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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  • đŸ“Ŗ Shopify REST Deprecation
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  • Guaranteeing run order for actions
  • Guaranteeing run order for tasks

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  1. Core Concepts
  2. Runs

Ordering

PreviousConcurrencyNextRetries

Last updated 4 years ago

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In general, Mechanic's system does not guarantee the execution order for runs that have been created at the same time (see ). This applies to all kinds of runs: events, tasks, and actions.

For tasks, the simplest way to manage this is by using subscription delays, offsetting the time at which each task is run. For example, if you have two tasks that subscribe to shopify/customers/create, you might adjust one so that it it subscribes to shopify/customers/create+10.minutes instead. This way, your first task has a chance to execute and run before the other.

This is not a perfect solution: naturally, if the first task takes more than 10 minutes to run, there will still be overlap. So, Mechanic makes

Guaranteeing run order for actions

Each task has an advanced option called "". When this is enabled, all generated actions for a given task run will be executed precisely in order.

Guaranteeing run order for tasks

The best tool to leverage here is the , coupled with action sequences (see above).

  1. Begin by making a list of the tasks for which you need to guarantee run order, sorted by the desired run order. For these purposes, all of these tasks should subscribe to the same event topic.

  2. Beginning with the task that should run first, (a) enable "Perform action runs in sequence", and (b) add an "event" action at the very end of your task script. The intent here is for this action to kick off a unique event topic that the second task should the subscribe to.

  3. Having added that "event" action, update the second task so that it subscribes to your new event topic, instead of the original event topic. If there is a third task that should follow this one, repeat step 2 for this task as well, in preparation for kicking off the third task.

  4. Repeat until you reach the final task in your list. This task does not need an "event" action at its conclusion; it only needs to have its subscription updated to listen for the penultimate task's generated event.

One more tool is worth mentioning: tasks may subscribe to mechanic/actions/perform to be re-triggered when each of their own actions are performed. For more on this strategy, see .

run
Concurrency
Perform action runs in sequence
Event action
Responding to action results