0 is out of stock and nothing is available from now on

assets/i18n/en/main.ftl

@@ -212,6 +212,9 @@ sale-price = Sale price
 variants-options = Variants / options
 add-option = Add option
 option-label = Option label
+optional = optional
+stock-untracked-hint = Leave blank = available without stock tracking
+available = Available
 choose-option = Choose an option
 from-price = from { $price }
 admin-discounts = Discounts

assets/i18n/sk/main.ftl

@@ -212,6 +212,9 @@ sale-price = Zľavnená cena
 variants-options = Varianty / možnosti
 add-option = Pridať možnosť
 option-label = Označenie možnosti
+optional = voliteľné
+stock-untracked-hint = Nechajte prázdne = dostupné bez sledovania zásob
+available = Dostupné
 choose-option = Vyberte možnosť
 from-price = od { $price }
 admin-discounts = Zľavy

assets/views/admin/catalog/product_form.html

@@ -37,9 +37,12 @@
 
   {# --- Variants / options editor ------------------------------------------- #}
   {# Each product is sold as one or more variants (a free-text label such as     #}
-  {# "10cm x 13cm" or "5ml" plus its own price/stock/sku, and optional public &  #}
+  {# "10cm x 13cm" or "5ml" plus its own price). Price is required. Stock is      #}
-  {# business sale prices). Rows are managed client-side; names are indexed       #}
+  {# optional — leave it blank ("∞") to mark the option simply available (not     #}
-  {# (variants[i][...]) and read back by the controller.                          #}
+  {# inventory-tracked). SKU and business price are optional too. Rows are        #}
+  {# managed client-side; names are indexed (variants[i][…]) and read back by     #}
+  {# the controller.                                                              #}
+  {% set opt = " (" ~ t(key="optional", lang=lang | default(value='sk')) ~ ")" %}
   <script id="variants-data" type="application/json">{{ variants | json_encode() | safe }}</script>
   <div class="space-y-3" x-data="variantEditor(JSON.parse(document.getElementById('variants-data').textContent))">
     <div class="flex items-center justify-between">
@@ -51,53 +54,50 @@
     </div>
 
     <template x-for="(row, i) in rows" :key="i">
-      <div class="grid gap-3 rounded-radius border border-outline bg-surface-alt/40 p-3 sm:grid-cols-12 dark:border-outline-dark dark:bg-surface-dark-alt/30">
+      <div class="flex items-end gap-3 rounded-radius border border-outline bg-surface-alt/40 p-3 dark:border-outline-dark dark:bg-surface-dark-alt/30">
         <input type="hidden" :name="`variants[${i}][id]`" :value="row.id">
 
-        <div class="space-y-1 sm:col-span-5">
+        {# items-end bottom-aligns every input regardless of how many lines each
-          <label class="{{ sublabel }}">{{ t(key="option-label", lang=lang | default(value='sk')) }}</label>
+           label takes, so the row stays aligned even with the "(optional)" notes. #}
+        <div class="grid flex-1 grid-cols-2 gap-3 sm:grid-cols-12 sm:items-end">
+          <div class="space-y-1 col-span-2 sm:col-span-4">
+            <label class="{{ sublabel }} block truncate">{{ t(key="option-label", lang=lang | default(value='sk')) }}{{ opt }}</label>
             <input :name="`variants[${i}][label]`" x-model="row.label" class="{{ inp }}" placeholder="napr. 10cm x 13cm">
           </div>
-        <div class="space-y-1 sm:col-span-3">
+          <div class="space-y-1 sm:col-span-2">
-          <label class="{{ sublabel }}">{{ t(key="sku", lang=lang | default(value='sk')) }}</label>
+            <label class="{{ sublabel }} block truncate">{{ t(key="sku", lang=lang | default(value='sk')) }}{{ opt }}</label>
             <input :name="`variants[${i}][sku]`" x-model="row.sku" class="{{ inp }}">
           </div>
           <div class="space-y-1 sm:col-span-2">
-          <label class="{{ sublabel }}">{{ t(key="stock", lang=lang | default(value='sk')) }}</label>
+            <label class="{{ sublabel }} block truncate">{{ t(key="stock", lang=lang | default(value='sk')) }}{{ opt }}</label>
-          <input type="number" min="0" :name="`variants[${i}][stock]`" x-model="row.stock" class="{{ inp }}">
+            <input type="number" min="0" :name="`variants[${i}][stock]`" x-model="row.stock" class="{{ inp }}" placeholder="∞" title="{{ t(key='stock-untracked-hint', lang=lang | default(value='sk')) }}">
           </div>
-        <div class="flex items-end sm:col-span-2">
+          <div class="space-y-1 sm:col-span-2">
-          <button type="button" @click="remove(i)"
+            <label class="{{ sublabel }} block truncate">{{ t(key="price", lang=lang | default(value='sk')) }}</label>
-            class="ml-auto rounded-radius px-2 py-2 text-sm text-danger hover:bg-danger/10" title="{{ t(key='delete', lang=lang | default(value='sk')) }}">✕</button>
+            <input :name="`variants[${i}][price]`" x-model="row.price" inputmode="decimal" required class="{{ inp }}" placeholder="0.00">
           </div>
-
+          <div class="space-y-1 sm:col-span-2">
-        <div class="space-y-1 sm:col-span-4">
+            <label class="{{ sublabel }} block truncate">{{ t(key="business-price", lang=lang | default(value='sk')) }}{{ opt }}</label>
-          <label class="{{ sublabel }}">{{ t(key="price", lang=lang | default(value='sk')) }}</label>
-          <input :name="`variants[${i}][price]`" x-model="row.price" inputmode="decimal" class="{{ inp }}" placeholder="0.00">
-        </div>
-        <div class="space-y-1 sm:col-span-4">
-          <label class="{{ sublabel }}">{{ t(key="sale-price", lang=lang | default(value='sk')) }}</label>
-          <input :name="`variants[${i}][sale]`" x-model="row.sale" inputmode="decimal" class="{{ inp }}" placeholder="—">
-        </div>
-        <div class="space-y-1 sm:col-span-4">
-          <label class="{{ sublabel }}">{{ t(key="business-price", lang=lang | default(value='sk')) }}</label>
             <input :name="`variants[${i}][business_sale]`" x-model="row.business_sale" inputmode="decimal" class="{{ inp }}" placeholder="—">
           </div>
         </div>
+
+        <button type="button" @click="remove(i)"
+          class="mb-1 shrink-0 rounded-radius px-2 py-2 text-sm text-danger hover:bg-danger/10" title="{{ t(key='delete', lang=lang | default(value='sk')) }}">✕</button>
+      </div>
     </template>
   </div>
 
   <script>
     function variantEditor(initial) {
-      const blank = () => ({ id: '', label: '', sku: '', stock: 0, price: '', sale: '', business_sale: '' });
+      const blank = () => ({ id: '', label: '', sku: '', stock: '', price: '', business_sale: '' });
       return {
         rows: (initial || []).map(r => ({
           id: r.id || '',
           label: r.label || '',
           sku: r.sku || '',
-          stock: (r.stock === null || r.stock === undefined) ? 0 : r.stock,
+          stock: (r.stock === null || r.stock === undefined) ? '' : r.stock,
           price: r.price || '',
-          sale: r.sale || '',
           business_sale: r.business_sale || '',
         })),
         init() { if (this.rows.length === 0) this.add(); },

assets/views/shop/_card.html

@@ -32,8 +32,8 @@
     {% if product.has_options %}
     {# Multiple variants: customer must pick on the product page. #}
     {{ ui::button(label=t(key="choose-option", lang=lang | default(value='sk')), href="/shop/" ~ product.slug, extra="w-full") }}
-    {% elif product.stock > 0 %}
+    {% elif product.in_stock %}
-    <p class="text-xs text-on-surface/60 dark:text-on-surface-dark/60">{{ t(key="in-stock", lang=lang | default(value='sk')) }}: {{ product.stock }}</p>
+    <p class="text-xs text-on-surface/60 dark:text-on-surface-dark/60">{% if product.tracked %}{{ t(key="in-stock", lang=lang | default(value='sk')) }}: {{ product.stock }}{% else %}{{ t(key="available", lang=lang | default(value='sk')) }}{% endif %}</p>
     <form method="post" action="/cart/add" hx-post="/cart/add" hx-swap="none"
       hx-on::after-request="if (event.detail.successful) toast('{{ t(key='cart-added', lang=lang | default(value='sk')) }}')">
   <input type="hidden" name="_csrf" value="{{ csrf_token() }}">

assets/views/shop/_cart_body.html

@@ -37,7 +37,7 @@
             hx-post="/cart/update" hx-trigger="cartchange" hx-target="#cart-body" hx-swap="innerHTML">
   {{ ui::csrf_field() }}
             <input type="hidden" name="variant_id" value="{{ item.id }}">
-            <input type="number" name="quantity" min="0" max="{{ item.stock }}" value="{{ item.quantity }}"
+            <input type="number" name="quantity" min="0" {% if item.stock %}max="{{ item.stock }}"{% endif %} value="{{ item.quantity }}"
               @change="
                 if (parseInt($el.value || '0') <= 0 && !window.confirm('{{ t(key='cart-remove-confirm', lang=lang | default(value='sk')) }}')) {
                   $el.value = '{{ item.quantity }}';

assets/views/shop/show.html

@@ -60,6 +60,19 @@
 
     <template x-if="current">
       <div class="space-y-6">
+        <!-- option picker (only when there's a real choice); first option is
+             selected by default and switching it updates the price + buy form -->
+        <template x-if="variants.length > 1">
+          <div class="max-w-sm space-y-1.5">
+            <label for="variant-select" class="text-sm font-medium text-on-surface-strong dark:text-on-surface-dark-strong">{{ t(key="choose-option", lang=lang | default(value='sk')) }}</label>
+            <select id="variant-select" x-model.number="sel" class="{{ fld }}">
+              <template x-for="(v, i) in variants" :key="v.id">
+                <option :value="i" x-text="(v.label || '—') + ' · ' + v.price + ' {{ product.currency }}' + (v.in_stock ? '' : ' ({{ t(key='out-of-stock', lang=lang | default(value='sk')) }})')"></option>
+              </template>
+            </select>
+          </div>
+        </template>
+
         <div class="flex items-baseline gap-3">
           <p class="text-2xl font-semibold" :class="current.on_sale ? 'text-danger' : 'text-primary dark:text-primary-dark'">
             <span x-text="current.price"></span> {{ product.currency }}
@@ -73,18 +86,6 @@
         <div class="whitespace-pre-line leading-relaxed text-on-surface/80 dark:text-on-surface-dark/80">{{ product.description }}</div>
         {% endif %}
 
-        <!-- variant picker (only when there's a real choice) -->
-        <template x-if="variants.length > 1">
-          <div class="max-w-sm space-y-1.5">
-            <label for="variant-select" class="text-sm font-medium text-on-surface-strong dark:text-on-surface-dark-strong">{{ t(key="choose-option", lang=lang | default(value='sk')) }}</label>
-            <select id="variant-select" x-model.number="sel" class="{{ fld }}">
-              <template x-for="(v, i) in variants" :key="v.id">
-                <option :value="i" x-text="(v.label || '—') + ' · ' + v.price + ' {{ product.currency }}' + (v.in_stock ? '' : ' ({{ t(key='out-of-stock', lang=lang | default(value='sk')) }})')"></option>
-              </template>
-            </select>
-          </div>
-        </template>
-
         <template x-if="current.in_stock">
           <div class="space-y-2">
             <form method="post" action="/cart/add" hx-post="/cart/add" hx-swap="none" class="flex flex-wrap items-end gap-3"
@@ -97,7 +98,14 @@
               </div>
               <button type="submit" class="{{ btn }}">{{ t(key="add-to-cart", lang=lang | default(value='sk')) }}</button>
             </form>
-            <p class="text-sm text-on-surface/60 dark:text-on-surface-dark/60">{{ t(key="in-stock", lang=lang | default(value='sk')) }}: <span x-text="current.stock"></span></p>
+            <p class="text-sm text-on-surface/60 dark:text-on-surface-dark/60">
+              <template x-if="current.tracked">
+                <span>{{ t(key="in-stock", lang=lang | default(value='sk')) }}: <span x-text="current.stock"></span></span>
+              </template>
+              <template x-if="!current.tracked">
+                <span>{{ t(key="available", lang=lang | default(value='sk')) }}</span>
+              </template>
+            </p>
           </div>
         </template>
         <template x-if="!current.in_stock">

migration/src/lib.rs

@@ -41,6 +41,7 @@ mod m20260621_000003_discount_profiles;
 mod m20260621_000004_add_business_sale_price_to_products;
 mod m20260622_000001_audience_discount_profiles;
 mod m20260622_000002_product_variants;
+mod m20260622_000003_variant_stock_nullable;
 pub struct Migrator;
 
 #[async_trait::async_trait]
@@ -86,6 +87,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260621_000004_add_business_sale_price_to_products::Migration),
             Box::new(m20260622_000001_audience_discount_profiles::Migration),
             Box::new(m20260622_000002_product_variants::Migration),
+            Box::new(m20260622_000003_variant_stock_nullable::Migration),
             // inject-above (do not remove this comment)
         ]
     }

migration/src/m20260622_000003_variant_stock_nullable.rs

@@ -0,0 +1,36 @@
+//! Make `product_variants.stock` nullable: a NULL stock means the variant is
+//! "available" but not inventory-tracked — always purchasable, no quantity cap,
+//! and never decremented on order. A numeric stock is tracked/capped as before.
+
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, m: &SchemaManager) -> Result<(), DbErr> {
+        m.get_connection()
+            .execute_unprepared(
+                r#"
+                ALTER TABLE product_variants ALTER COLUMN stock DROP DEFAULT;
+                ALTER TABLE product_variants ALTER COLUMN stock DROP NOT NULL;
+                "#,
+            )
+            .await?;
+        Ok(())
+    }
+
+    async fn down(&self, m: &SchemaManager) -> Result<(), DbErr> {
+        m.get_connection()
+            .execute_unprepared(
+                r#"
+                UPDATE product_variants SET stock = 0 WHERE stock IS NULL;
+                ALTER TABLE product_variants ALTER COLUMN stock SET DEFAULT 0;
+                ALTER TABLE product_variants ALTER COLUMN stock SET NOT NULL;
+                "#,
+            )
+            .await?;
+        Ok(())
+    }
+}

src/controllers/admin_products.rs

@@ -102,15 +102,15 @@ struct VariantInput {
     id: Option<i32>,
     label: String,
     sku: Option<String>,
-    stock: i32,
+    /// `None` = available but not inventory-tracked.
+    stock: Option<i32>,
     price_cents: i64,
-    sale_cents: Option<i64>,
     business_sale_cents: Option<i64>,
     position: i32,
 }
 
-/// An optional price field on a variant row (sale / business sale): blank means
+/// The optional business-sale price field on a variant row: blank means "no
-/// "no quick-sale", a value must parse and be below the regular price.
+/// business quick-sale", a value must parse and be below the regular price.
 fn parse_optional_sale(
     form: &MultipartForm,
     i: usize,
@@ -157,12 +157,17 @@ fn parse_variants(form: &MultipartForm) -> Result<Vec<VariantInput>> {
         }
 
         let sku = form.text(&format!("variants[{i}][sku]"));
-        let stock = form
+        // Stock is optional: blank means "available, not tracked". A value must
-            .text(&format!("variants[{i}][stock]"))
+        // be a non-negative integer.
-            .and_then(|s| s.parse::<i32>().ok())
+        let stock = match form.text(&format!("variants[{i}][stock]")) {
+            None => None,
+            Some(raw) => Some(
+                raw.parse::<i32>()
+                    .ok()
                     .filter(|n| *n >= 0)
-            .unwrap_or(0);
+                    .ok_or_else(|| Error::BadRequest("stock must be 0 or more".to_string()))?,
-        let sale_cents = parse_optional_sale(form, i, "sale", price_cents)?;
+            ),
+        };
         let business_sale_cents = parse_optional_sale(form, i, "business_sale", price_cents)?;
         let id = form
             .text(&format!("variants[{i}][id]"))
@@ -174,7 +179,6 @@ fn parse_variants(form: &MultipartForm) -> Result<Vec<VariantInput>> {
             sku,
             stock,
             price_cents,
-            sale_cents,
             business_sale_cents,
             position: out.len() as i32,
         });
@@ -193,7 +197,8 @@ fn apply_variant(active: &mut product_variants::ActiveModel, input: &VariantInpu
     active.sku = Set(input.sku.clone());
     active.stock = Set(input.stock);
     active.price_cents = Set(input.price_cents);
-    active.sale_price_cents = Set(input.sale_cents);
+    // The per-variant public sale price was removed from the UI; keep it cleared.
+    active.sale_price_cents = Set(None);
     active.business_sale_price_cents = Set(input.business_sale_cents);
     active.position = Set(input.position);
 }
@@ -252,7 +257,6 @@ fn variant_form_json(variant: &product_variants::Model) -> serde_json::Value {
         "sku": variant.sku,
         "stock": variant.stock,
         "price": format_price(variant.price_cents),
-        "sale": variant.sale_price_cents.map(format_price),
         "business_sale": variant.business_sale_price_cents.map(format_price),
     })
 }
@@ -318,12 +322,22 @@ async fn index(
         let category_name = product
             .category_id
             .and_then(|id| category_name.get(&id).cloned());
-        let total_stock: i32 = variants.iter().map(|v| v.stock).sum();
+        // Stock column: total across tracked variants, or "∞" when any option is
+        // untracked (always available).
+        let stock_display = if variants.iter().any(|v| !v.tracked()) {
+            "∞".to_string()
+        } else {
+            variants
+                .iter()
+                .filter_map(|v| v.stock)
+                .sum::<i32>()
+                .to_string()
+        };
         rows.push(product_row(
             product,
             priced,
             variants.len(),
-            total_stock,
+            stock_display,
             image,
             category_name,
         ));
@@ -352,7 +366,7 @@ fn product_row(
     product: &products::Model,
     effective: &pricing::PricedProduct,
     variant_count: usize,
-    total_stock: i32,
+    stock_display: String,
     image: Option<String>,
     category_name: Option<String>,
 ) -> serde_json::Value {
@@ -361,7 +375,7 @@ fn product_row(
         "name": product.name,
         "slug": product.slug,
         "currency": product.currency,
-        "stock": total_stock,
+        "stock": stock_display,
         "variant_count": variant_count,
         "has_options": variant_count > 1,
         "published": product.published,

src/controllers/cart.rs

@@ -97,9 +97,9 @@ async fn add(
     let mut items = parse_cart(&jar);
     let add_qty = form.quantity.unwrap_or(1).max(1);
     if let Some(entry) = items.iter_mut().find(|(id, _)| *id == variant.id) {
-        entry.1 = (entry.1 + add_qty).min(variant.stock);
+        entry.1 = variant.cap(entry.1 + add_qty);
     } else {
-        items.push((variant.id, add_qty.min(variant.stock)));
+        items.push((variant.id, variant.cap(add_qty)));
     }
     items.retain(|(_, qty)| *qty > 0);
 
@@ -128,13 +128,14 @@ async fn update(
     headers: HeaderMap,
     Form(form): Form<UpdateForm>,
 ) -> Result<Response> {
-    let stock = published_variant(&ctx, form.variant_id)
+    // Clamp the requested quantity to what's available (no cap for untracked
-        .await?
+    // variants); a removed variant clamps to 0 and drops out below.
-        .map(|(v, _)| v.stock)
+    let clamped = match published_variant(&ctx, form.variant_id).await? {
-        .unwrap_or(0);
+        Some((variant, _)) => variant.cap(form.quantity),
+        None => 0,
+    };
 
     let mut items = parse_cart(&jar);
-    let clamped = form.quantity.clamp(0, stock);
     if let Some(entry) = items.iter_mut().find(|(id, _)| *id == form.variant_id) {
         entry.1 = clamped;
     }
@@ -208,7 +209,7 @@ pub(crate) async fn resolve_cart(
         let Some((variant, product)) = published_variant(ctx, id).await? else {
             continue;
         };
-        let qty = qty.clamp(0, variant.stock);
+        let qty = variant.cap(qty);
         if qty == 0 {
             continue;
         }

src/models/_entities/product_variants.rs

@@ -14,7 +14,7 @@ pub struct Model {
     pub label: String,
     pub position: i32,
     pub sku: Option<String>,
-    pub stock: i32,
+    pub stock: Option<i32>,
     pub price_cents: i64,
     pub sale_price_cents: Option<i64>,
     pub business_sale_price_cents: Option<i64>,

src/models/orders.rs

@@ -65,12 +65,16 @@ pub async fn place(
             .one(&txn)
             .await?
             .ok_or_else(|| Error::BadRequest("a product is no longer available".to_string()))?;
-        if variant.stock < *qty {
+        // Tracked variants can't oversell; untracked ones (stock = None) are
+        // always available and never decremented.
+        if let Some(on_hand) = variant.stock {
+            if on_hand < *qty {
                 return Err(Error::BadRequest(format!(
                     "not enough stock for {}",
                     product.name
                 )));
             }
+        }
         currency = product.currency.clone();
         // Snapshot the price the buyer actually pays — public sale or, for a
         // business account, their negotiated/lowest price (same resolver the
@@ -78,9 +82,11 @@ pub async fn place(
         let unit_price_cents = pricing::price_variant(ctx, &variant, user).await?.price_cents;
         subtotal += unit_price_cents * i64::from(*qty);
 
+        if let Some(on_hand) = variant.stock {
             let mut active = variant.clone().into_active_model();
-        active.stock = Set(variant.stock - *qty);
+            active.stock = Set(Some(on_hand - *qty));
             active.update(&txn).await?;
+        }
 
         snapshots.push((product.id, variant.id, product.name, variant.label, unit_price_cents, *qty));
     }

src/models/product_variants.rs

@@ -45,6 +45,30 @@ impl Model {
     pub fn business_on_sale(&self) -> bool {
         matches!(self.business_sale_price_cents, Some(sale) if sale < self.price_cents)
     }
+
+    /// Whether the variant's inventory is tracked. A `None` stock means
+    /// "available, not tracked" (always purchasable, unlimited).
+    #[must_use]
+    pub fn tracked(&self) -> bool {
+        self.stock.is_some()
+    }
+
+    /// Whether the variant can currently be bought: untracked variants are always
+    /// available; tracked ones need a positive quantity on hand.
+    #[must_use]
+    pub fn in_stock(&self) -> bool {
+        self.stock.map_or(true, |s| s > 0)
+    }
+
+    /// Clamp a desired quantity to what's available: capped at the tracked stock,
+    /// or left as-is (only floored at 0) when untracked.
+    #[must_use]
+    pub fn cap(&self, qty: i32) -> i32 {
+        match self.stock {
+            Some(s) => qty.clamp(0, s),
+            None => qty.max(0),
+        }
+    }
 }
 
 // implement your write-oriented logic here

src/seed.rs

@@ -177,7 +177,7 @@ pub async fn seed_catalog(ctx: &AppContext) -> Result<()> {
             label: Set(String::new()),
             position: Set(0),
             sku: Set(item.sku.map(|s| s.to_string())),
-            stock: Set(item.stock),
+            stock: Set(Some(item.stock)),
             price_cents: Set(item.price_cents),
             ..Default::default()
         }

src/views/shop.rs

@@ -34,6 +34,8 @@ pub fn product_card(
         "currency": product.currency,
         "sku": representative.sku,
         "stock": representative.stock,
+        "tracked": representative.tracked(),
+        "in_stock": representative.in_stock(),
         "variant_count": variant_count,
         "has_options": variant_count > 1,
         "published": product.published,
@@ -49,7 +51,8 @@ pub fn variant_option(variant: &product_variants::Model, priced: &PricedProduct)
         "label": variant.label,
         "sku": variant.sku,
         "stock": variant.stock,
-        "in_stock": variant.stock > 0,
+        "tracked": variant.tracked(),
+        "in_stock": variant.in_stock(),
         "price": format_price(priced.price_cents),
         "on_sale": priced.is_reduced(),
         "regular_price": format_price(priced.regular_cents),