edit

问题 When I click the edit I get: First argument in form cannot contain nil or be empty in bets/app/views/users/_form.html.erb users/_form <%= form_for(@user) do |f| %> <% if @user.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2> <ul> <% @user.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end %> </ul> </div> <% end %> <p> <%= f.label :name, "Username" %><br /> <%= f.text_field :name %> </p> <p>

问题 When I click the edit I get: First argument in form cannot contain nil or be empty in bets/app/views/users/_form.html.erb users/_form <%= form_for(@user) do |f| %> <% if @user.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2> <ul> <% @user.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end %> </ul> </div> <% end %> <p> <%= f.label :name, "Username" %><br /> <%= f.text_field :name %> </p> <p>

问题 I am developing address book app. When user selects a user from a contact list , I want to open that record directly in EDIT mode using ABPersonViewController instead of clickng Edit button of ABPersonViewController . How can I achieve this? Thanks 回答1: Just call setEditing after the view is displayed: ABPersonViewController *ab = [[ABPersonViewController alloc] init]; ab.allowsEditing = YES; // customize as you see fit [self.navigationController pushViewController:ab animated:YES]; [ab

问题 ive seen some yahoo pipes that would, e.g., allow to extract a feed from twitter, remove the hyperlink (so just the anchor text will stay) or edit another URL into it automatically. The question is: How can this be done with any feed (removing all clickable links while leaving the rest unchanged), not just with twitter? Thanks, tellio. 回答1: We need 2 modules. Fetch Feed and Regex . You can find them from left panel. Drag them to right area. Hook them as I did. In Fetch Feed module put your

问题 How to edit text in the TextArea in `.fxml file as such I can use line breaks and tabs . The Textarea is predefined and can not be edited. Images to support FXML File The View 回答1: If you want to directly use the text you can use something : <TextArea prefHeight="200.0" prefWidth="200.0" text="${'Multi\nLine\tTab'}" /> In case you want to use in Scene Builder, you can switch to multi-line mode. Switching to multi-line mode, scene builder will insert: for \n for \t 来源： https:/

问题 I was trying to redirect to a different page after editing an entry, I assumed that it was using the update code because you are updating the database. It took me some time to realise that I was using the wrong action in the controller. Can someone please explain how edit and update work. Why are there two different actions? what are the differences between them? 回答1: edit action is responsible for rendering the view update action is responsible for interacting with the model (db updates etc)

问题 I have a Firemonkey multi device project in Delphi 10 Seattle where the user can get a screen at the start of the app. Here the user needs to fill in 2 fields. But when I click on the edit fields the Virtual Keyboard isn't shown. If I skip this screen at start and call it later then the Virtual Keyboard is shown. This is done in the same way too. I found sort of a solution: When i click on the edit fields i call show VirtualKeyboard myself. The only problem is that the cursor isn't shown in

问题 Echoing previously saved data (excluding those from dropdown values) already works fine for me. I could see correct data saved for a particular record, however, after editing the form, I don't see anything successful after it. The data which were supposedly edited remain the same. Everything I typed to actually edit the echoed values went nowhere. I currently have this in my controller: public function edit_job() { $this->validateRole('client'); $this->load->model('job_model'); $id = $this-

问题 This is doing my head in:-) I have a fully functional CoreData Populated UITableView inside a UIViewController and I have successfully implemented the "Swipe to Delete option" (which is easy) and I can also delete single instances with an edit button where the red circle thingy comes up. My problem is, and I think it is because I have a CustomCell, that when I press the edit button the UILabels do not move to the right. I have tried using -(void)layoutSubViews and a few others, but nothing

问题 I doubt this is possible without extensive jail-breaking, but is it at all possible to edit the iPad's (or any iOS device's) hosts file? 回答1: No. Apps can only modify files within the documents directory, within their own sandbox. This is for security, and ease of installing/uninstalling. So you could only do this on a jailbroken device. 回答2: The previous answer is correct, but if the effect you are looking for is to redirect HTTP traffic for a domain to another IP there is a way. Since it