Add a custom bundle

In this tutorial, you'll learn how to do the following tasks:

• Use GraphQL to define the input of your function.
• Build a cart_transform function.

• You've created a Partner account.
• You've created a development store.
• You've created an app that uses Shopify CLI 3.0 or higher, or you've migrated your existing app so that it's compatible with Shopify CLI 3.0 or higher.
• You've installed your app on the development store.

The following requirements are specific to Rust-based development with Shopify Functions.

• You've installed Rust.

  On Windows, Rust requires the Microsoft C++ Build Tools. Make sure to select the Desktop development with C++ workload when installing the tools.

• You've installed cargo-wasi:

The following example shows how to use the cartTransform mutation to group specific line items from the cart together into a bundled line. The lines might be repriced to offer customers an incentive to purchase a complete bundle.

The process to build a cart_transform function is similar to the process to create a discount function, with two key differences:

• You need to skip the discount React library and related discount React UI code.

• You need to create a cart_transform function instead of a product_discounts function:

In the following example, a metafield reference is used to assign mappings between the bundle parent and components:

• Learn how to build a user interface for bundles in the Shopify admin.
• Learn how to use variables in your input query.