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Introduction/Why AppSync
Example application
social-network
social-network/schema.graphql
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type User @aws_cognito_user_pools @aws_iam {
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	id: ID!
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	name: String!
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	avatar: String!
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	friends(nextToken: String): PaginatedUsers
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	posts(limit: Int, nextToken: String): PaginatedPosts
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}
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type Post @aws_cognito_user_pools @aws_iam {
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	id: ID!
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	author: User!
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	text: String!
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	date: AWSDateTime!
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	comments(limit: Int, nextToken: String): PaginatedComments!
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}
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type Comment @aws_cognito_user_pools @aws_iam {
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	id: ID!
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	post: Post!
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	author: User!
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	text: String!
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	date: AWSDateTime!
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}
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type PaginatedUsers @aws_cognito_user_pools @aws_iam {
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	users: [User!]!
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	nextToken: String
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}
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type PaginatedComments @aws_cognito_user_pools @aws_iam {
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	comments: [Comment!]!
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	nextToken: String
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}
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type PaginatedPosts @aws_cognito_user_pools @aws_iam {
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	posts: [Post!]!
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	nextToken: String
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}
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type Query @aws_cognito_user_pools @aws_iam {
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	currentUser: User!
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	post(id: ID!): Post
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	user(id: ID!): User
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}
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type Mutation @aws_cognito_user_pools @aws_iam {
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	createPost(userId: ID!, text: String!): Post!
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	addComment(userId: ID!, postId: ID!, text: String!): Comment!
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	notifyPost(postId: ID!): PostEvent!
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	@aws_iam
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	notifyComment(commentId: ID!): CommentEvent!
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	@aws_iam
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}
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type PostEvent @aws_cognito_user_pools @aws_iam {
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	userId: ID!
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	post: Post!
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}
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type CommentEvent @aws_cognito_user_pools @aws_iam {
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	postUserId: ID!
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	postDate: AWSDateTime!
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	comment: Comment!
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}
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type Subscription {
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	post(userId: ID!): PostEvent
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	@aws_subscribe(mutations: ["notifyPost"])
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	comment(postUserId: ID!, postDateStarting: AWSDateTime!): CommentEvent
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	@aws_subscribe(mutations: ["notifyComment"])
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}
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schema {
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	query: Query
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	mutation: Mutation
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	subscription: Subscription
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}
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