Angularjs Can'；t在发送后设置标题-通过NodeJs发布新用户
我正在尝试使用googlemapsapi、NodeJs、Express、MongoDB、Mongoose和AngularJS构建一个应用程序，而我面临的一个问题是，我无法通过查看其他相关的SO Q/a来解决 基本上，我正试图Angularjs Can'；t在发送后设置标题-通过NodeJs发布新用户,angularjs,node.js,mongodb,express,mongoose,Angularjs,Node.js,Mongodb,Express,Mongoose,我正在尝试使用googlemapsapi、NodeJs、Express、MongoDB、Mongoose和AngularJS构建一个应用程序，而我面临的一个问题是，我无法通过查看其他相关的SO Q/a来解决 基本上，我正试图将发布到我的数据库用户中，这些用户由用户名和[纬度，经度]标识，他们提交了我视图中的某个表单 当我尝试直接从应用程序（如Postman中发布用户时，一切正常，我可以在数据库中看到新用户 相反，当我尝试在用户提交时直接发布他们时，我会在我的控制台中得到以下错误： /node_m
将发布到我的数据库用户中，这些用户由用户名
和[纬度，经度]
标识，他们提交了我视图中的某个表单
当我尝试直接从应用程序（如Postman中发布用户时，一切正常，我可以在数据库中看到新用户
相反，当我尝试在用户提交时直接发布他们时，我会在我的控制台中得到以下错误：
/node_modules/mongodb-core/lib/topologies/server.js:766
catch(err) { process.nextTick(function() { throw err}); }
^
Error: Can't set headers after they are sent.
angular.js:10695 GET http://localhost:3000/users net::ERR_CONNECTION_REFUSED
<form name="addForm" novalidate>
<div class="form-group">
<label for="username">Username
<span class="badge">All fields required</span>
</label>
<input type="text" class="form-control" id="username"
placeholder="OldandGold" ng-model="formData.username" required>
</div>
<div class="form-group">
<label for="latitude">Latitude</label>
<input type="text" class="form-control" id="latitude"
value="39.500" ng-model="formData.latitude" readonly>
</div>
<div class="form-group">
<label for="longitude">Longitude</label>
<input type="text" class="form-control" id="longitude"
value="-98.350" ng-model="formData.longitude" readonly>
</div>
<button type="submit" class="btn btn-danger btn-block"
ng-click="createUser()" ng-disabled="addForm.$invalid">Submit</button>
</form>
// Pulls Mongoose dependency for creating schemas
var mongoose = require('mongoose');
var GeoJSON = require('geojson');
var Schema = mongoose.Schema;
var LocationSchema = new Schema({
name: {type: String, required: true},
location: {
type: {type : String, required: true},
coordinates : [Schema.Types.Mixed]
},
created_at: {type: Date, default: Date.now},
updated_at: {type: Date, default: Date.now}
});
// Sets the created_at parameter equal to the current time
LocationSchema.pre('save', function(next){
now = new Date();
this.updated_at = now;
if(!this.created_at) {
this.created_at = now
}
next();
});
// Indexes this schema in 2dsphere format (critical for running proximity searches)
LocationSchema.index({location: '2dsphere'});
module.exports = mongoose.model('mean-locations', LocationSchema);
$scope.createUser = function($rootScope, $on) {
// Grabs all of the text box fields
var userData = {
name: $scope.formData.username,
location: {
type: "Point",
coordinates: [$scope.formData.latitude,
$scope.formData.longitude]
}
};
console.log(JSON.stringify(userData));
// Saves the user data to the db
$http.post('/users', userData)
.success(function(data) {
// Once complete, clear the form (except location)
$scope.formData.username = "";
})
.error(function(data) {
console.log('Error: ' + data);
});
};
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
// POST Routes
// --------------------------------------------------------
// Provides method for saving new users in the db
app.post('/users', function(req, res) {
// Creates a new User based on the Mongoose schema and the post body
var newuser = new User(req.body);
// New User is saved in the db.
newuser.save(function(err) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
});
以及我的谷歌浏览器控制台中的以下日志：
/node_modules/mongodb-core/lib/topologies/server.js:766
catch(err) { process.nextTick(function() { throw err}); }
^
Error: Can't set headers after they are sent.
angular.js:10695 GET http://localhost:3000/users net::ERR_CONNECTION_REFUSED
<form name="addForm" novalidate>
<div class="form-group">
<label for="username">Username
<span class="badge">All fields required</span>
</label>
<input type="text" class="form-control" id="username"
placeholder="OldandGold" ng-model="formData.username" required>
</div>
<div class="form-group">
<label for="latitude">Latitude</label>
<input type="text" class="form-control" id="latitude"
value="39.500" ng-model="formData.latitude" readonly>
</div>
<div class="form-group">
<label for="longitude">Longitude</label>
<input type="text" class="form-control" id="longitude"
value="-98.350" ng-model="formData.longitude" readonly>
</div>
<button type="submit" class="btn btn-danger btn-block"
ng-click="createUser()" ng-disabled="addForm.$invalid">Submit</button>
</form>
// Pulls Mongoose dependency for creating schemas
var mongoose = require('mongoose');
var GeoJSON = require('geojson');
var Schema = mongoose.Schema;
var LocationSchema = new Schema({
name: {type: String, required: true},
location: {
type: {type : String, required: true},
coordinates : [Schema.Types.Mixed]
},
created_at: {type: Date, default: Date.now},
updated_at: {type: Date, default: Date.now}
});
// Sets the created_at parameter equal to the current time
LocationSchema.pre('save', function(next){
now = new Date();
this.updated_at = now;
if(!this.created_at) {
this.created_at = now
}
next();
});
// Indexes this schema in 2dsphere format (critical for running proximity searches)
LocationSchema.index({location: '2dsphere'});
module.exports = mongoose.model('mean-locations', LocationSchema);
$scope.createUser = function($rootScope, $on) {
// Grabs all of the text box fields
var userData = {
name: $scope.formData.username,
location: {
type: "Point",
coordinates: [$scope.formData.latitude,
$scope.formData.longitude]
}
};
console.log(JSON.stringify(userData));
// Saves the user data to the db
$http.post('/users', userData)
.success(function(data) {
// Once complete, clear the form (except location)
$scope.formData.username = "";
})
.error(function(data) {
console.log('Error: ' + data);
});
};
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
// POST Routes
// --------------------------------------------------------
// Provides method for saving new users in the db
app.post('/users', function(req, res) {
// Creates a new User based on the Mongoose schema and the post body
var newuser = new User(req.body);
// New User is saved in the db.
newuser.save(function(err) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
});
这是我的视图：
/node_modules/mongodb-core/lib/topologies/server.js:766
catch(err) { process.nextTick(function() { throw err}); }
^
Error: Can't set headers after they are sent.
angular.js:10695 GET http://localhost:3000/users net::ERR_CONNECTION_REFUSED
<form name="addForm" novalidate>
<div class="form-group">
<label for="username">Username
<span class="badge">All fields required</span>
</label>
<input type="text" class="form-control" id="username"
placeholder="OldandGold" ng-model="formData.username" required>
</div>
<div class="form-group">
<label for="latitude">Latitude</label>
<input type="text" class="form-control" id="latitude"
value="39.500" ng-model="formData.latitude" readonly>
</div>
<div class="form-group">
<label for="longitude">Longitude</label>
<input type="text" class="form-control" id="longitude"
value="-98.350" ng-model="formData.longitude" readonly>
</div>
<button type="submit" class="btn btn-danger btn-block"
ng-click="createUser()" ng-disabled="addForm.$invalid">Submit</button>
</form>
// Pulls Mongoose dependency for creating schemas
var mongoose = require('mongoose');
var GeoJSON = require('geojson');
var Schema = mongoose.Schema;
var LocationSchema = new Schema({
name: {type: String, required: true},
location: {
type: {type : String, required: true},
coordinates : [Schema.Types.Mixed]
},
created_at: {type: Date, default: Date.now},
updated_at: {type: Date, default: Date.now}
});
// Sets the created_at parameter equal to the current time
LocationSchema.pre('save', function(next){
now = new Date();
this.updated_at = now;
if(!this.created_at) {
this.created_at = now
}
next();
});
// Indexes this schema in 2dsphere format (critical for running proximity searches)
LocationSchema.index({location: '2dsphere'});
module.exports = mongoose.model('mean-locations', LocationSchema);
$scope.createUser = function($rootScope, $on) {
// Grabs all of the text box fields
var userData = {
name: $scope.formData.username,
location: {
type: "Point",
coordinates: [$scope.formData.latitude,
$scope.formData.longitude]
}
};
console.log(JSON.stringify(userData));
// Saves the user data to the db
$http.post('/users', userData)
.success(function(data) {
// Once complete, clear the form (except location)
$scope.formData.username = "";
})
.error(function(data) {
console.log('Error: ' + data);
});
};
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
// POST Routes
// --------------------------------------------------------
// Provides method for saving new users in the db
app.post('/users', function(req, res) {
// Creates a new User based on the Mongoose schema and the post body
var newuser = new User(req.body);
// New User is saved in the db.
newuser.save(function(err) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
});
这是我的控制器的createUser函数：
/node_modules/mongodb-core/lib/topologies/server.js:766
catch(err) { process.nextTick(function() { throw err}); }
^
Error: Can't set headers after they are sent.
angular.js:10695 GET http://localhost:3000/users net::ERR_CONNECTION_REFUSED
<form name="addForm" novalidate>
<div class="form-group">
<label for="username">Username
<span class="badge">All fields required</span>
</label>
<input type="text" class="form-control" id="username"
placeholder="OldandGold" ng-model="formData.username" required>
</div>
<div class="form-group">
<label for="latitude">Latitude</label>
<input type="text" class="form-control" id="latitude"
value="39.500" ng-model="formData.latitude" readonly>
</div>
<div class="form-group">
<label for="longitude">Longitude</label>
<input type="text" class="form-control" id="longitude"
value="-98.350" ng-model="formData.longitude" readonly>
</div>
<button type="submit" class="btn btn-danger btn-block"
ng-click="createUser()" ng-disabled="addForm.$invalid">Submit</button>
</form>
// Pulls Mongoose dependency for creating schemas
var mongoose = require('mongoose');
var GeoJSON = require('geojson');
var Schema = mongoose.Schema;
var LocationSchema = new Schema({
name: {type: String, required: true},
location: {
type: {type : String, required: true},
coordinates : [Schema.Types.Mixed]
},
created_at: {type: Date, default: Date.now},
updated_at: {type: Date, default: Date.now}
});
// Sets the created_at parameter equal to the current time
LocationSchema.pre('save', function(next){
now = new Date();
this.updated_at = now;
if(!this.created_at) {
this.created_at = now
}
next();
});
// Indexes this schema in 2dsphere format (critical for running proximity searches)
LocationSchema.index({location: '2dsphere'});
module.exports = mongoose.model('mean-locations', LocationSchema);
$scope.createUser = function($rootScope, $on) {
// Grabs all of the text box fields
var userData = {
name: $scope.formData.username,
location: {
type: "Point",
coordinates: [$scope.formData.latitude,
$scope.formData.longitude]
}
};
console.log(JSON.stringify(userData));
// Saves the user data to the db
$http.post('/users', userData)
.success(function(data) {
// Once complete, clear the form (except location)
$scope.formData.username = "";
})
.error(function(data) {
console.log('Error: ' + data);
});
};
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
// POST Routes
// --------------------------------------------------------
// Provides method for saving new users in the db
app.post('/users', function(req, res) {
// Creates a new User based on the Mongoose schema and the post body
var newuser = new User(req.body);
// New User is saved in the db.
newuser.save(function(err) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
});
最后，这里是我的路线：
/node_modules/mongodb-core/lib/topologies/server.js:766
catch(err) { process.nextTick(function() { throw err}); }
^
Error: Can't set headers after they are sent.
angular.js:10695 GET http://localhost:3000/users net::ERR_CONNECTION_REFUSED
<form name="addForm" novalidate>
<div class="form-group">
<label for="username">Username
<span class="badge">All fields required</span>
</label>
<input type="text" class="form-control" id="username"
placeholder="OldandGold" ng-model="formData.username" required>
</div>
<div class="form-group">
<label for="latitude">Latitude</label>
<input type="text" class="form-control" id="latitude"
value="39.500" ng-model="formData.latitude" readonly>
</div>
<div class="form-group">
<label for="longitude">Longitude</label>
<input type="text" class="form-control" id="longitude"
value="-98.350" ng-model="formData.longitude" readonly>
</div>
<button type="submit" class="btn btn-danger btn-block"
ng-click="createUser()" ng-disabled="addForm.$invalid">Submit</button>
</form>
// Pulls Mongoose dependency for creating schemas
var mongoose = require('mongoose');
var GeoJSON = require('geojson');
var Schema = mongoose.Schema;
var LocationSchema = new Schema({
name: {type: String, required: true},
location: {
type: {type : String, required: true},
coordinates : [Schema.Types.Mixed]
},
created_at: {type: Date, default: Date.now},
updated_at: {type: Date, default: Date.now}
});
// Sets the created_at parameter equal to the current time
LocationSchema.pre('save', function(next){
now = new Date();
this.updated_at = now;
if(!this.created_at) {
this.created_at = now
}
next();
});
// Indexes this schema in 2dsphere format (critical for running proximity searches)
LocationSchema.index({location: '2dsphere'});
module.exports = mongoose.model('mean-locations', LocationSchema);
$scope.createUser = function($rootScope, $on) {
// Grabs all of the text box fields
var userData = {
name: $scope.formData.username,
location: {
type: "Point",
coordinates: [$scope.formData.latitude,
$scope.formData.longitude]
}
};
console.log(JSON.stringify(userData));
// Saves the user data to the db
$http.post('/users', userData)
.success(function(data) {
// Once complete, clear the form (except location)
$scope.formData.username = "";
})
.error(function(data) {
console.log('Error: ' + data);
});
};
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
// POST Routes
// --------------------------------------------------------
// Provides method for saving new users in the db
app.post('/users', function(req, res) {
// Creates a new User based on the Mongoose schema and the post body
var newuser = new User(req.body);
// New User is saved in the db.
newuser.save(function(err) {
if (err)
res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
});
使用我的Stringify日志
我可以看到一个合适的json：
{"name":"MyPoint","location":{"type":"Point","coordinates":["50.064","16.260"]}}
我对NodeJs还很陌生，我不明白为什么这种情况一直发生
这是什么原因造成的？如何解决此问题？
提前感谢。问题就在这里，如果出现错误，您必须停止执行。（注意返回）。例如，如果有错误，您的代码将发送（res.send）错误并继续执行res.json（）
它将以您提到的错误结束，因为您已经设置了头并发送了响应
newuser.save(function(err) {
if (err)
return res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
问题在于，如果出现错误，您必须停止执行。（注意返回）。例如，如果有错误，您的代码将发送（res.send）错误并继续执行res.json（）
它将以您提到的错误结束，因为您已经设置了头并发送了响应
newuser.save(function(err) {
if (err)
return res.send(err);
// If no errors are found, it responds with a JSON of the new user
res.json(req.body);
});
“错误：发送邮件后无法设置邮件头。”错误通常表示您正在发送多个响应（使用express）
例如，如果出现错误，此代码将（尝试）发送两个响应
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err); // first response
// If no errors are found, it responds with a JSON of all users
res.json(users); // second response
});
});
要解决此问题，请确保在发送响应后退出：
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err) {
res.send(err);
return; // return here!
}
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
“错误：发送邮件后无法设置邮件头。”错误通常表示您正在发送多个响应（使用express）
例如，如果出现错误，此代码将（尝试）发送两个响应
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err)
res.send(err); // first response
// If no errors are found, it responds with a JSON of all users
res.json(users); // second response
});
});
要解决此问题，请确保在发送响应后退出：
app.get('/users', function(req, res) {
// Uses Mongoose schema to run the search (empty conditions)
var query = User.find({});
query.exec(function(err, users) {
if (err) {
res.send(err);
return; // return here!
}
// If no errors are found, it responds with a JSON of all users
res.json(users);
});
});
谢谢你的回答。我不再收到错误，但它似乎没有将新创建的用户保存到数据库中。知道吗？试着记录错误。如果出现错误，将不保存用户。你也必须对app.get（'/users'，…）执行同样的操作；完全没有错误。当我用postman发布同一个用户时，一切正常。Hmmm。在这种情况下，这可能是一个问题，可能是由于你的角度代码，我不是很熟悉。我建议你用这个问题开始一个新问题。谢谢你的回答。我不再收到错误，但它似乎没有将新创建的用户保存到数据库中。知道吗？试着记录错误。如果出现错误，将不保存用户。你也必须对app.get（'/users'，…）执行同样的操作；完全没有错误。当我用postman发布同一个用户时，一切正常。Hmmm。在这种情况下，这可能是一个问题，可能是由于你的角度代码，我不是很熟悉。我建议你用这个问题开始一个新问题。谢谢你的回答。我不再收到错误，但它似乎没有将新创建的用户保存到数据库中。有什么想法吗？你能试着缩小误差吗。。。可能是post user Hander中的spray console.log。请在此处查看，谢谢您的回答。我不再收到错误，但它似乎没有将新创建的用户保存到数据库中。有什么想法吗？你能试着缩小误差吗。。。可能是post user Hander中的spray console.log。请查看此处