Metadata File Format Reference (config v1)

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 custom 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.