スキーマと GraphQL 操作

aws appsync get-introspection-schema \
  --api-id <api-id> \
  --format JSON \
  --region <region> \
  schema.json

aws appsync list-graphql-apis --region <region>

# fragments.graphql

fragment PostDetails on Post {
  id
  updatedAt
  createdAt
  title
  content
  status
  rating
  _version
  _deleted
  _lastChangedAt
}

# mutations.graphql

# Create
mutation CreatePost($input: CreatePostInput!) {
  createPost(input: $input) {
    ... PostDetails
  }
}

# Update
mutation UpdatePost($input: UpdatePostInput!) {
  updatePost(input: $input) {
    ... PostDetails
  }
}

# Delete
mutation DeletePost($input: DeletePostInput!) {
  deletePost(input: $input) {
    id
  }
}

# queries.graphql

# Single Item
query GetPost($id: ID!) {
  getPost(id: $id) {
    ... PostDetails
  }
}

# List Items
query GetPosts($nextToken: String) {
  listPosts(nextToken: $nextToken) {
    items {
      ... PostDetails
    }
    nextToken
  }
}

# subscriptions.graphql

# Create
subscription onCreateSubscription {
  onCreatePost {
    ... PostDetails
  }
}

# Update
subscription onUpdateSubscription {
  onUpdatePost {
    ... PostDetails
  }
}

# Delete
subscription onDeleteSubscription {
  onDeletePost {
    id
  }
}