Chuẩn bị

aws cloudformation create-stack \
    --stack-name AWSAppSyncTutorialForAmazonDynamoDB \
    --template-url https://s3.us-west-2.amazonaws.com/awsappsync/resources/dynamodb/AmazonDynamoDBCFTemplate.yaml \
    --capabilities CAPABILITY_NAMED_IAM

schema {
    query: Query
    mutation: Mutation
}

type Query {
    getPost(id: ID): Post
}

type Mutation {
    addPost(
        id: ID!
        author: String!
        title: String!
        content: String!
        url: String!
    ): Post!
}

type Post {
    id: ID!
    author: String
    title: String
    content: String
    url: String
    ups: Int!
    downs: Int!
    version: Int!
}