如何使提交按钮调用函数？

<%= form_tag('add_person', method: 'get') do %>
                <%= label_tag(:name, 'Name') %>
                <%= text_field_tag(:name) %>
                <%= submit_tag 'Add new person' %>
        <% end %>

<%= def add_person
                if params[:name] == "John")
                enter code here
                else
                enter code here               
                end
end %>

How do I make the submit button call the function add_person? I'm using Ruby/Rails

如何让提交按钮调用add_person函数？我正在使用Ruby / Rails

1 个解决方案

#1

Calling one or more methods via submit button:

通过提交按钮调用一个或多个方法：

The form_tag helper determines the controller method to be called:

form_tag帮助程序确定要调用的控制器方法：

<%= form_tag('controller/controller_method', method: 'put') do %>

The submit_tag passes a value to the controller where it's evaluated.

submit_tag将值传递给评估它的控制器。

<%= submit_tag "Add Person" %>

In the controller, you branch based on the value passed by your submit button:

在控制器中，您可以根据提交按钮传递的值进行分支：

def controller_method
  if params[:commit] == "Add Person"
    add_person
  elsif params[:commit] == "Method 2"
    method_2
  elsif params[:commit] == "Method 3"
    method_3
  end
end

Calling method via arbitrary button

通过任意按钮调用方法

You probably have something like this at the bottom of your form:

您可能在表单底部有这样的内容：

  <div class="actions">
    <%= f.submit %>
  </div>

which can be replaced with the button_to helper, like so:

可以用button_to帮助器替换，如下所示：

  <%= button_to "Submit", :method=> 'add_person' %>

Your add_person method would have to be defined in the controller for the object to which your form refers.

您的add_person方法必须在控制器中为表单引用的对象定义。

#1