unprepared("DROP TABLE product_variants;").await?;
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Ok(())
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}
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}
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