# MetafieldDefinitionConstraintsUpdatesInput - admin - INPUT_OBJECT
Version: 2025-01

## Description
The input fields required to update metafield definition [constraints](https://shopify.dev/apps/build/custom-data/metafields/conditional-metafield-definitions).
Each constraint applies a metafield definition to a subtype of a resource.

### Access Scopes



## Fields
* [key](/docs/api/admin/2025-01/scalars/String): String - The category of resource subtypes that the definition applies to.
If omitted and the definition is already constrained, the existing constraint key will be used.
If set to `null`, all constraints will be removed.
* [values](/docs/api/admin/2025-01/input-objects/MetafieldDefinitionConstraintValueUpdateInput): MetafieldDefinitionConstraintValueUpdateInput - The specific constraint subtype values to create or delete.


## Input objects with this input object
* [MetafieldDefinitionUpdateInput](/docs/api/admin/2025-01/input-objects/MetafieldDefinitionUpdateInput)


## Examples