variantUpdate

Required scope: edit_products

Update fields on an existing variant. Only the fields provided in the input will be modified.

CMS source restriction

Variants with source: CMS can only be updated by the same OAuth client that originally created them.

---

Mutation

mutation VariantUpdate($input: VariantInput!) {
  variantUpdate(input: $input) {
    id
    sku
    title
    weight
    weightUnit
  }
}

Input — VariantInput

Field	Type	Required	Description
organizationId	String	✅	Organization UUID
productId	String	❌	Parent product ID
sku	String	❌	Updated SKU (must remain unique within organization)
title	String	❌	Updated variant label
status	ProductStatusEnum	❌	Updated status (prefer dedicated lifecycle mutations)
model	ProductModelEnum	❌	Updated model (prefer variantChangeModel)
weight	Float	❌	Updated weight value
weightUnit	WeightUnitEnum	❌	G, KG, LB, or OZ
height	Float	❌	Updated height
width	Float	❌	Updated width
length	Float	❌	Updated length
distanceUnit	DistanceUnitEnum	❌	CM or IN
barcode	String	❌	Updated barcode
originCountry	String	❌	Updated ISO country code
hsCode	String	❌	Updated HS tariff code

---

Example

Variables

{
  "input": {
    "organizationId": "org_123",
    "weight": 210,
    "weightUnit": "G",
    "height": 32,
    "width": 26,
    "length": 5,
    "distanceUnit": "CM"
  }
}

Response

{
  "data": {
    "variantUpdate": {
      "id": "var_001",
      "sku": "TSHIRT-S-BLUE",
      "title": "Small / Blue",
      "weight": 210,
      "weightUnit": "G"
    }
  }
}

---

Code Examples

curl

curl -X POST https://api-v3.happycolis.com/graphql \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "query": "mutation VariantUpdate($input: VariantInput!) { variantUpdate(input: $input) { id sku title weight weightUnit } }",
    "variables": {
      "input": {
        "organizationId": "org_123",
        "weight": 210,
        "weightUnit": "G",
        "height": 32,
        "width": 26,
        "length": 5,
        "distanceUnit": "CM"
      }
    }
  }'

Node.js

async function updateVariant(accessToken, variantData) {
  const response = await fetch('https://api-v3.happycolis.com/graphql', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${accessToken}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query: `
        mutation VariantUpdate($input: VariantInput!) {
          variantUpdate(input: $input) {
            id
            sku
            title
            weight
            weightUnit
          }
        }
      `,
      variables: { input: variantData },
    }),
  });

  const { data, errors } = await response.json();
  if (errors) throw new Error(errors[0].message);
  return data.variantUpdate;
}

// Usage
const variant = await updateVariant(accessToken, {
  organizationId: 'org_123',
  weight: 210,
  weightUnit: 'G',
  height: 32,
  width: 26,
  length: 5,
  distanceUnit: 'CM',
});

Python

import requests

def update_variant(access_token, variant_data):
    response = requests.post(
        'https://api-v3.happycolis.com/graphql',
        headers={
            'Authorization': f'Bearer {access_token}',
            'Content-Type': 'application/json',
        },
        json={
            'query': '''
                mutation VariantUpdate($input: VariantInput!) {
                    variantUpdate(input: $input) {
                        id
                        sku
                        title
                        weight
                        weightUnit
                    }
                }
            ''',
            'variables': {'input': variant_data},
        },
    )
    result = response.json()
    if 'errors' in result:
        raise Exception(result['errors'][0]['message'])
    return result['data']['variantUpdate']

# Usage
variant = update_variant(access_token, {
    'organizationId': 'org_123',
    'weight': 210,
    'weightUnit': 'G',
    'height': 32,
    'width': 26,
    'length': 5,
    'distanceUnit': 'CM',
})

PHP

function updateVariant(string $accessToken, array $variantData): array
{
    $client = new \GuzzleHttp\Client();

    $response = $client->post('https://api-v3.happycolis.com/graphql', [
        'headers' => [
            'Authorization' => 'Bearer ' . $accessToken,
            'Content-Type'  => 'application/json',
        ],
        'json' => [
            'query' => '
                mutation VariantUpdate($input: VariantInput!) {
                    variantUpdate(input: $input) {
                        id
                        sku
                        title
                        weight
                        weightUnit
                    }
                }
            ',
            'variables' => ['input' => $variantData],
        ],
    ]);

    $result = json_decode($response->getBody()->getContents(), true);
    if (isset($result['errors'])) {
        throw new \Exception($result['errors'][0]['message']);
    }
    return $result['data']['variantUpdate'];
}

// Usage
$variant = updateVariant($accessToken, [
    'organizationId' => 'org_123',
    'weight'         => 210,
    'weightUnit'     => 'G',
    'height'         => 32,
    'width'          => 26,
    'length'         => 5,
    'distanceUnit'   => 'CM',
]);

Go

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "net/http"
)

type VariantUpdateInput struct {
    OrganizationID string   `json:"organizationId"`
    SKU            string   `json:"sku,omitempty"`
    Title          string   `json:"title,omitempty"`
    Weight         *float64 `json:"weight,omitempty"`
    WeightUnit     string   `json:"weightUnit,omitempty"`
    Height         *float64 `json:"height,omitempty"`
    Width          *float64 `json:"width,omitempty"`
    Length         *float64 `json:"length,omitempty"`
    DistanceUnit   string   `json:"distanceUnit,omitempty"`
    Barcode        string   `json:"barcode,omitempty"`
    OriginCountry  string   `json:"originCountry,omitempty"`
    HsCode         string   `json:"hsCode,omitempty"`
}

func updateVariant(accessToken string, input VariantUpdateInput) (map[string]interface{}, error) {
    query := `
        mutation VariantUpdate($input: VariantInput!) {
            variantUpdate(input: $input) {
                id
                sku
                title
                weight
                weightUnit
            }
        }
    `

    body, _ := json.Marshal(map[string]interface{}{
        "query":     query,
        "variables": map[string]interface{}{"input": input},
    })

    req, _ := http.NewRequest("POST", "https://api-v3.happycolis.com/graphql", bytes.NewBuffer(body))
    req.Header.Set("Authorization", "Bearer "+accessToken)
    req.Header.Set("Content-Type", "application/json")

    resp, err := http.DefaultClient.Do(req)
    if err != nil {
        return nil, err
    }
    defer resp.Body.Close()

    var result map[string]interface{}
    json.NewDecoder(resp.Body).Decode(&result)

    if errs, ok := result["errors"]; ok {
        return nil, fmt.Errorf("graphql error: %v", errs)
    }
    data := result["data"].(map[string]interface{})
    return data["variantUpdate"].(map[string]interface{}), nil
}