model-view-controller

问题 I have read a lot about MVC design pattern, but some of the things are still unclear to me. I know that "Model" is for data and business logic, "View" is for presentation and "Controller" is for using "Models" and providing "Views" (i.e. C is the communication channel between M and V). Now, I have the following problem I want to solve: Problem: The web application takes as input, a list of Nodes from a user. Then, a Model is used to make a Graph (i.e. Data Structure Graph and not x-y graph)

问题 Today I started to add some client side Javascript code, like a nice date picker or some collapsing modals to my ASP.NET Core MVC WebApp. I don't need all this settings on initial stuff in each view, so on my opinion the cleanest way is to define for each view a own js file. First would I like to know, if this is the right way to do stuff like this? Or just take a big .js file, give each element a unique id and work over that? So I was looking for achieving this in a nice way. But I only

问题 I'm having a problem involving a database transaction in one class that is timing out due to a secondary database connection being opened within the transaction; the problem started occurring when I added a foreign key constraint. And, testing using: SET foreign_key_checks = 0; I've been able to confirm this. My database class looks like this (I've left off all of the methods): class Db { function __construct($config) { $this->config = $config; } private function connect($config) {$dsn =

问题 I'm getting the error message "Uncaught TypeError: $(...).valid is not a function" when attempting to call... javascript $('input[data-val=true]').on('blur', function() { $(this).valid(); }); HTML <div class="col-xs-12 col-sm-5" style="margin-left:4px"> <input required="True" class="form-control" data-bind="value: battleModel.ReserveTroopCount" data-val="true" data-val-number="The field Troop reserve must be a number." data-val-range="Troop reserve must be between 0 and 1000." data-val-range

问题 I am a little confused as to the definition of classes as Models or Views in the Sketch example AppKit application (found at /Developer/Examples/AppKit/Sketch). The classes SKTRectangle, SKTCircle etc. are considered Model classes but they have drawing code. I am under the impression that Models should be free of any view/drawing code. Can someone clarify this? Thanks. 回答1: The developer of Sketch outlines his/her rationale a bit in the ReadMe file: Model-View-Controller Design The Model

问题 Quick question, my data model is a singleton object and it contains a list of names that I want to archive. My idea is to make the model responsible for loading and saving it's own data. The model's load method will be called by the ViewController 's viewDidLoad method and save by the ViewController 's applicationWillTerminate . I could do the load/save directly within the ViewController, but this would be messy as the list of names are an instance variable of the model. gary 回答1: You could

问题 I have Person model, it contains id, first_name, last_name etc and merital_id field. I also have Merital model contains only 2 field: id and title. Server responses JSON like: { success: true, items: [ { "id":"17", "last_name":"Smith", "first_name":"John", ... "marital_id":1, "marital": { "id":1, "title":"Female" } }, ... ] } So how can I connect my models with association? I still can use record.raw.merital.title in my column.renderer, but I cannot use such fields in templates like {last

问题 Sorry about the question title, but I couldn't find a more appropriate way to phrase this. I am currently building a CakePHP powered website and I'm not quite sure how to approach the following issue. The website looks something like the follwing mockup: . The greyed out areas are part of the layout, because their content does not change between views. In the sidebar, I have a collection of ads who are linked to several models. I need controller logic to determine the picture associated with

问题 are there times you might want to use multiple controllers in mvc? eg. /controllers/foo.php /controllers/bar.php or /controllers/foo/baz1.php /controllers/foo/baz2.php /controllers/bar/baz1.php /controllers/bar/baz2.php could someone give some examples WHEN i might want to do that and some example controller names. one occasion i thought about might be when you got a main site (for users) and a admin site (for customers). all feedbacks and suggestions are appreciated 回答1: Usually controllers

问题 I am attempting to use and id that being passed into the URL to edit the query but when attempting to run the code I get an error of: Call to a member function where() on a non-object Controller class HomeController extends BaseController { public function showWelcome() { $id = intval($_GET['wab_id']); $results = DB::Table('films')->get()->where('wab_id','=', $id); print_r($results); while ($row=mysql_fetch_array($results)) { $url = $row['url']; } return View::make('hello')->with('row', $url)