tiyan 发表于 2017-12-15 07:03:31

nodejs+express+mongodb搭建博客

var express = require('express');  

var router = express.Router();  

  

var PostModel = require('../models/posts');  

var CommentModel = require('../models/comments');  

var checkLogin = require('../middlewares/check').checkLogin;  

  

// GET /posts 所有用户或者特定用户的文章页  
//
   eg: GET /posts?author=xxx  
router.get('/', function(req, res, next) {
  var author = req.query.author;
  

  PostModel.getPosts(author)
  .then(function (posts) {
  res.render('posts', {
  posts: posts
  });
  })
  .catch(next);
  
});
  

  
// GET /posts/create 发表文章页
  
router.get('/create', checkLogin, function(req, res, next) {
  res.render('create');
  
});
  

  
// POST /posts 发表一篇文章
  
router.post('/', checkLogin, function(req, res, next) {
  var author = req.session.user._id;

  var>  var content = req.fields.content;
  

  // 校验参数
  try {
  if (!title.length) {
  throw new Error('请填写标题');
  }
  if (!content.length) {
  throw new Error('请填写内容');
  }
  } catch (e) {
  req.flash('error', e.message);
  return res.redirect('back');
  }
  

  var post = {
  author: author,

  title:>  content: content,
  pv: 0
  };
  

  PostModel.create(post)
  .then(function (result) {
  // 此 post 是插入 mongodb 后的值,包含 _id
  post = result.ops;
  req.flash('success', '发表成功');
  // 发表成功后跳转到该文章页
  res.redirect(`/posts/${post._id}`);
  })
  .catch(next);
  
});
  

  
// GET /posts/:postId 单独一篇的文章页
  
router.get('/:postId', function(req, res, next) {
  var postId = req.params.postId;
  Promise.all([
  PostModel.getPostById(postId),// 获取文章信息
  CommentModel.getComments(postId),// 获取该文章所有留言
  PostModel.incPv(postId)// pv 加 1
  
])
  .then(function (result) {
  var post = result;
  var comments = result;
  if (!post) {
  throw new Error('该文章不存在');
  }
  

  res.render('post', {
  post: post,
  comments: comments
  });
  })
  .catch(next);
  
});
  

  
// GET /posts/:postId/edit 更新文章页
  
router.get('/:postId/edit', checkLogin, function(req, res, next) {
  var postId = req.params.postId;
  var author = req.session.user._id;
  

  PostModel.getRawPostById(postId)
  .then(function (post) {
  if (!post) {
  throw new Error('该文章不存在');
  }
  if (author.toString() !== post.author._id.toString()) {
  throw new Error('权限不足');
  }
  res.render('edit', {
  post: post
  });
  })
  .catch(next);
  
});
  

  
// POST /posts/:postId/edit 更新一篇文章
  
router.post('/:postId/edit', checkLogin, function(req, res, next) {
  var postId = req.params.postId;
  var author = req.session.user._id;

  var>  var content = req.fields.content;
  


  PostModel.updatePostById(postId, author, {>  .then(function () {
  req.flash('success', '编辑文章成功');
  // 编辑成功后跳转到上一页
  res.redirect(`/posts/${postId}`);
  })
  .catch(next);
  
});
  

  
// GET /posts/:postId/remove 删除一篇文章
  
router.get('/:postId/remove', checkLogin, function(req, res, next) {
  var postId = req.params.postId;
  var author = req.session.user._id;
  

  PostModel.delPostById(postId, author)
  .then(function () {
  req.flash('success', '删除文章成功');
  // 删除成功后跳转到主页
  res.redirect('/posts');
  })
  .catch(next);
  
});
  

  
// POST /posts/:postId/comment 创建一条留言
  
router.post('/:postId/comment', checkLogin, function(req, res, next) {
  var author = req.session.user._id;
  var postId = req.params.postId;
  var content = req.fields.content;
  var comment = {
  author: author,
  postId: postId,
  content: content
  };
  

  CommentModel.create(comment)
  .then(function () {
  req.flash('success', '留言成功');
  // 留言成功后跳转到上一页
  res.redirect('back');
  })
  .catch(next);
  
});
  

  
// GET /posts/:postId/comment/:commentId/remove 删除一条留言
  
router.get('/:postId/comment/:commentId/remove', checkLogin, function(req, res, next) {
  var commentId = req.params.commentId;
  var author = req.session.user._id;
  

  CommentModel.delCommentById(commentId, author)
  .then(function () {
  req.flash('success', '删除留言成功');
  // 删除成功后跳转到上一页
  res.redirect('back');
  })
  .catch(next);
  
});
  

  
module.exports = router;
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