我有卡片模型,我有一个API,我在那里按ID查找文件。
app.post("/api/postcomment", async (req,res) => {
const data = req.body
const reqUrl = req.headers.referer
const re = new RegExp('([a-zA-Z0-9]*$)', 'i')
const fixedUrl = reqUrl.match(re)
try {
await Card.update({_id: fixedUrl}, {$push:{'comments': data}})
const card = await Card.findById(fixedUrl)
return res.json(card)
} catch (err) {
throw err
}
})
工作正常。但是现在我还有更多的模特。所有人都应该以同样的方式对待他们。但是,我如何才能使这个代码可以重用于每个模型? 或者也许有办法将我的模型名称传递给API?然后像这样使用它:
app.post("/api/postcomment", async (req,res, modelName) => {
const data = req.body
const reqUrl = req.headers.referer
const re = new RegExp('([a-zA-Z0-9]*$)', 'i')
const fixedUrl = reqUrl.match(re)
try {
await modelName.update({_id: fixedUrl}, {$push:{'comments': data}})
const item = await modelName.findById(fixedUrl)
return res.json(item )
} catch (err) {
throw err
}
})
答案 0 :(得分:0)
解决方案1:您可以创建两个辅助函数并从路由器调用。两个函数都接受模型对象:
let updateDocument = (model, fixedUrl, data) => {
return model.update({ _id: fixedUrl }, { $push: { comments: data }})
}
let getDocument = (model, fixedUrl) => {
return model.findById(fixedUrl)
}
app.post("/api/postcomment", async (req, res, modelName) => {
const data = req.body
const reqUrl = req.headers.referer
const re = new RegExp('([a-zA-Z0-9]*$)', 'i')
const fixedUrl = reqUrl.match(re)
try {
await updateDocument(Card, fixedUrl, data)
const item = await getDocument(Card, fixedUrl)
return res.json(item )
} catch (err) {
throw err
}
})
解决方案2:更好的解决方案是创建具有通用功能的基类(服务)。并为每个模型扩展它:
class BaseService {
constructor(model) {
this.model = model;
}
getDocument(data) {
return this.model.findOne(...);
}
updateDocument(data) {
return this.model.update(...);
}
}
class CardService extends BaseService {
constuctor() {
super(Card);
}
}