---
title: "FacetValueChecker"
generated: true
---
<GenerationInfo sourceFile="packages/core/src/service/helpers/facet-value-checker/facet-value-checker.ts" sourceLine="53" packageName="@vendure/core" />

The FacetValueChecker is a helper class used to determine whether a given OrderLine consists
of ProductVariants containing the given FacetValues.

*Example*

```ts
import { FacetValueChecker, LanguageCode, PromotionCondition, TransactionalConnection } from '@vendure/core';

let facetValueChecker: FacetValueChecker;

export const hasFacetValues = new PromotionCondition({
  code: 'at_least_n_with_facets',
  description: [
    { languageCode: LanguageCode.en, value: 'Buy at least { minimum } products with the given facets' },
  ],
  args: {
    minimum: { type: 'int' },
    facets: { type: 'ID', list: true, ui: { component: 'facet-value-form-input' } },
  },
  init(injector) {
    facetValueChecker = injector.get(FacetValueChecker);
  },
  async check(ctx, order, args) {
    let matches = 0;
    for (const line of order.lines) {
      if (await facetValueChecker.hasFacetValues(line, args.facets)) {
          matches += line.quantity;
      }
    }
    return args.minimum <= matches;
  },
});
```

```ts title="Signature"
class FacetValueChecker implements OnModuleInit {
    constructor(connection: TransactionalConnection, cacheService: CacheService, eventBus?: EventBus)
    onModuleInit() => any;
    hasFacetValues(orderLine: OrderLine, facetValueIds: ID[], ctx?: RequestContext) => Promise<boolean>;
}
```
* Implements: OnModuleInit



<div className="members-wrapper">

### constructor

<MemberInfo kind="method" type={`(connection: <a href='/reference/typescript-api/data-access/transactional-connection#transactionalconnection'>TransactionalConnection</a>, cacheService: <a href='/reference/typescript-api/cache/cache-service#cacheservice'>CacheService</a>, eventBus?: <a href='/reference/typescript-api/events/event-bus#eventbus'>EventBus</a>) => FacetValueChecker`}   />


### onModuleInit

<MemberInfo kind="method" type={`() => any`}   />


### hasFacetValues

<MemberInfo kind="method" type={`(orderLine: <a href='/reference/typescript-api/entities/order-line#orderline'>OrderLine</a>, facetValueIds: <a href='/reference/typescript-api/common/id#id'>ID</a>[], ctx?: <a href='/reference/typescript-api/request/request-context#requestcontext'>RequestContext</a>) => `Promise<boolean>``}   />

Checks a given <DocsLink href="/reference/typescript-api/entities/order-line#orderline">OrderLine</DocsLink> against the facetValueIds and returns
`true` if the associated <DocsLink href="/reference/typescript-api/entities/product-variant#productvariant">ProductVariant</DocsLink> & <DocsLink href="/reference/typescript-api/entities/product#product">Product</DocsLink> together
have *all* the specified <DocsLink href="/reference/typescript-api/entities/facet-value#facetvalue">FacetValue</DocsLink>s.


</div>
