controller

问题 Is there any thing missing in my connection string so that i am getting this error: An exception of type 'System.Data.ProviderIncompatibleException' occurred in EntityFramework.dll but was not handled in user code Additional information: An error occurred while getting provider information from the database. This can be caused by Entity Framework using an incorrect connection string. Check the inner exceptions for details and ensure that the connection string is correct. This is my connection

问题 i am having the following problem: i want to test the logout action of my controller. before that i am calling the login method of my controller which both redirect to the same page. now I am getting the following error message: groovy.grails.web.servlet.mvc.exceptions.CannotRedirectException: Cannot issue a redirect(..) here. A previous call to redirect(..) has already redirected the response. i do understand the problem, however all suggested solutions (calling the reset() method; calling

问题 Here is the scenario Table: Users id | name | grade | subject ---- | ------|--------|------ 1 | Mark | a | science 2 | Earl | a | english 3 | John | c | english 4 | Mike | d | science 5 | Matt | e | english What I want to do is populate the grades that are non-repeating or non-duplicate grades but for english subject only So it should just show c e I've got this far controller: $grades = user::select('grade', DB::raw('COUNT(grade) as gradecount')) ->where('subject', 'english') ->groupBy(

问题 I've got an Android app in Cocos2d-x that uses a WebView to display the front end menu. Currently it's just a mock-up, and just has a URL to a website, which makes it easy to test. If I load the URL of the interface in the Amazon Web App Tester on an Amazon Fire TV stick it works perfectly, and you can navigate the interface happily with the controller. However, when I load the app on the stick, which shows the same URL in a WebView component then the controller has no effect and doesn't

问题 I have a project in school where I have to develop a program where you first can choose whether you want to save/read to/from a SQL DB or to save/read to/from XML. I've made a GUI where you can choose between both methods. The GUI closes after the user clicks on one of the buttons and the MainMenu GUI opens. Now I need to know in the MainMenuController what the user choose. I found online a Method to call the MainMenuController inside the first controller, with FXMLLoader.getController() .

问题 I have a project in school where I have to develop a program where you first can choose whether you want to save/read to/from a SQL DB or to save/read to/from XML. I've made a GUI where you can choose between both methods. The GUI closes after the user clicks on one of the buttons and the MainMenu GUI opens. Now I need to know in the MainMenuController what the user choose. I found online a Method to call the MainMenuController inside the first controller, with FXMLLoader.getController() .

问题 So, this is my main FXML file, called 'Home.fxml': <VBox maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="500.0" prefWidth="700.0" xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1"> <fx:include source="MenuBar.fxml" /> <Label alignment="CENTER" maxWidth="1.7976931348623157E308" text="Welcome to MSMusic" textAlignment="CENTER"> <font> <Font size="62.0" /> </font> </Label> <fx:include source=

问题 i am making a simple website in PHP laravel framework where the top navigation links are being generated dynamically from the database. I am generating the $pages variable in the home controller action and passing to layout file. My code is as below: public function home() { $pages = Page::all(); return View::make('home')->with('pages', $pages); } public function login() { return View::make('login'); } But when i try to access the login action, i get the error variable $pages not found since

问题 I want to connect two entity (project and issues) and Rails says some error message, but I don't know, what should I do. Can you help me fix it, please? Thanks a lot. 回答1: Not sure what your are trying to do, but it looks like you have a nested resource and therefore want to pass an array to form_for , but you are actually passing two separate objects. Change: <%= form_for(@project, @project.issues.build) do |f| %> to: <%= form_for([@project, @project.issues.build]) do |f| %> With this change

问题 I am currently trying to use Miles J plugin located here http://milesj.me/code/cakephp/uploader Although I have made great progress learning CakePhp, I am currently having a problem using the plugin and I would appreciate any help provided. I have followed all the necessary steps to use the plugin. It has been downloaded put on Plugin folder, I bootstrapped with CakePlugin::loadAll(). So far so good. Next I have proceed to set up the table as indicated by the plugin developer. Ok, now back to