model-view-controller

问题 How can we limit a user to 1 like per comment? comments_controller.rb def like @comment = Comment.find(params[:id]) @comment.increment!(:likes) @comment.create_activity :like flash[:success] = 'Thanks for liking!' redirect_to(:back) end _comments.html.erb <% @comments.each do |comment| %> <%= User.find(comment.user_id).name %> <%= simple_format comment.content %> <%= pluralize(comment.likes, 'like') %> <%= link_to content_tag(:span, '', class: 'glyphicon glyphicon-thumbs-up') + ' Like it',

问题 Are there are any approaches in ASP.NET or JavaScript where i run update stored procedure on only those rows in which specific columns have been updated by user? For example: if there are multiple rows row1= [column1 column2 column3 column4 coumn 5] row2= [column1 column2 column3 column4 coumn 5] row3= [column1 column2 column3 column4 coumn 5] row4= [column1 column2 column3 column4 coumn 5] If the column 2 and Column 3 are updated in row 1 and column 1 and column 4 are update in row 3 i want

问题 I want to insert current Datetime when ever a new row is inserted. I am using Code First Approach of EF 6,MVC 5 After searching I got this [DatabaseGenerated(DatabaseGeneratedOption.Computed)] public DateTime? CreatedDate { get; set; } It has to be written in Models Class,but when ever a new record is inserted NULL is saved in DB,I have noticed that this is just declaration of CreatedDate,where to write CreatedDate = DateTime.Now OR any other way to solve it. My Entire Model namespace

问题 I have downloaded the boilerplate project available here Boilerplate I have made sure that VS 2015 is up to date. When trying to create a project (asp.net core MVC 6 (rc2) Boilerplate (also RC2))I get the error: The imported project "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\V14.0\Dotnet\Microsoft.DotNet.Props" was not found. Confirm that the path in the declaration is correect and that the file exists on Disk. I've checked the path and this isn't there, question is, what is it?

问题 First of all, I have been a php programmer for a long time and I am a mvc programmer newly. I did a few minor web sites that each have one or two controller at most. But I've started a website that will be very major web site. There will be a lot of data to pass to views. Now, normally I try to use model approach every time instead of ViewBag or ViewData approach. If the view demands more data, then I change the model class and then recompile the project. Especially, if the topic is an index

问题 In an archetypical MVC architectur, where does the logic go, that determines which view to show next? The assumption is some kind of app with several views (windows) that may or may not be visible at different times, depending on user actions. For instance, sometimes the application may need the user to fill out a form with additional details, other times it may not. Is it the controllers responsibility to ask for a specifik view to become visible? Am I thinking about this wrong? Maybe the

问题 I'm learning how to write java servlets and jsp pages on google app engine. I'm attempting to use an MVC model but I'm not sure if I'm doing it right. Currently, I have a servlet that is called when a page is accessed. The servlet does all the processing and creates a HomePageViewModel object that is forwarded to the jsp like this: // Do processing here // ... HomePageViewModel viewModel = new HomePageViewModel(); req.setAttribute("viewModel", viewModel); //Servlet JSP communication

问题 I'm working on my own MVC framework in PHP. Its model layer consists of Domain objects (also known as "models"), which encapsulate the business logic and Data mappers, for transfering the data between the domain objects and the database. A data mapper abstract class does not exist, each data mapper class containing its own implementation of the data access layer. The class methods of the data mappers contain, or will contain complex sql statements. My question is : Under these circumstances,

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . Here's my database structure: In my app I have a company management of customers, employees and branches. Customers and Employees are associated with one

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . Here's my database structure: In my app I have a company management of customers, employees and branches. Customers and Employees are associated with one