Relay API Reference - Query / Subscription

query / subscription syntax

query|subscription [<op-name>] {
  connection-object [([argument])]{
    connection-object-fields
  }
}
Key Required Schema Description
op-name false Value Name query/subscription for observability
connection-object true ConnectionObject Name of the table connection
argument false Argument One or more filter criteria, instructions for sorting order or pagination

Example: Relay Query

query {
  author_connection(first: 2){
    pageInfo {
      hasNextPage
      endCursor
    }
    edges {
      cursor
      node {
        id
        name
        username
      }
    }
  }
}

Example: Relay Subscription

subscription {
  author_connection(first: 2){
    pageInfo {
      hasNextPage
      endCursor
    }
    edges {
      cursor
      node {
        id
        name
        username
      }
    }
  }
}

Note

For details of usage, please see this page.

Syntax definitions

Connection Object

connection-object {
  pageInfo: {
    hasNextPage
    hasPreviousPage
    startCursor
    endCursor
  }
  edges: {
    cursor
    node: {
      id
      field1
      field2
      json_field[(path: String)]
      ..
      nested object1
      nested object2
      aggregate nested object1
      ..
    }
  }
}
Field Type
pageInfo PageInfo!
edges [Edge!]!

Note

For more details on the Relay connection object type, refer to the Relay docs.

PageInfo

Information useful for pagination.

type PageInfo {
  hasNextPage: Boolean!
  hasPreviousPage: Boolean!
  startCursor: String!
  endCursor: String!
}

Note

For more details on the Relay PageInfo object type, refer to the Relay docs.

Edge

Edge is an object type that consists of a cursor and node fields. node is a table object type which implements the Relay Node interface.

type tableEdge {
  cursor: String!
  node: table!
}

Cursor

The cursor field returns a unique non-null String value which is useful for pagination.

Note

For more details on the Relay cursor, refer to the Relay docs.

Argument

DistinctOnExp | WhereExp | OrderByExp | PaginationExp

DistinctOnExp

Same as the generic DistinctOnExp

WhereExp

Same as the generic WhereExp

OrderByExp

Same as the generic OrderByExp

PaginationExp

Forward Pagination:

first: Integer
[after: Cursor]

query {
  article_connection(
    first: 2
    after: "eyJpZCIgOiAzfQ=="
  ){
    pageInfo {
      startCursor
      endCursor
      hasPreviousPage
      hasNextPage
    }
    edges {
      cursor
      node {
        title
        content
        author_id
      }
    }
  }
}

Backward Pagination:

[last: Integer]
[before: Cursor]

query {
  article_connection(
    last: 2
    before: "eyJpZCIgOiA0fQ=="
  ){
    pageInfo {
      startCursor
      endCursor
      hasPreviousPage
      hasNextPage
    }
    edges {
      cursor
      node{
        title
        content
        author_id
      }
    }
  }
}
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