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medusa-store/www/apps/resources/app/commerce-modules/promotion/application-method/page.mdx
Shahed Nasser 0462cc5acf docs: updates to use DML and other changes (#7834)
- Change existing data model guides and add new ones for DML
- Change module's docs around service factory + remove guides that are now necessary
- Hide/remove all mentions of module relationships, or label them as coming soon.
- Change all data model creation snippets to use DML
- use `property` instead of `field` when referring to a data model's properties.
- Fix all snippets in commerce module guides to use new method suffix (no more main model methods)
- Rework recipes, removing/hiding a lot of sections as a lot of recipes are incomplete with the current state of DML.


### Other changes

- Highlight fixes in some guides
- Remove feature flags guide
- Fix code block styles when there are no line numbers.

### Upcoming changes in other PRs

- Re-generate commerce module references (for the updates in the method names)
- Ensure that the data model references are generated correctly for models using DML.
- (probably at a very later point) revisit recipes
2024-06-26 07:55:59 +00:00

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import { Table } from "docs-ui"
export const metadata = {
title: `Application Method`,
}
# {metadata.title}
In this document, you'll learn what an application method is.
## What is an Application Method?
The [ApplicationMethod data model](/references/promotion/models/ApplicationMethod) defines how a promotion is applied:
<Table>
<Table.Header>
<Table.Row>
<Table.HeaderCell>
Property
</Table.HeaderCell>
<Table.HeaderCell>
Purpose
</Table.HeaderCell>
</Table.Row>
</Table.Header>
<Table.Body>
<Table.Row>
<Table.Cell>
`type`
</Table.Cell>
<Table.Cell>
Does the promotion discount a fixed amount or a percentage?
</Table.Cell>
</Table.Row>
<Table.Row>
<Table.Cell>
`target_type`
</Table.Cell>
<Table.Cell>
Is the promotion applied on a cart item, shipping method, or the entire order?
</Table.Cell>
</Table.Row>
<Table.Row>
<Table.Cell>
`allocation`
</Table.Cell>
<Table.Cell>
Is the discounted amount applied on each item or split between the applicable items?
</Table.Cell>
</Table.Row>
</Table.Body>
</Table>
## Target Promotion Rules
When the promotion is applied to a cart item or a shipping method, you can restrict which items/shipping methods the promotion is applied to.
The `ApplicationMethod` data model has a collection of `PromotionRule` records to restrict which items or shipping methods the promotion applies to. The `target_rules` property represents this relation.
![A diagram showcasing the target_rules relation between the ApplicationMethod and PromotionRule data models](https://res.cloudinary.com/dza7lstvk/image/upload/v1709898273/Medusa%20Resources/application-method-target-rules_hqaymz.jpg)
In this example, the promotion is only applied on products in the cart having the SKU `SHIRT`.
---
## Buy Promotion Rules
When the promotions type is `buyget`, you must specify the “buy X” condition. For example, a cart must have two shirts before the promotion can be applied.
The application method has a collection of `PromotionRule` items to define the “buy X” rule. The `buy_rules` property represents this relation.
![A diagram showcasing the buy_rules relation between the ApplicationMethod and PromotionRule data models](https://res.cloudinary.com/dza7lstvk/image/upload/v1709898453/Medusa%20Resources/application-method-buy-rules_djjuhw.jpg)
In this example, the cart must have two products with the SKU `SHIRT` for the promotion to be applied.