GraphiQL温故

• 温故GraphiQL学习指南相关笔记，加深对GraphiQL基本类型、查询、突变、订阅的理解

• 结合项目实际理解对象的传递

mutation CreateReviewForEpisode($episode: Episode!, $review: ReviewInput!) {
  createReview(episode: $episode, review: $review) {
    stars
    commentary
  }
}

let review = ReviewInput(stars: 5, commentary: "This is a great movie!")
apollo.perform(mutation: CreateReviewForEpisodeMutation(episode: .jedi, review: review))

文件上传

mutation UploadFile($file:Upload!) {
    singleUpload(file:$file) {
        id
    }
}

// Create the file to upload
guard
  let fileURL = Bundle.main.url(forResource: "a", 
                                withExtension: "txt"),
  let file = GraphQLFile(fieldName: "file",   
                         originalName: "a.txt", 
                         mimeType: "text/plain", // <-defaults to "application/octet-stream"
                         fileURL: fileURL) else {
    // Either the file URL couldn't be created or the file couldn't be created.
    return 
}

// Actually upload the file
client.upload(operation: UploadFileMutation(file: "a"), // <-- `Upload` is a custom scalar that's a `String` under the hood.
              files: [file]) { result in 
  switch result {
  case .success(let graphQLResult):
    print("ID: (graphQLResult.data?.singleUpload.id)")
  case .failure(let error):
    print("error: (error)")
  }
}

• 有效上传

mutation AvatarUpload($userID: GraphQLID!, $file: Upload!) {
  id
}

• 无效上传

// Assumes AvatarObject(userID: GraphQLID, file: Upload) exists
mutation AvatarUpload($avatarObject: AvatarObject!) {
  id
}

• note:对象需要使用具体文件，如果上传文件数组需要同名，数量也得对应

• 温故GraphiQL视频

• 片段使用

query HeroAndFriends($episode: Episode) {
  hero(episode: $episode) {
    name
    ...HeroDetails
    friends {
      ...HeroDetails
    }
  }
}

fragment HeroDetails on Character {
  name
  appearsIn
}


func configure(with heroDetails: HeroDetails?) {
  textLabel?.text = heroDetails?.name
}


apollo.fetch(query: HeroAndFriendsQuery(episode: .empire)) { result in
  guard let data = try? result.get().data else { return }
  print(data.hero?.name) // Luke Skywalker
  print(data.hero?.appearsIn) // WON'T WORK
  print(data.hero?.fragments.heroDetails.appearsIn) // [.newhope, .empire, .jedi]
  print(data.hero?.friends?.flatMap { $0?.fragments.heroDetails.name }.joined(separator: ", ")) // Han Solo, Leia Organa, C-3PO, R2-D2
}


cell.configure(with: hero?.fragments.heroDetails)