Question

我正在尝试创建一个带有2个操作按钮的基本应用程序：一个用于添加正面评分，一个用于添加负面评分。然而，当我尝试添加负分数时，它会添加正分数。我的代码如下所示。

控制器：

  def profile
    @user = User.find(params[:id])
    @record = Record.where(user_id: @user.id)
    @recordid = Record.find_by(user_id: @user.id)
  end

  def add_positive
    @user = User.find(params[:id])
    @recordid = Record.find_by(user_id: @user.id)
    @recordid.positivescore +=1
      if @recordid.save
        redirect_back(fallback_location: records_path)
     end
  end

  def add_negative
    @user = User.find(params[:id])
    @recordid = Record.find_by(user_id: @user.id)
    @recordid.negativescore +=1
      if @recordid.save
        redirect_back(fallback_location: records_path)
     end
  end

我的观点：

<%= @record.each do |user_record| %>
    Positive: <%= user_record.positivescore %> <%= button_to "Add Positive Score", :action => "add_positive" %>
    Negative: <%= user_record.negativescore %> <%= button_to "Add Negative Score", :action => "add_negative" %>
<% end %>

我遇到的问题 - 每当我尝试添加负分数时，它会改为增加正分数。在我的头撞墙几个小时后，我发现这是因为我的routes.rb文件。

routes.rb中：

  post '/profile/:id', to: 'users#add_positive'
  post '/profile/:id', to: 'users#add_negative'

这让我意识到我可能错误地解决了整个问题，我不应该在我的控制器中定义3个单独的方法。有人可以指出我正确的方向，我应该这样做吗？

Answer 1

您可以保留两种方法，但它们必须具有不同的路径：

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                CardLayout cardLayout = new CardLayout();
                JPanel base = new JPanel(cardLayout);
                base.add(makePanel(200, 200, Color.RED), "red");
                base.add(makePanel(400, 400, Color.BLUE), "blue");

                frame.add(base);

                JButton blue = new JButton("Blue");
                blue.addActionListener(new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        cardLayout.show(base, "blue");
                    }
                });
                JButton red = new JButton("red");
                red.addActionListener(new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        cardLayout.show(base, "red");
                    }
                });

                JPanel buttons = new JPanel();
                buttons.add(red);
                buttons.add(blue);

                frame.add(buttons, BorderLayout.SOUTH);

                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public TestPane makePanel(int width, int height, Color background) {
        TestPane pane = new TestPane(new Dimension(width, height));
        pane.setBackground(background);
        return pane;
    }

    public class TestPane extends JPanel {

        private JLabel label;
        private Dimension preferredSize;

        public TestPane(Dimension size) {
            label = new JLabel("...");
            setLayout(new GridBagLayout());
            add(label);
            this.preferredSize = size;
        }

        @Override
        public Dimension getPreferredSize() {
            return preferredSize;
        }

        @Override
        public void invalidate() {
            super.invalidate();
            label.setText(getWidth() + "x" + getHeight());
        }

    }

}

不正确的控制器结构不允许多个动作

1 个答案: