We're now in the second week of the #4WeeksOfShopifyDev challenge.

In the sixth article, As requested, I'll be talking about how to set price rules by a product variant id for a specific quantity using the Shopify GraphQl API

We'll build a discount (80% OFF) that will be applied automatically when the user has a specific product variant with a minimum quantity of 2 itemsLet do it!

I'll be using the Shopify Admin API explorer app

• You need to install the Shopify Admin API app
• Paste this code in GraphQl query

mutation discountAutomaticBasicCreate($automaticBasicDiscount: DiscountAutomaticBasicInput!) {
  discountAutomaticBasicCreate(automaticBasicDiscount: $automaticBasicDiscount) {
    automaticDiscountNode {
      id
    }
    userErrors {
      code
      extraInfo
      field
      message
    }
  }
}

In this code, we have this mutation function to creates a basic automatic discount and it's will return the id of the generated discount

• Paste this JSON object in the query variables section

{
  "automaticBasicDiscount": {
    "title": "Ilias Challenge",
    "startsAt": "2020-12-07T11:26:29.519Z",
    "minimumRequirement": {
      "quantity": {
        "greaterThanOrEqualToQuantity": "2"
      }
    },
    "customerGets": {
      "value": {
        "percentage": 0.8
      },
      "items": {
        "products": {
          "productVariantsToAdd": "gid://shopify/ProductVariant/YOUR-PRODUCT-VARIANT-ID"
        }
      }
    }
  }
}

Notes:

Percentage accepts value between 0.00 - 1.00 80% - 0.80

Your Product Variant ID: you can get it when editing a product variant, you'll have in the URL

In this example:

https://ilias-demo.myshopify.com/admin/products/4805542674516/variants/32963135799380

Variant_ID= 32963135799380

You can also checkout this screen cast video of how I create the discount