Event
The Event action is for generating custom events in the User event domain. It's used to queue up follow-up work, either immediately or in the future, and can be useful when designing complex workloads, separating work between tasks.
Events generated by this action may be responded to by other tasks, or by the task that generated this action.
Option | Description |
topic | |
data | Required; any JSON value (including null), to be used as the event data |
run_at | Optional; a Unix timestamp integer, or any string that can be parsed as a time |
task_ids | Optional, cannot be used with task_id; an array of task UUID strings, specifying which tasks are allowed to respond to this event |
task_id | Optional, cannot be used with task_ids; a string containing a single task UUID, specifying which task is allowed to respond to this event |
If a
run_at value specifies a time in the past, the new event will be run immediately.Tasks specified by
task_ids or task_id must subscribe to the event topic being used. As with all subscriptions, offsets may be used, and will be respected.Liquid
JSON
{% assign data = hash %}
{% assign data["foo"] = "bar" %}
{% action "event", topic: "user/foo/bar", data: data %}
{
"action": {
"type": "event",
"options": {
"topic": "user/foo/bar",
"data": {
"foo": "bar"
}
}
}
}
Uses the optional
task_id parameter to control which singular task is allowed to respond to this event.That task must be subscribed to the event topic being used.
Liquid
JSON
{% assign data = hash %}
{% assign data["foo"] = "bar" %}
{% assign task_id = "293b7040-6689-4eb1-8b5d-64f4d33eb2ae" %}
{% comment %} For multiple tasks use `task_ids` {% endcomment %}
{% action "event", topic: "user/foo/bar", data: data, task_id: task_id %}
{
"action": {
"type": "event",
"options": {
"topic": "user/foo/bar",
"data": {
"foo": "bar"
},
"task_id": "293b7040-6689-4eb1-8b5d-64f4d33eb2ae"
}
}
}
You can limit a task to itself by referencing it's own task.id
This example uses the
run_at option to run the task at a later scheduled time.Liquid
JSON
{% assign one_day_in_seconds = 60 | times: 60 | times: 24 %}
{% action "event" %}
{
"topic": "user/foo/bar",
"task_id": {{ task.id | json }},
"run_at": {{ "now" | date: "%s" | plus: one_day_in_seconds | json }},
"data": {
"foo": "bar"
}
}
{% endaction %}
{
"action": {
"type": "event",
"options": {
"topic": "user/foo/bar",
"task_id": "293b7040-6689-4eb1-8b5d-64f4d33eb2ae",
"run_at": 1613158259,
"data": {
"foo": "bar"
}
}
}
}
This task emails a customer daily until their order is paid. It works by scheduling a follow-up run of the same task, one day in the future, using the
run_at option.Subscriptions
Code
shopify/orders/create
user/orders/unpaid_reminder
{% if event.preview %}
{% assign order = hash %}
{% assign order["id"] = 1234568790 %}
{% assign order["name"] = "#1234" %}
{% elsif event.topic == "user/orders/unpaid_reminder" %}
{% assign order = shop.orders[event.data.order_id] %}
{% endif %}
{% unless order.financial_status == "paid" %}
{% action "email" %}
{
"to": {{ order.email | json }},
"reply_to": {{ shop.customer_email | json }},
"subject": "Order {{ order.name }} still needs to be paid",
"body": "Please get in touch, stat!",
"from_display_name": {{ shop.name | json }}
}
{% endaction %}
{% assign one_day_in_seconds = 60 | times: 60 | times: 24 %}
{% action "event" %}
{
"topic": "user/orders/unpaid_reminder",
"task_id": {{ task.id | json }},
"run_at": {{ "now" | date: "%s" | plus: one_day_in_seconds | json }},
"data": {
"order_id": {{ order.id | json }}
}
}
{% endaction %}
{% endunless %}
This task emails a customer daily until their order is paid. It works by firing the follow-up event immediately, using a subscription offset to respond to it a day later.
Subscriptions
Code
shopify/orders/create
user/orders/unpaid_reminder+1.day
{% if event.preview %}
{% assign order = hash %}
{% assign order["id"] = 1234568790 %}
{% assign order["name"] = "#1234" %}
{% elsif event.topic == "user/orders/unpaid_reminder" %}
{% assign order = shop.orders[event.data.order_id] %}
{% endif %}
{% unless order.financial_status == "paid" %}
{% action "email" %}
{
"to": {{ order.email | json }},
"reply_to": {{ shop.customer_email | json }},
"subject": "Order {{ order.name }} still needs to be paid",
"body": "Please get in touch, stat!",
"from_display_name": {{ shop.name | json }}
}
{% endaction %}
{% assign one_day_in_seconds = 60 | times: 60 | times: 24 %}
{% action "event" %}
{
"topic": "user/orders/unpaid_reminder",
"task_id": {{ task.id | json }},
"data": {
"order_id": {{ order.id | json }}
}
}
{% endaction %}
{% endunless %}
Last modified 8mo ago