Shopify API

This package allows Elixir developers to easily access the admin Shopify API.

Installation

The package can be installed by adding shopify to your list of dependencies in mix.exs:

def deps do
  [{:shopify, "~> 0.4"}]
end

Getting Started

The Shopify API can be accessed in two ways - either with private apps via basic auth, or with oauth.

Private Apps

Once you have a valid API key and password, setup your config/config.exs.

config :shopify, [
  shop_name: "my-shop",
  api_key: System.get_env("SHOPIFY_API_KEY"),
  password: System.get_env("SHOPIFY_API_PASSWORD")
]

We can now easily create a new API session.

Shopify.session

Alternatively, we can create a one-off session.

Shopify.session("my-shop-name", "my-api-key", "my-password")

OAuth Apps

Once you have a shopify app client ID and secret, setup your config/config.exs.

config :shopify, [
  client_id: System.get_env("SHOPIFY_CLIENT_ID"),
  client_secret: System.get_env("SHOPIFY_CLIENT_SECRET")
]

To gain access to a shop via OAuth, first, generate a permission url based on your requirments.

params = %{scope: "read_orders,read_products", redirect_uri: "http://my-redirect_uri.com/"}
permission_url = "shop-name" |> Shopify.session() |> Shopify.OAuth.permission_url(params)

After a shop has authorized access, they will be redirected to your URI above. The redirect will include a payload that contains a 'code'. We can now generate an access token.

{:ok, %Shopify.Response{data: oauth}} = "shop-name" |> Shopify.session() |> Shopify.OAuth.request_token(code)

We can now easily create a new OAuth API session.

Shopify.session("shop-name", oauth.access_token)

Making Requests

All API requests require a session struct to begin.

"shop-name" |> Shopify.session("access-token") |> Shopify.Product.find(1)

# OR

session = Shopify.session("shop-name", "access-token")
Shopify.Product.find(session, 1)

Here are some examples of the various types of requests that can be made.

# Create a session struct
session = Shopify.session("shop-name", "access-token")

# Find a resource by ID
{:ok, %Shopify.Response{data: product}} = session |> Shopify.Product.find(id)

# Find a resource and select fields
{:ok, %Shopify.Response{data: product}} = session |> Shopify.Product.find(id, %{fields: "id,images,title"})

# All resources
{:ok, %Shopify.Response{data: products}} = session |> Shopify.Product.all

# All resources with query params
{:ok, %Shopify.Response{data: products}} = session |> Shopify.Product.all(%{page: 1, limit: 5})

# Find a resource and update it
{:ok, %Shopify.Response{data: product}} = session |> Shopify.Product.find(id)
updated_product = %{product | title: "New Title"}
{:ok, response} = session |> Shopify.Product.update(product.id, updated_product)

# Update a resource without finding it
{:ok, response} = session |> Shopify.Product.update(id, %{title: "New Title"})

# Create a resource from the resource struct
new_product = %Shopify.Product{
    title: "Fancy Shirt",
    body_html: "<strong>Good shirt!<\/strong>",
    vendor: "Fancy Vendor",
    product_type: "shirt",
    variants: [
    	%{
   		price: "10.00",
    		sku: 123
   	}]
    }
{:ok, response} = session |> Shopify.Product.create(new_product)

# Create a resource from a simple map
new_product_args = %{
    title: "Fancy Shirt",
    body_html: "<strong>Good shirt!<\/strong>",
    vendor: "Fancy Vendor",
    product_type: "shirt",
    variants: [
    	%{
   		price: "10.00",
    		sku: 123
   	}]
    }
{:ok, response} = session |> Shopify.Product.create(new_product_args)

# Count resources
{:ok, %Shopify.Response{data: count}} = session |> Shopify.Product.count

# Count resources with query params
{:ok, %Shopify.Response{data: count}} = session |> Shopify.Product.count(%{vendor: "Fancy Vendor"})

# Search for resources
{:ok, %Shopify.Response{data: customers}} = session |> Shopify.Customer.search(%{query: "country:United States"})

# Delete a resource
{:ok, _} = session |> Shopify.Product.delete(id)

API Versioning

Shopify supports API versioning. By default, if you dont specify an api version, your request defaults to the oldest supported stable version.

You can specify a default version through application config.

config :shopify, [
  api_version: "2019-04"
]

You can also set a specific version per session.

Shopify.session("shop-name", "access-token") |> Shopify.Session.put_api_version("2019-04")

Handling Responses

Responses are all returned in the form of a two-item tuple. Any response that has a status code below 300 returns {:ok, response}. Codes above 300 are returned as {:error, response}.

# Create a session struct
session = Shopify.session("shop-name", "access-token")

# 'data' is returned as a %Shopify.Product struct
{:ok, %Shopify.Response{code: 200, data: data}} = session |> Shopify.Product.find(id)

# 'data' is returned as a list of %Shopify.Product structs
{:ok, %Shopify.Response{code: 200, data: data}} = session |> Shopify.Product.all

# 'message' is a text description of the error.
{:error, %Shopify.Response{code: 404, data: message}} = session |> Shopify.Product.find(1)

# Failed requests return %Shopify.Error struct
{:error, %Shopify.Error{reason: :econnrefused, source: :httpoison}} = session |> Shopify.Product.find(1)

The %Shopify.Response{} struct contains two fields: code and data. Code is the HTTP status code that is returned from Shopify. A successful request will either set the data field with a single struct, or list of structs of the resource or resources requested.

Multipass

The Multipass is available to Shopify Plus plans. It allows your non-Shopify site to be the source of truth for authentication and login. After your site has successfully authenticated a user, redirect their browser to Shopify using the special Multipass URL: this will upsert the customer data in Shopify and log them in.

Unlike other API requests, this does not require a session: it relies on a shared secret to do decryption.

Your customer data must at a minimum provide an email address and a current datetime in 8601 format.

customer_data = %{
  email: "[email protected]",
  created_at: DateTime.to_iso8601(Timex.now())
}

# From your store's checkout settings
multipass_secret = Application.get_env("MULTIPASS_SECRET")

url = Shopify.Multipass.get_url("myteststore", customer_data, multipass_secret)

# Redirect the browser immediately to the resulting URL:
"https://myteststore.myshopify.com/account/login/multipass/moaqEVx1Yu9hsvYvVpj-LeRYDtOo6ikicfTZd8tR8-xBMRg8tFjGEfllEcjj2VdbsezmT0XuEdglyQzi_biQPkfLJnP1dkxhNtfzwtt6IMQzu3W0qCPzbrUMD_gLaytPVP-zZZuYiSBqEMNdvzFg3zf0TOQHwbizX2D7It02sFI7ZpTRhfX4m_crV0b-DmmF"

Testing

For testing a mock adapter can be configured to use fixture json files instead of doing real requests.

Lets say you have a test config file in your_project/config/test.exs and tests in your_project/test you could use this configuration:

# your_project/config/test.exs
config :shopify, [
  shop_name: "test",
  api_key: "test-key",
  password: "test-paswword",
  client_secret: "test-secret",
  client_adapter: Shopify.Adapters.Mock, # Use included Mock adapter
  fixtures_path: Path.expand("../test/fixtures/shopify", __DIR__) # Use fixures in this directory
]

When using oauth, make sure the token passed is test, otherwise authentication will fail.

Shopify.session("my-shop.myshopify.com", "test")
|> Product.all()

Test Adapter

This plugin provides a test adapter called Shopify.Adapters.Mock to use out of the box. It makes certain assumptions about your fixtures and is limited to the responses provided in corresponding fixture files, and for create actions it will put the resource id as 1.

If you would like to roll your own adapter, you can do so by implementing @behaviour Shopify.Adapters.Base.

defmodule Shopify.Adapters.Mock do
  @moduledoc false

  @behaviour Shopify.Adapters.Base

  def get(%Shopify.Request{} = request) do
    data =  %{resource: %{id: 123, attribute: "attribute"}}
    {:ok,  %Shopify.Response{code: 200, data: data}}
  end

  # ...
end

Fixtures

Fixture files must follow a certain structure, so the adapter is able to find them. If your resource is Shopify.Product.all() you need to provide a file at path_you_provided_in_config/products.json and must include a valid response json

{
  "orders": [
    {
      "buyer_accepts_marketing": false,
      "cancel_reason": null,
      "cancelled_at": null,
      ...
    }
  ]
}

Or for Shopify.Product.find(1)

# path_you_provided_in_config/products/1.json
{
  "order": {
    "id": 1,
    "email": "[email protected]",
    ...
  }
}

Current Resources

Address
ApplicationCharge (find, all, create, activate)
ApplicationCredit (find, all, create)
Article (find, all, create, update, delete, count)
Article.Author (all)
Article.Tag (all)
Attribute
BillingAddress
Blog (find, all, create, update, delete, count)
CarrierService (find, all, create, update, delete)
Checkout (all, find, create, update, count, shipping_rates, complete, count)
ClientDetails
Collect (find, all, create, delete, count)
CollectionListing (find, all)
Comment (find, all, create, update, spam, not_spam, approve, remove, restore)
Country (find, all, create, update, delete, count)
Country.Province (find, all, update, count)
CustomCollection (find, all, create, update, delete, count)
Customer (find, all, create, update, delete, count, search)
CustomerAddress (find, all, create, delete)
CustomerSavedSearch (find, all, create, update, delete, count)
CustomerSavedSearch.Customer (all)
DiscountCode
DraftOrder (find, all, create, update, delete, count, complete, send_invoice) send_invoice is an alias of DraftOrder.DraftOrderInvoice.create/3
DraftOrder.DraftOrderInvoice (create)
MarketingEvent.Engagement (create_multiple)
Event (find, all, count)
Order.Fullfillment (find, all, count, create, update, complete, open, cancel)
Order.Fullfillment.Event (find, all, delete)
FulfillmentService (find, all, create, update, delete)
Image (ProductImage) (find, all, create, update, delete, count)
InventoryLevel (all, delete)
LineItem
Location (find, all, count)
MarketingEvent (find, all, count, create, update, delete, create_multiple_engagements) create_multiple_engagements is an alias of MarketingEvent.Engagement.create_multiple/3
Metafield
OAuth.AccessScope (all)
Option
Order (find, all, create, update, delete, count)
Order.Event (all)
Order.Risk (create, find, all, update, delete)
Page (create, find, all, update, delete, count)
PaymentDetails
Policy (all)
PriceRule (find, all, create, update, delete)
PriceRule.DiscountCode (find, all, create, update, delete)
Product (find, all, create, update, delete, count)
Product.Event (all)
ProductListing (find, all, create, update, delete, count, product_ids)
RecurringApplicationCharge (find, all, create, activate, delete)
Redirect (find, all, create, update, delete, count)
Refund (create, find, all)
Report (create, find, all, update, delete)
ScriptTag (find, all, create, count, delete)
ShippingAddress
ShippingLine
Shop (current)
SmartCollection (find, all, create, count, update, delete)
TaxLine
Theme (find, all, create, update, delete)
Theme.Asset (find, all, delete)
Transaction (find, all, create, count)
UsageCharge (find, all, create)
Variant (find, all, create, update, delete, count)
Webhook (find, all, create, update, delete, count)