较为复杂的 GraphQL 查询实现

一、实现功能首页各类排行榜加载数据：

向下遍历子节点并展开；
1.展开过程中动态加载简介summary、书类bookType；
2.book对象上包裹Rank节点，描述book对象在不同排行榜下所处位置（sort）;
3.可控制排行榜下的book数目

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、实现首页书类展示：

1.父类及子类展展开；
2.本站对应子类下的书籍作品数目展示;
3.限制子类数目

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