如何在NodeJS Express路由器res.render中傳遞Mongoose返回變量？

Question

我已經設置了一個基本的Express NodeJS服務器。

我想將從mongoose.find（）返回的設置值保存爲res.render作爲變量，但每次它都會拋出一個錯誤Cannot read property of undefined。

這是我的routes.js文件。

var Setting = require('../../models/setting'); 

module.exports = function(app, passport) { 
app.get('/admin', function(req, res) { 
    Setting.find(function(err, setting) { 
     if (err) { 
      return res.send(500, err); 
     } 
     console.log(setting); 
     res.render('admin/customize/settings', { 
      title: 'Change Setting | eduBird', 
      user: req.user, 
      setting: res.setting 
       // setting: res.settings 
     }); 
    }); 

}); 

這是我的設置模式：

var mongoose = require('mongoose'); 

var settingSchemma = mongoose.Schema({ 
logo: { 
    logo16: String, 
    logo32: String, 
    logo96: String, 
    logo128: String, 
    logo128white: String 
} 
}); 

module.exports = mongoose.model('Setting', settingSchemma); 

這裏是在瀏覽器中的錯誤，我使用的哈巴狗視圖。

name='logo32' value=setting.logo.logo32) Cannot read property 'logo' of undefined

這是我在日誌中我的終端，注意console.log(setting)正在執行的設定權，因爲我有標誌只是一個文檔。

[nodemon] starting `node ./bin/www server` 
    Server running on port3000 
    [ { _id: 58ac45xxxx3xxxxf3, 
    __v: 0, 
    logo: 
{ logo128white: 'https://res.cloudinary.com/xxxxx/image/uplo 
    ad/xxxxx/128x128-white_aqya8e.png', 
    logo128: 'https://res.cloudinary.com/xxxxx/image/upload/v1 
    xxxxxxx/128x128_jn9dzz.png', 
    logo96: '', 
    logo32: 'https://res.cloudinary.com/xxxx/image/upload/v14 
    xxxxx/32x32_wtk3gk.png', 
    logo16: 'https://res.cloudinary.com/pinterested222/image/upload/v14 
    xxxx/16x16_o4gzhd.png' } } ] 
    GET /stylesheets/style.css 304 6.947 ms - - 

這裏是一個快照： Snapshot of the error

UPDATE

這裏是我的.pug文件的片段，我渲染，所有缺口是正確的。

  form.logoForm.z-depth-3.col.s12(method='post' action='/settings/logo') 
       .row 
        .col.s12.m8.offset-m2 
         h4.center Change Logo Settings 
         p.center Add URL for valid Logos. 
         .divider 
        .input-field.col.s12 
         input.validate#logo16(placeholder="URL for 16x16 .png log" name='logo16' value=setting.logo.logo16) 
         label.active(for='logo16') 16x16 Logo 
        .input-field.col.s12 
         input.validate#logo32(placeholder="URL for 32x32 .png log" name='logo32' value=setting.logo.logo32) 
         label.active(for='logo32') 32x32 Logo 
        .input-field.col.s12 
         input.validate#logo128(placeholder="URL for 128x128 .png log" name='logo128' value=setting.logo.logo128) 
         label.active(for='logo128') 128x128 Logo 
        .input-field.col.s12 
         input.validate#logo128white(placeholder="URL for 128x128 white .png log" name='logo128white' value=setting.logo.logo128) 
         label.active(for='logo128white') 128x128 Logo White(for dark bg) 
       .row 
        .col.s12.m4.offset-m4.l4.offset-l4 
         button.center.logoSubmit.btn.btn-large.indigo.darken-4.white-text.waves-effect.waves-light.disabled Save #[i.fa.fa-chevron-circle-right.right] 
         button.center.btn.btn-large.indigo.darken-4.white-text.waves-effect.waves-light Save #[i.fa.fa-chevron-circle-right.right] 
        .col.s12.m6.offset-m3 
         p.center(style='margin-top: .3em; padding: .2em') *You can only save the settings if any of the form fields are different/updated. 

Answer 1

您在代碼中有錯字，分配setting: res.setting是導致該問題的錯誤。另外，find()返回一組文檔，而不是單個文檔。您可能需要使用findOne()爲：

var Setting = require('../../models/setting'); 

module.exports = function(app, passport) { 
    app.get('/admin', function(req, res) { 
     Setting.findOne({}).exec(function(err, setting) { 
      if (err) { 
       return res.send(500, err); 
      } 
      console.log(setting); 
      res.render('admin/customize/settings', { 
       title: 'Change Setting | eduBird', 
       user: req.user, 
       setting: setting      
      }); 
     }); 
    }); 
}