Mechanic
đŸ“Ŗ Shopify REST Deprecation
  • â›Šī¸Introduction
  • 🤓Hire a Mechanic developer
  • đŸ’¯status.mechanic.dev
  • đŸ“ŖShopify is deprecating the REST API
  • 🙋"I need something custom!"
  • 🧑‍đŸ’ģ"I need help with my custom task!"
  • 🤖"I need help with my AI-written task!"
  • Resources
    • âŦ‡ī¸Install Mechanic
    • 🧑‍đŸ’ģTask library
      • Contributing
      • Requesting
    • 🚀Slack community
    • 🤝Partner directory
    • 🧠Tutorials
      • Video walkthroughs
        • Auto-tag orders by originating staff member
        • Maintain a tag for orders processed today
        • Auto-tag orders with their tracking numbers
        • Sync inventory for shared SKUs
        • Auto-tag products when their SKU(s) change
        • Auto-publish new products
        • Email a report of customers who haven't ordered in X days
        • Upgrading a Mechanic task: Adding a time delay
        • Email the customer when tracking numbers are added to their order
        • Adding an optional time delay to your Mechanic task
        • Delete all orders
        • Send an email when a specific product is shipped
        • Send recurring reminders about unpaid orders
        • Send an email when a product's price goes below its cost
        • Auto-tag customers by sales channel
        • Creating products in bulk
      • Creating a Mechanic webhook
      • Practicing writing tasks
      • Triggering tasks from a contact form
      • Creating scheduled CSV feeds
      • Fetching data from a shared Google sheet
    • 🏆Converting tasks from Shopify REST to GraphQL
      • Conversion: Single resource lookups
      • Conversion: Resource loops to paginated queries
      • Conversion: Connections from a resource
      • Conversion: Metafield lookups from a resource
      • Conversion: Resource lookups in task option fields
  • Core Concepts
    • Events
      • Topics
      • Parent and child events
    • Tasks
      • Subscriptions
      • Code
        • Environment variables
        • Action objects
        • Error objects
        • Log objects
      • Options
        • Custom validation
      • Previews
        • Defining preview events
        • Stub data
      • Shopify API version
      • Advanced settings
        • Documentation
        • JavaScript
        • Perform action runs in sequence
      • Import and export
      • User Form
    • Actions
      • Cache
      • Echo
      • Email
      • Event
      • Files
      • Flow
      • FTP
      • Google Drive
      • Google Sheets
      • HTTP
      • Integrations
        • Report Toaster
      • Shopify
      • File generators
        • Base64
        • PDF
        • Plaintext
        • URL
        • ZIP
    • Runs
      • Scheduling
      • Concurrency
      • Ordering
      • Retries
    • Interacting with Shopify
      • Responding to events
        • Reconciling missing events
      • Reading data
        • âš ī¸Liquid objects
        • 🏆GraphQL in Liquid
        • Bulk operations
        • The Shopify action
      • Writing data
      • Shopify admin action links
      • API rate limit
      • API versions
  • Platform
    • 🔆Policies
      • Data
      • Plans
      • Pricing
      • Privacy
    • Cache
      • Cache endpoints
    • Email
      • Receiving email
      • Custom email addresses
      • DMARC
      • Email templates
    • Error handling
    • Events
      • Event topics
      • Event filters
    • GraphQL
      • Basics
        • Shopify Admin API GraphiQL explorer
        • Queries
        • Mutations
        • Pagination
      • Bulk operations
    • Integrations
      • Appstle Subscriptions
      • Google Drive and Google Sheets
      • Judge.me
      • Locksmith
      • Report Toaster
      • Shopify Flow
      • Run links
    • Liquid
      • Basics
        • Syntax
        • Data types
        • Variables
        • Comments
        • Filters
        • Operators
        • Control flow
          • Condition
          • Iteration
        • Whitespace
      • Liquid console
      • Mechanic filters
        • Deprecated filters
      • Mechanic keyword literals
        • array
        • hash
        • newline
      • Mechanic objects
        • Action object
        • Cache object
        • Event object
        • Options object
        • Task object
        • âš ī¸Shopify REST Admin API
          • đŸšĢArticle object
          • đŸšĢBlog object
          • đŸšĢCollection object
          • đŸšĢCustomer object
          • đŸšĢDiscount code object
          • đŸšĢDispute object
          • đŸšĢDraft order object
          • đŸšĢFulfillment object
          • đŸšĢFulfillment order object
          • đŸšĢFulfillment event object
          • đŸšĢGift card object
          • đŸšĢInventory item object
          • đŸšĢInventory level object
          • đŸšĢLine item object
          • đŸšĢLocation object
          • đŸšĢMetafields
            • Metafield object
            • Metafield representation object
            • Metafield collection object
          • đŸšĢOrder object
          • đŸšĢOrder risk object
          • đŸšĢPrice rule object
          • đŸšĢProduct object
          • đŸšĢProduct image object
          • đŸšĢRefund object
          • đŸšĢShipping zone object
          • đŸšĢShop object
          • đŸšĢTheme object
          • đŸšĢTheme asset object
          • đŸšĢTransaction object
          • đŸšĢVariant object
      • Mechanic tags
        • liquid
        • action
        • assign
        • error
        • log
      • Mechanic code snippets
    • Shopify
      • Custom authentication
      • "Read all orders"
    • Webhooks
  • Techniques
    • Preventing action loops
    • Writing a high-quality task
    • Tagging Shopify resources
    • Debouncing events
    • Responding to action results
    • Working with external APIs
      • JSON Web Signatures
      • AWS request signatures
    • Finding a resource ID
    • Migrating templates from Shopify to Mechanic
    • Securing Mechanic webhooks
    • Monitoring Mechanic
  • FAQ
    • The app isn't loading. What do I do?
    • How do I stop a large batch of runs?
    • A Shopify event is missing. Where is it?
    • Does Mechanic have an affiliate program?
    • Can non-owners install Mechanic?
    • Can I replace Shopify's order emails with Mechanic?
    • Can I manually set Shopify permissions for Mechanic?
    • Does my theme need to be updated for Mechanic?
    • Do you have a plan for development stores?
    • Why don't I see any events in my task's activity?
    • Can I read data back from my webhook submission?
    • My task added a tag, but now the tag is missing – why?
    • How do I add an unsubscribe link to my emails?
    • How do I send images with my emails?
    • Can I re-send order confirmation emails with Mechanic?
    • Why am I seeing a different price than on the app store?
    • Do you have a Partner-friendly plan?
    • Why are my tasks delayed or not running?
    • My task is failing because of a permissions problem. Why?
    • How do I preview email attachments?
    • Can I query external APIs?
    • Why can't I access the Shopify API during preview mode?
    • How do marketing preferences work with Mechanic?
    • Can I send data to Google Sheets?
    • What's possible with timeline comments?
    • I'm getting a "query param length is too long" error when using GraphQL.
    • Can my Mechanic concurrency limit be raised?
    • What IP address does Mechanic use?
    • Can Mechanic read or manage customer subscriptions?
    • Why is everything harder now?
    • Can task content be translated into multiple languages?
    • Can I add a time delay to my task?
    • Can I add another store to my existing Mechanic subscription?
    • How can I reduce memory usage of my task?
    • How do I connect PayPal to Shopify with Mechanic?
    • How do I add a Shopify access scope to my task?
    • Can I have my Mechanic data retained for more (or less) than 15 days?
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Important Updates

  • đŸ“Ŗ Shopify REST Deprecation
On this page
  • Delays
  • Offsets
  • Using Liquid
  • Examples

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  1. Core Concepts
  2. Tasks

Subscriptions

PreviousTasksNextCode

Last updated 4 months ago

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A task subscription is the expression of a task's intent to receive certain , filtering by . A subscription consists of an event topic, optionally combined with a time offset, which creates a delay.

A task may have any number of subscriptions.

Delays

... are accomplished using subscription offsets, as described below. This heading is here for folks searching for a way to delay their tasks. ;)

Offsets

Subscription offsets are appended to the subscription topic, and are of the form "+1.hour". Offsets may be given using seconds, minutes, hours, days, weeks, months, or years. There is no limit to how large the subscription offset may be.

A subscription with an offset looks like shopify/customers/create+1.hour.

In practice, large offsets can make debugging difficult! If you're thinking about work to be done weeks or months or years from now, consider running an hourly or daily task that scans for work that's due to be done, instead of scheduling tasks for the distant future.

In some cases, the first task run on a new mechanic/scheduler/daily task may not be performed when expected.

To illustrate: if a user creates a task at 9am Monday, subscribing to mechanic/scheduler/daily+10.hours, they will have to wait until the following midnight before the mechanic/scheduler/daily event is created. When that event's run is performed, the task's subscription offset will be calculated and applied, and the task run will be enqueued for 10 hours later. This means that the task will run for the first time on 10am Tuesday, not 10am Monday.

To reload the data in a Shopify variable, use something like this:

{% unless event.preview %}
  {% assign customer = customer.reload %}
{% endunless %}

Using Liquid

One subscription is permitted per line. Blank lines and leading/trailing whitespace are permitted.

Examples

shopify/orders/create

{% if options.send_email_when_order_cancelled__boolean %}
  shopify/orders/cancelled
{% endif %}
shopify/orders/paid+{{ options.days_to_wait_before_followup__number_required }}.days
shopify/customers/create{% if options.wait_one_hour__boolean %}+1.hour{% endif %}

A subscription offset (sometimes called a delay) defines the amount of time a task should wait or delay (!!) before responding to the incoming event. It's the easiest way to add a delay to a task's subscription to a specific topic. (For finer control over event timing, try using the run_at option of the .)

To learn more about scheduling work with Mechanic, see .

The available to tasks always contain data drawn from the event itself. If a task has a offset event subscription, this data may be outdated by the time the task runs.

Remember, Mechanic does not permit access to the Shopify API during . Using this unless statement ensures that reloading only happens during a live event.

A task's subscriptions are parsed for Liquid, at the time the task is saved. Combined with , this is an opportunity to generate subscriptions based on user configuration, adding or removing subscriptions based on the user's choice, or adjusting subscription offset based on a user-entered value.

Event action
Scheduling
event preview
task options
events
topic
Shopify variables