我正在开发一个在线课程应用程序，我正在尝试在创建课程后为特定课程添加新的视频讲座。一旦创建了一个课程，之后，如果我们尝试添加新课程，那么它就会发送更新请求，即使我正在添加新的视频讲座，到目前为止在MongoDB中还没有。这是我的猫鼬模式。文件名： - course.server.model.js。
02/05 01:32:48: Launching app
No apk changes detected since last installation, skipping installation of C:\Users\Emily\AndroidStudioProjects\SST1\app\build\outputs\apk\app-debug.apk
$ adb shell am force-stop sst1.emily.example.com.sst1
$ adb shell am start -n "sst1.emily.example.com.sst1/sst1.emily.example.com.sst1.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D
Connecting to sst1.emily.example.com.sst1
I/System.out: Sending WAIT chunk
W/ActivityThread: Application sst1.emily.example.com.sst1 is waiting for the debugger on port 8100...
I/System.out: Debugger has connected
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
Connected to the target VM, address: 'localhost:8600', transport: 'socket'
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
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I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: debugger has settled (1493)
I/InstantRun: Instant Run Runtime started. Android package is sst1.emily.example.com.sst1, real application class is null.
W/InstantRun: No instant run dex files added to classpath
W/dalvikvm: VFY: unable to resolve interface method 15998: Landroid/view/Window$Callback;.onProvideKeyboardShortcuts (Ljava/util/List;Landroid/view/Menu;I)V
W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
W/dalvikvm: VFY: unable to resolve interface method 16000: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
W/dalvikvm: VFY: unable to resolve interface method 16004: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
W/dalvikvm: VFY: unable to resolve virtual method 686: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
W/dalvikvm: VFY: unable to resolve virtual method 708: Landroid/content/res/TypedArray;.getType (I)I
W/dalvikvm: VFY: unable to resolve virtual method 16431: Landroid/widget/FrameLayout;.startActionModeForChild (Landroid/view/View;Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
W/dalvikvm: VFY: unable to resolve virtual method 419: Landroid/content/Context;.getColorStateList (I)Landroid/content/res/ColorStateList;
W/dalvikvm: VFY: unable to resolve virtual method 649: Landroid/content/res/Resources;.getDrawable (ILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
W/dalvikvm: VFY: unable to resolve virtual method 651: Landroid/content/res/Resources;.getDrawableForDensity (IILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering
W/dalvikvm: VFY: unable to resolve instanceof 148 (Landroid/graphics/drawable/RippleDrawable;) in Landroid/support/v7/widget/AppCompatImageHelper;
W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x416abe18)
E/AndroidRuntime: FATAL EXCEPTION: main
Process: sst1.emily.example.com.sst1, PID: 15643
java.lang.RuntimeException: Unable to start activity ComponentInfo{sst1.emily.example.com.sst1/sst1.emily.example.com.sst1.MainActivity}: java.lang.IllegalArgumentException: you must specify a way to create the tab content
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
at android.app.ActivityThread.access$800(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5872)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: you must specify a way to create the tab content
at android.widget.TabHost.addTab(TabHost.java:225)
at sst1.emily.example.com.sst1.MainActivity.onCreate(MainActivity.java:22)
at android.app.Activity.performCreate(Activity.java:5312)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
at android.app.ActivityThread.access$800(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5872)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
at dalvik.system.NativeStart.main(Native Method)
这是我更新课程的node.js控制器。文件名： - courses.server.controller.js
'use strict';
/**
* Module dependencies
*/
var mongoose = require('mongoose'),
Schema = mongoose.Schema;
/**
* Course Schema
*/
var CourseSchema = new Schema({
created: {
type: Date,
default: Date.now
},
title: {
type: String,
default: '',
trim: true,
required: 'Title cannot be blank'
},
content: {
type: String,
default: '',
trim: true
},
// courseLecture: [String],
courseLecture: [{
lecture_title: {
type: String
},
// week_number: { type: Number },
lecture_video: [String],
pdf_files: [String]
// lecture_video: [{ videoUrl: String }]
}],
/*
courseLecture: {
type: String,
default: '',
trim: true
},*/
user: {
type: Schema.ObjectId,
ref: 'User'
}
});
mongoose.model('Course', CourseSchema);
有趣的是，我能够更新两个字段，即标题和内容，但是，无论课程数组中有什么内容，我都无法更新或进行新的保存。 请告诉我，我在这里出错了。
为了更清晰地说明我的前端工作，我添加了角度控制器和HTML文件代码。 角度控制器。文件名： - course.client.controller.js
'use strict';
/**
* Module dependencies
*/
var path = require('path'),
mongoose = require('mongoose'),
Course = mongoose.model('Course'),
errorHandler = require(path.resolve('./modules/core/server/controllers/errors.server.controller'));
/**
* Create an course
*/
exports.create = function(req, res) {
var course = new Course(req.body);
course.user = req.user;
course.save(function(err) {
if (err) {
return res.status(422).send({
message: errorHandler.getErrorMessage(err)
});
} else {
res.json(course);
}
});
};
/**
* Show the current course
*/
exports.read = function(req, res) {
// convert mongoose document to JSON
var course = req.course ? req.course.toJSON() : {};
// Add a custom field to the Course, for determining if the current User is the "owner".
// NOTE: This field is NOT persisted to the database, since it doesn't exist in the Course model.
course.isCurrentUserOwner = !!(req.user && course.user && course.user._id.toString() === req.user._id.toString());
console.log('course value is: ' + course);
console.log('video lecture embed value is: ' + course.courseLecture.lecture_video);
res.json(course);
};
/**
* Update an course
*/
exports.update = function(req, res) {
var course = req.course;
course.title = req.body.title;
course.content = req.body.content;
course.courseLecture.lecture_video = req.body.courseLecture.lecture_video;
course.courseLecture.lecture_title = req.body.courseLecture.lecture_title;
course.courseLecture.pdf_files = req.body.courseLecture.pdf_files;
console.log('course lecture video url is: ' + req.body.courseLecture.lecture_video);
course.save(function(err) {
if (err) {
return res.status(422).send({
message: errorHandler.getErrorMessage(err)
});
} else {
res.json(course);
}
});
};
/**
* Delete an course
*/
exports.delete = function(req, res) {
var course = req.course;
course.remove(function(err) {
if (err) {
return res.status(422).send({
message: errorHandler.getErrorMessage(err)
});
} else {
res.json(course);
}
});
};
/**
* List of Courses
*/
exports.list = function(req, res) {
Course.find().sort('-created').populate('user', 'displayName').exec(function(err, courses) {
if (err) {
return res.status(422).send({
message: errorHandler.getErrorMessage(err)
});
} else {
res.json(courses);
}
});
};
/**
* Course middleware
*/
exports.courseByID = function(req, res, next, id) {
if (!mongoose.Types.ObjectId.isValid(id)) {
return res.status(400).send({
message: 'Course is invalid'
});
}
Course.findById(id).populate('user', 'displayName').exec(function(err, course) {
if (err) {
return next(err);
} else if (!course) {
return res.status(404).send({
message: 'No course with that identifier has been found'
});
}
req.course = course;
next();
});
};
我的HTML文件。文件名： - form-course.client.view.html
(function () {
'use strict';
angular
.module('courses.admin')
.controller('CoursesAdminController', CoursesAdminController);
CoursesAdminController.$inject = ['$scope', '$state', '$window', 'courseResolve', 'Authentication', 'Notification'];
function CoursesAdminController($scope, $state, $window, course, Authentication, Notification) {
var vm = this;
vm.course = course;
vm.authentication = Authentication;
vm.form = {};
vm.remove = remove;
vm.save = save;
vm.ShowHide = ShowHide;
vm.addNewChoice = addNewChoice;
$scope.IsVisible = false;
function ShowHide() {
// If DIV is visible it will be hidden and vice versa.
$scope.IsVisible = $scope.IsVisible ? false : true;
}
function addNewChoice() {
$scope.vm.course.courseLecture.push('');
}
// Remove existing Course
function remove() {
if ($window.confirm('Are you sure you want to delete?')) {
vm.course.$remove(function() {
$state.go('admin.courses.list');
Notification.success({ message: '<i class="glyphicon glyphicon-ok"></i> Course deleted successfully!' });
});
}
}
// Save Course
function save(isValid) {
if (!isValid) {
$scope.$broadcast('show-errors-check-validity', 'vm.form.courseForm');
return false;
}
// Create a new course, or update the current instance
vm.course.createOrUpdate()
.then(successCallback)
.catch(errorCallback);
function successCallback(res) {
$state.go('admin.courses.list'); // should we send the User to the list or the updated Course's view?
Notification.success({ message: '<i class="glyphicon glyphicon-ok"></i> Course saved successfully!' });
}
function errorCallback(res) {
Notification.error({ message: res.data.message, title: '<i class="glyphicon glyphicon-remove"></i> Course save error!' });
}
}
}
}());
答案 0 :(得分：0)
exports.update = function(req, res) {
var course = req.course;
您的req.course不是mongodb对象。你可以使用mongoose的findOneAndUpdate方法 http://mongoosejs.com/docs/api.html#model_Model.findOneAndUpdate
答案 1 :(得分：0)
如果您的数据目前如下：
{
courseLecture: {
lecture_title: 'Test',
lecture_video: ['vid1', 'vid2'],
pdf_files: ['pdf1', 'pdf2']
}
}
我认为你需要做的就是改变这一点：
courseLecture: [{
lecture_title: {
type: String
},
// week_number: { type: Number },
lecture_video: [String],
pdf_files: [String]
// lecture_video: [{ videoUrl: String }]
}]
到此：
courseLecture: {
lecture_title: {
type: String
},
lecture_video: {type: [String] },
pdf_files: {type: [String] }
}
您最初将Schema定义为在＆＃39; courseLecture＆＃39;中有一系列对象。字段，因此要么验证在保存期间没有通过，要么架构甚至不执行set操作。