較為復雜的 GraphQL 查詢實現

一、實現功能首頁各類排行榜加載數據：

向下遍歷子節點並展開；
1.展開過程中動態加載簡介summary、書類bookType；
2.book對象上包裹Rank節點，描述book對象在不同排行榜下所處位置（sort）;
3.可控制排行榜下的book數目

query getRankList($rankTypeId: ID = 1, $totalCount: Int, $withBookTypeName: Boolean = false, $withSummary: Boolean = false) {
  rankType(rankTypeId: $rankTypeId) {
    typeId
    typeName
    rankList(totalCount: $totalCount) {
      rankTypeId
      book {
        bookId
        bookName
        cover
        banner
        summary @include(if: $withSummary)
        bookType @include(if: $withBookTypeName) {
          typeName
        }
        author
      }
      sort
    }
  }
}

二、實現首頁書類展示：

1.父類及子類展展開；
2.本站對應子類下的書籍作品數目展示;
3.限制子類數目

query getBookTypeList($rootId: Int=0, $totalCount: Int=12){
  bookTypeList(parentTypeId: $rootId){
    typeId
    typeName
    children(totalCount: $totalCount){
      typeId
      typeName
      parentTypeId
      bookCount
    }
  }
}