Relations

By default, the Store API returns only the primary resource attributes to keep responses fast and lightweight. Use the expand parameter to expand related resources inline.

Including Relations

Pass a comma-separated list of relation names via the expand query parameter:

// Product with variants and media
const product = await client.products.get('spree-tote', {
  expand: ['variants', 'media'],
})

// Access included relations directly
console.log(product.variants)  // Array of variant objects
console.log(product.media)     // Array of media objects

curl -G 'http://localhost:3000/api/v3/store/products/spree-tote' \
  -H 'X-Spree-Api-Key: pk_xxx' \
  -d 'expand=variants,media'

Response Format

Without expand, relation fields are omitted from the response:

{
  "id": "prod_86Rf07xd4z",
  "name": "Spree Tote",
  "slug": "spree-tote",
  "price": { "amount": "15.99", "currency": "USD" },
  "created_at": "2025-01-15T10:30:00Z"
}

With ?expand=variants,media, the related resources are embedded:

{
  "id": "prod_86Rf07xd4z",
  "name": "Spree Tote",
  "slug": "spree-tote",
  "price": { "amount": "15.99", "currency": "USD" },
  "created_at": "2025-01-15T10:30:00Z",
  "variants": [
    {
      "id": "variant_k5nR8xLq",
      "sku": "SPR-TOTE-RED",
      "price": { "amount": "15.99", "currency": "USD" },
      "in_stock": true,
      "option_values": [{ "name": "Red", "option_type_name": "Color" }]
    }
  ],
  "media": [
    {
      "id": "asset_9xPq2wLm",
      "position": 1,
      "alt": "Spree Tote",
      "media_type": "image",
      "product_id": "prod_86Rf07xd4z",
      "variant_ids": ["variant_k5nR8xLq"],
      "original_url": "https://cdn.example.com/spree-tote.jpg",
      "small_url": "https://cdn.example.com/spree-tote-small.jpg",
      "medium_url": "https://cdn.example.com/spree-tote-medium.jpg",
      "large_url": "https://cdn.example.com/spree-tote-large.jpg"
    }
  ]
}

Available Relations by Resource

Products

Relation	Description
`variants`	All purchasable variants
`default_variant`	The default variant
`media`	All product media (images and videos across all variants)
`primary_media`	The main product image
`option_types`	Option types (e.g., Size, Color)
`categories`	Categories this product belongs to
`custom_fields`	Public custom fields (structured metadata)
`prior_price`	Previous price history (for showing strikethrough)

const product = await client.products.get('spree-tote', {
  expand: ['variants', 'media', 'option_types', 'custom_fields'],
})

curl -G 'http://localhost:3000/api/v3/store/products/spree-tote' \
  -H 'X-Spree-Api-Key: pk_xxx' \
  -d 'expand=variants,media,option_types,custom_fields'

Relation	Description
`parent`	Parent category
`ancestors`	All ancestor categories (for breadcrumbs)
`children`	Direct child categories
`custom_fields`	Public custom fields (structured metadata)

Countries

Relation	Description
`states`	States/provinces within the country

const usa = await client.countries.get('US', {
  expand: ['states'],
})
console.log(usa.states) // Array of state objects

curl -G 'http://localhost:3000/api/v3/store/countries/US' \
  -H 'X-Spree-Api-Key: pk_xxx' \
  -d 'expand=states'

Collections with Includes

The expand parameter also works on collection endpoints:

// List products with their media and default variant
const { data: products } = await client.products.list({
  expand: ['media', 'default_variant'],
  limit: 12,
})

curl -G 'http://localhost:3000/api/v3/store/products' \
  -H 'X-Spree-Api-Key: pk_xxx' \
  -d 'expand=media,default_variant' \
  -d 'limit=12'

Nested Includes

Use dot notation to include nested relations:

// Include variants and their nested option values
const product = await client.products.get('spree-tote', {
  expand: ['variants.option_values'],
})

curl -G 'http://localhost:3000/api/v3/store/products/spree-tote' \
  -H 'X-Spree-Api-Key: pk_xxx' \
  -d 'expand=variants.option_values'

Only include relations you actually need. Each included relation requires additional database queries, so requesting unnecessary relations will slow down the response.

API basics

Endpoints

Including Relations

Response Format

Available Relations by Resource

Products

Categories

Countries

Collections with Includes

Nested Includes

​Including Relations

​Response Format

​Available Relations by Resource

​Products

​Categories

​Countries

​Collections with Includes

​Nested Includes

Including Relations

Response Format

Available Relations by Resource

Products

Categories

Countries

Collections with Includes

Nested Includes