wx-parent/pages/groupbuying/groupbuying.js

import { models, db, _ } from '../../utils/cloudbase.js'
Page({
  data: {
    categoriesindex: 1,
    categories: [],
    goods: [],
    souimg: '',
    gouwucimg: '',
    pageNumber: 1,
    pageSize: 10,
    hasMore: true, // 是否还有更多数据
    isLoading: false, // 防止多次触发
    types_ids: null, // 当前选中的分类 tag_id
  },
  onLoad(options) {
    // 获取tab数据
    this.getTabdata();

    const fileIDs = [
      'cloud://cloud1-6g98iw7i28b01747.636c-cloud1-6g98iw7i28b01747-1367995226/images/icon/sou.png',
      'cloud://cloud1-6g98iw7i28b01747.636c-cloud1-6g98iw7i28b01747-1367995226/images/icon/gouwuc_img.png'
    ];
    
    // 并发下载多个 fileID
    Promise.all(
      fileIDs.map(fileID => wx.cloud.downloadFile({ fileID }))
    ).then(results => {
      // 每个 result 对应一个下载结果
      const tempFilePaths = results.map(r => r.tempFilePath);
      console.log('全部下载成功:', tempFilePaths);
      this.setData({
        souimg: tempFilePaths[0],
        gouwucimg: tempFilePaths[1]
      });
    }).catch(err => {
      console.error('有文件下载失败:', err);
    });
  },
  
  // tab数据
  async getTabdata() {
    const { data } = await models.tab.list({
      filter: {
        where: {
          position: 4, // 显示位置
        },
      },
      envType: "prod",
    });
    
    // 返回查询到的数据
    const sortedRecords = data.records.sort((a, b) => {
      return a.sort - b.sort; // 升序排列
    });
    this.setData({
      categories: sortedRecords,
      goods: [],
      pageNumber: 1,
      hasMore: true,
    }, () => {
      this.getDatalist()
    })
  },

  onReachBottom() {
    // 上拉触底事件的处理函数
    this.loadMore();
  },

  loadMore() {
    // 加载更多数据的逻辑
    console.log('加载更多');
    this.getDatalist(this.data.types_ids, true);
  },

  // 列表数据
  async getDatalist(tag_id = null, isLoadMore = false) {
  
    const userInfo = wx.getStorageSync('userInfo');
  
    // 构造 where 条件
    const where = {
      school_id: _.in(userInfo.school_id)
    };
  
    if (tag_id) {
      where.tag_id = tag_id; // 仅在 tag_id 有值时添加
    }

    const { pageNumber, pageSize } = this.data;
    const { data } = await models.wx_merchandise.list({
      filter: { where },
      pageSize,
      pageNumber,
      getCount: true,
      envType: "prod",
    });

    const collectList = data.records || [];
    this.setData({
      goods: isLoadMore ? this.data.goods.concat(collectList) : collectList, // ✅ 用 goods 拼接
      pageNumber: pageNumber + 1,
      hasMore: collectList.length === pageSize,
      isLoading: false
    });
  },

  // 点击tab分类 async
  tabcategories(e) {
    const types = e.currentTarget.dataset.type;
    const tagId = types.sort === 1 ? null : types._id;
  
    this.setData({
      categoriesindex: types.sort,
      types_ids: tagId,
      goods: [],
      pageNumber: 1,
      hasMore: true
    }, () => {
      this.getDatalist(tagId, false); // ✅ 这里也改成直接传 tagId
    });
  },

  navigateToDetail(e) {
    const index = e.currentTarget.dataset.index;
    const item = this.data.goods[index];
    wx.navigateTo({
      url: '/subpackages/productdetails/productdetails?data=' + encodeURIComponent(JSON.stringify(item))
    });
  }
});