这是我的路由器:reportRoutes.route('/:id').get(async (req, res) => { try{ let id = req.params.id console.log(req.query) let team = req.query.team let league_acronym = req.query.league console.log('team',team) let regex = new RegExp( id, 'i') const report = await Report.find({ title: regex }) .populate({path: 'like'}) .populate({ path: 'player', populate: [{ path: 'team' }, { path: 'team', populate: { path: 'league' } } ] }) if(league_acronym) { newReport = report.filter((v,i) => { return v.player.team.league.acronym === league_acronym && v.player.team.team_name === team }) res.json(newReport) } else{ res.json(report) } } catch (e) { res.status(500).send() }})我正在尝试设置一个通过报告并返回 newReport 的过滤器。它将过滤的条件基于查询字符串参数。因为查询字符串参数并不总是存在,所以我需要一种方法来过滤条件,仅当条件存在时。想法?
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