Metadata file format reference (config v1)

Table of contents

Introduction

The metadata file that is exported from the server is a JSON/YAML representation of the Hasura metadata stored in the hdb_catalog schema on the Postgres database.

The top level keys will be the following arrays:

functions: []
remote_schemas: []
tables: []

Depending on the tables tracked, remote schemas and functions created, these keys will have elements inside them.

The table will have permission rules, relationships and event triggers defined for each table. Here is an example metadata file:

metadata.yaml

functions:
- search_articles
remote_schemas:
- comment: null
  definition:
    forward_client_headers: false
    headers: []
    url: https://graphql-pokemon.now.sh/graphql
    url_from_env: null
  name: pokemon
tables:
- table: author
  array_relationships:
  - comment: null
    name: articlesByauthorId
    using:
      foreign_key_constraint_on:
        column: author_id
        table: article
  delete_permissions: []
  event_triggers: []
  insert_permissions:
  - comment: null
    permission:
      check:
        id:
          _eq: X-Hasura-User-Id
      columns:
      - name
      set: {}
    role: user
  object_relationships: []
  select_permissions:
  - comment: null
    permission:
      allow_aggregations: false
      columns:
      - id
      - name
      filter:
        id:
          _eq: X-Hasura-User-Id
    role: user
  update_permissions: []
- table: article
  array_relationships: []
  delete_permissions: []
  event_triggers:
  - definition:
      delete:
        columns: '*'
      insert:
        columns: '*'
      update:
        columns:
        - id
        - title
        - author_id
    headers: []
    name: update_article_search_index
    retry_conf:
      interval_sec: 10
      num_retries: 0
      timeout_sec: 60
    webhook: https://my-algolia-api.com/update_index
  insert_permissions:
  - comment: null
    permission:
      check:
        author_id:
          _eq: X-Hasura-User-Id
      columns:
      - title
      set:
        author_id: x-hasura-user-id
    role: user
  object_relationships:
  - comment: null
    name: authorByauthorId
    using:
      foreign_key_constraint_on: author_id
  select_permissions:
  - comment: null
    permission:
      allow_aggregations: true
      columns:
      - author_id
      - id
      - title
      filter:
        author_id:
          _eq: X-Hasura-User-Id
    role: user
  update_permissions: []

The schema for this file will mostly correspond to the table structure of the metadata catalogue.

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