Schema/Metadata API Reference: Scheduled Triggers (Deprecated)

Deprecation

In versions v2.0.0 and above, the schema/metadata API is deprecated in favour of the schema API and the metadata API.

Though for backwards compatibility, the schema/metadata APIs will continue to function.

Introduction

Scheduled triggers are used to invoke webhooks based on a timestamp or cron.

create_cron_trigger

create_cron_trigger is used to create a new cron trigger.

POST /v1/query HTTP/1.1
Content-Type: application/json
X-Hasura-Role: admin

{
    "type" : "create_cron_trigger",
    "args" : {
        "name": "sample_cron",
        "webhook": "https://httpbin.org/post",
        "schedule":  "* * * * *",
        "payload": {
            "key1": "value1",
            "key2": "value2"
        },
        "include_in_metadata":false,
        "comment":"sample_cron commment"
    }
}

Args syntax

Key	Required	Schema	Description
name	true	TriggerName	Name of the cron trigger
webhook	true	WebhookURL	URL of the webhook
schedule	true	Cron Expression	Cron expression at which the trigger should be invoked.
payload	false	JSON	Any JSON payload which will be sent when the webhook is invoked.
headers	false	[HeaderFromValue |HeaderFromEnv ]	List of headers to be sent with the webhook
retry_conf	false	RetryConfST	Retry configuration if scheduled invocation delivery fails
include_in_metadata	true	Boolean	Flag to indicate whether a trigger should be included in the metadata. When a cron trigger is included in the metadata, the user will be able to export it when the metadata of the graphql-engine is exported.
comment	false	Text	Custom comment.
replace	false	Bool	When replace is set to true, the cron trigger will be updated(if exists) and when it's false or the field is omitted, then a new cron trigger will be created.

Supported from

Scheduled triggers are supported from versions v1.3.0 and above.

delete_cron_trigger

delete_cron_trigger is used to delete an existing cron trigger. The scheduled events associated with the cron trigger will also be deleted.

POST /v1/query HTTP/1.1
Content-Type: application/json
X-Hasura-Role: admin

{
    "type" : "delete_cron_trigger",
    "args" : {
        "name": "sample_cron"
    }
}

Args syntax

Key	Required	Schema	Description
name	true	TriggerName	Name of the cron trigger

Supported from

Scheduled triggers are supported from versions v1.3.0 and above.

create_scheduled_event

create_scheduled_event is used to create a scheduled event.

POST /v1/query HTTP/1.1
Content-Type: application/json
X-Hasura-Role: admin

{
    "type" : "create_scheduled_event",
    "args" : {
        "webhook": "https://httpbin.org/post",
        "schedule_at": "2019-09-09T22:00:00Z",
        "payload": {
            "key1": "value1",
            "key2": "value2"
        },
        "headers" : [{
            "name":"header-key",
            "value":"header-value"
        }],
        "comment":"sample scheduled event comment"
    }
}

Args syntax

Key	Required	Schema	Description
webhook	true	WebhookURL	URL of the webhook
schedule_at	true	Timestamp (ISO8601 format)	The time at which the invocation should be invoked.
payload	false	JSON	Any JSON payload which will be sent when the webhook is invoked.
headers	false	[HeaderFromValue |HeaderFromEnv ]	List of headers to be sent with the webhook
retry_conf	false	RetryConfST	Retry configuration if scheduled event delivery fails
comment	false	Text	Custom comment.

Supported from

Scheduled triggers are supported from versions v1.3.0 and above.