API for delete 函数不再起作用并且不会从数组中删除任何内容？

Question

当我尝试从视图中删除一个 post 时，显然显示它已被删除。但是，当我返回供应商路线时，我可以通过以下路线找到数组的所有先前成员。但是，当我在 /posts 的路线上时，不会向我显示以前删除的成员。有趣的是，刷新页面后，它不再显示我的视图记录。在以下路线中，post 在我从命令提示符尝试时消失：

/providers/553b72c9f6d0020425d37f37/posts

router.get('/providers/:provider/posts', function(req, res) {  Provider.findById(req.params.provider).select('posts').populate('posts').exec(function(err, provider) {
        if(err){ return next(err); }
        res.json(provider.posts);
    });
});

但是在这条路线中，我可以找到 posts 数组，其中包含 9 个成员。好像去掉的都不管用了

router.get('/providers', function(req, res, next) {
    Provider.find(function(err, providers){
        if(err){ return next(err); }

        res.json(providers);
    });
});

这是我在服务器端的删除函数：

router.delete('/providers/:provider/posts/:post',auth, function(req, res){
    console.log("I ma running from server")
    return Post.findById(req.params.post, function(err, post){
        return post.remove(function(err){
            if(!err){
                Post.update({_id: post.provider}, {$pull : {posts : post._id}}, function(err, numberAffected){
                    console.log(numberAffected);
                    if(!err){
                        return console.log('removed post id');
                    } else {
                        return console.log(err);
                    }
                });
                console.log('post removed');
                return res.send('');
            } else{
                console.log(err);
            }
        });
    });
});

这是我在客户端的工厂里的东西：

 ob.deletePost = function (provider_id,post_id) {
        return $http.delete(urlBase +'/providers/' + provider_id +'/posts/' + post_id ,
            {
            headers: {Authorization: 'Bearer '+auth.getToken()}
        });
    };

在控制器中：

$scope.deletePost= function (provider_id,post_id) {
        //console.log('PROVIDER',provider_id);
        // console.log('POST',post_id);
        // console.log('COMMENT',comment_id);

        providers.deletePost(provider_id,post_id)

            .success(function () {
                $scope.status = 'Deleted Post! Refreshing post list.';

                for (var i = 0; i < $scope.provider.posts.length; i++) {
                    var post = $scope.provider.posts[i];
                    // console.log(i,comment,comment_id)
                    //console.log(comment.ID);
                    if (post._id === post_id) {
                        //console.log(provider._id === provider_id)
                        // console.log(provider._id);
                        $scope.provider.posts.splice(i, 1);
                        //providers.getAllComments();
                        break;
                    }
                }
                // $scope.providers = null; // i am not sure how to write  for comment as well?

            })
            .error(function (error) {
                $scope.status = 'Unable to delete comment: ' + error.message;
            });
    };

这是我的一部分观点：

<div ng-repeat="provider in providers"> <!-- | orderBy:'-upvotes'-->
        <span class="glyphicon glyphicon-thumbs-up"
              ng-click="incrementUpvotes(provider)"></span>
        <span style="font-size:18px; margin-left:10px;">
                {{provider.upvotes}} - <strong>{{provider.name}}</strong>
          <span ng-if="provider.posts.length !== 0">
                <a ui-sref="post({provider_id : provider._id})">{{provider.posts.length}} Posts </a>
              <button class="btn btn-xs btn-info pull-right"  ng-click="modalUpdateProvider('size',provider)">Edit</button>
          </span>

从不 provider.posts.length 正在更新。要观看 提供商和 post 观看次数 ，您可以查看以下内容。谢谢。

Answer 1

我认为您在更新语句中使用了错误的模型：

router.delete('/providers/:provider/posts/:post', auth, function(req, res) {
  console.log("I ma running from server");
  // NOTE: you could also include a where clause to ensure the 
  // provider ID matches as well. This would prevent someone from using any
  // provider ID (inclduing one that doesn't exist) with a post ID.
  return Post.findById(req.params.post, function(err, post) {
    // Might want to check for an error here
    console.log('post removed');

    return post.remove(function(err) {
      if (!err) {
        //Post.update({
        Provider.update({
          _id: post.provider // or req.params.provider
        }, {
          $pull: {
            posts: post._id
          }
        }, function(err, numberAffected) {
          console.log(numberAffected);
          if (!err) {
            console.log('removed post id');
          } else {
            console.log(err);
          }
          return res.send('');
        });
      } else {
        console.log(err);
      }
    });
  });
});

此外，您可以使用 findByIdAndXXX 方法以及内置的 promise 将它们链接在一起以便于阅读：

router.delete('/providers/:provider/posts/:post', auth, function(req, res) {
  console.log("I ma running from server");
  // NOTE: you could also include a where clause to ensure the 
  // provider ID matches as well. This would prevent someone from using any
  // provider ID (inclduing one that doesn't exist) with a post ID.
  return Post.findByIdAndRemove(req.params.post).exec().then(function(post) {
    console.log('post removed');
    return Provider.findByIdAndUpdate(req.params.provider, {
        $pull: {
          posts: post._id
        }
      }, {
        new: true
      } // Return updated document
    ).exec(); // return promise to be evaluated for next handler
  }).then(function(provider) {
    console.log('removed post id');
    res.send('');
  }).then(null, function(err) {
    console.log(err);
    //might want to send a response error here
  });
});

更新：要使用 where 子句，您需要切换到 findOneAndXXX 方法：

router.delete('/providers/:provider/posts/:post', auth, function(req, res) {
  console.log("I am running from server");
  return Post.findOneAndRemove({_id: req.params.post, provider_id: req.params.provider}).exec().then(function(post) {
    console.log('post removed');
    return Provider.findByIdAndUpdate(req.params.provider, {
        $pull: {
          posts: post._id // or req.params.post
        }
      }, {
        new: true
      } // Return updated document
    ).exec(); // return promise to be evaluated for next handler
  }).then(function(provider) {
    console.log('removed post id');
    res.send('');
  }).then(null, function(err) {
    console.log(err);
    //might want to send a response error here
  });
});

API for delete 函数不再起作用并且不会从数组中删除任何内容？

API for delete function is not working anymore and doesn't remove anything from array?

api

mongoose

node.js

angularjs