(Ruby) Shopify Set inventory levels to a certain amount

Use the set endpoint with the location ID and inventory item ID to set an inventory level to a specific value.

For more information, see https://shopify.dev/tutorials/manage-product-inventory-with-admin-api#update-inventory-levels-for-a-product-variant

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

http = Chilkat::CkHttp.new()

http.put_Login("SHOPIFY_PRIVATE_API_KEY")
http.put_Password("SHOPIFY_PRIVATE_API_KEY")

# Also see: How to retrieve inventory levels

http.put_Accept("application/json")

# The following JSON is sent in the request body:

# {
#   "location_id": 6884556842,
#   "inventory_item_id": 12250274365496,
#   "available": 1
# }

# Use this online tool to generate the code from sample JSON: 
# Generate Code to Create JSON

jsonRequestBody = Chilkat::CkJsonObject.new()
jsonRequestBody.UpdateInt("location_id",6884556842)
jsonRequestBody.UpdateInt("inventory_item_id",12250274365496)
jsonRequestBody.UpdateInt("available",1)

url = "https://{shop}.myshopify.com/admin/api/2020-04/inventory_levels/set.json"

# resp is a CkHttpResponse
resp = http.PText("POST",url,jsonRequestBody.emit(),"utf-8","application/json",false,false)
if (http.get_LastMethodSuccess() != true)
    print http.lastErrorText() + "\n";
    exit
end

print "Response Status Code: " + resp.get_StatusCode().to_s() + "\n";

jsonResponse = Chilkat::CkJsonObject.new()
jsonResponse.Load(resp.bodyStr())
jsonResponse.put_EmitCompact(false)
print jsonResponse.emit() + "\n";

if (resp.get_StatusCode() >= 300)
    print "Failed." + "\n";

    exit
end

# Sample output...
# (See the parsing code below..)
# 
# Use the this online tool to generate parsing code from sample JSON: 
# Generate Parsing Code from JSON

# {
#   "inventory_level": {
#     "inventory_item_id": 12250274365496,
#     "location_id": 6884556842,
#     "available": 1,
#     "updated_at": "2018-06-26T15:44:33-04:00",
# ...
#     "admin_graphql_api_id": "gid://shopify/InventoryLevel/6485147690?inventory_item_id=12250274365496"
# ...
#   }
# }
# 

inventory_levelInventory_item_id = jsonResponse.IntOf("inventory_level.inventory_item_id")
inventory_levelLocation_id = jsonResponse.IntOf("inventory_level.location_id")
inventory_levelAvailable = jsonResponse.IntOf("inventory_level.available")
inventory_levelUpdated_at = jsonResponse.stringOf("inventory_level.updated_at")
inventory_levelAdmin_graphql_api_id = jsonResponse.stringOf("inventory_level.admin_graphql_api_id")