code: function tombstoneQuery(name, query, opts) {
      const tombstoneKey = opts && (typeof opts.tombstoneKeyGetter === 'function') ? opts.tombstoneKeyGetter(name) : null;
      if (!tombstoneKey) return query;
  
      const cond = { [tombstoneKey]: { $ne: true } };
      if (query._conditions.$and && Array.isArray(query._conditions.$and)) {
          query._conditions.$and.push(cond);
      } else {
          Object.assign(query._conditions, cond);
      }
      return query;
  }
docs: 逻辑删除情况下加工查询对象
  @param {Object} name - 模型名称
  @param {Object} query - 查询对象
  @param {Object} opts - 适配器配置