---
title: MetafieldDefinitionConstraints - GraphQL Admin
description: |-
  The [constraints](https://shopify.dev/apps/build/custom-data/metafields/conditional-metafield-definitions)
  that determine what subtypes of resources a metafield definition applies to.
api_version: 2025-10
api_name: admin
type: object
api_type: graphql
source_url:
  html: https://shopify.dev/docs/api/admin-graphql/latest/objects/MetafieldDefinitionConstraints
  md: https://shopify.dev/docs/api/admin-graphql/latest/objects/MetafieldDefinitionConstraints.md
---

# Metafield​Definition​Constraints

object

The [constraints](https://shopify.dev/apps/build/custom-data/metafields/conditional-metafield-definitions) that determine what subtypes of resources a metafield definition applies to.

## Fields

* key

  [String](https://shopify.dev/docs/api/admin-graphql/latest/scalars/String)

  The category of resource subtypes that the definition applies to.

* values

  [Metafield​Definition​Constraint​Value​Connection!](https://shopify.dev/docs/api/admin-graphql/latest/connections/MetafieldDefinitionConstraintValueConnection)

  non-null

  The specific constraint subtype values that the definition applies to.

***

## Map

### Fields with this object

* {}[MetafieldDefinition.constraints](https://shopify.dev/docs/api/admin-graphql/latest/objects/MetafieldDefinition#field-MetafieldDefinition.fields.constraints)