Metadata format reference

Introduction

With config v3, the metadata that is exported from the server by the CLI is a directory of multiple files/directories.

Note

For config v2, see Metadata format reference (config v2).

Metadata directory format

The following files will be generated in the metadata/ directory of your project:

Note

The output of the export_metadata API is a JSON version of the metadata files.

actions.graphql

The actions.graphql file contains all the action definitions and custom type definitions.

Example: A query action called greet and two custom types called SampleInput and SampleOutput.

type Query {
  greet (
    arg1: SampleInput!
  ): SampleOutput
}
input SampleInput {
  username : String!
}
type SampleOutput {
  greetings : String!
}

actions.yaml

The actions.yaml file contains metadata related to actions.

Example: An action called greet with the handler set to <base_url>/greet and two custom types called SampleInput and SampleOutput.

actions:
- name: greet
  definition:
    kind: ""
    handler: <base_url>/greet
    forward_client_headers: true
    headers:
    - value: application/json
      name: Content-Type
custom_types:
  enums: []
  input_objects:
  - name: SampleInput
  objects:
  - name: SampleOutput
  scalars: []

Example: Same example as above but with the base URL of the handler passed as an environment variable.

actions:
- name: greet
  definition:
    kind: ""
    handler: '{{ACTION_BASE_URL}}/greet'
    forward_client_headers: true
    headers:
    - value: application/json
      name: Content-Type
custom_types:
  enums: []
  input_objects:
  - name: SampleInput
  objects:
  - name: SampleOutput
  scalars: []

allow_list.yaml

The allow_list.yaml file contains the metadata related to allow lists.

Example: A query collection called allowed-queries set as the allow-list.

- collection: allowed-queries

cron_triggers.yaml

The cron_triggers.yaml file contains metadata related to cron triggers. The webhook can be an HTTP endpoint or an environment variable containing the HTTP endpoint.

Example: A cron trigger called test-trigger.

- name: test-trigger
webhook: <webhook-url>
schedule: 0 12 * * 1-5
include_in_metadata: true
payload: {}
retry_conf:
  num_retries: 1
  timeout_seconds: 60
  tolerance_seconds: 21600
  retry_interval_seconds: 10

Note

The metadata about a cron trigger will not be stored if Include this trigger in Hasura Metadata is disabled in the advanced option of events on the console or include_in_metadata is passed as false via the API.

query_collections.yaml

The query_collections.yaml file conatins metadata information about query collections.

Example: A query collection called sample-collection which contains two queries test and test2.

- name: sample-collection
  definition:
    queries:
    - name: test
      query: |-
        query test {
          books {
            id
            author_id
            title
          }
        }
    - name: test2
      query: |-
        query test2 {
            authors{
                id
                author_name
            }
        }

remote_schemas.yaml

The remote_schemas.yaml file contains the metadata related to remote schemas.

Example: A remote schema called my-remote-schema with URL <remote-schema-url>.

- name: my-remote-schema
  definition:
    url: <remote-schema-url>
    timeout_seconds: 40

Example: A remote schema called my-remote-schema with URL passed as environment variable.

- name: my-remote-schema
  definition:
    url_from_env: REMOTE_SCHEMA
    timeout_seconds: 40

version.yaml

The version.yaml file contains the metadata format version.

version: 3

databases

metadata
├── actions.graphql
├── actions.yaml
├── allow_list.yaml
├── cron_triggers.yaml
├── databases
│   ├── databases.yaml
│   └── default
│       └── tables
│           ├── public_t1.yaml
├── query_collections.yaml
├── remote_schemas.yaml
└── version.yaml

databases.yaml

- name: default
  configuration:
    connection_info:
      database_url: <database_url>
      pool_settings:
        idle_timeout: 180
        max_connections: 50
        retries: 1
  tables:
  - "!include public_t1.yaml"
  functions: []

public_t1.yaml

table:
name: t1
schema: public