link_to路径定义

Question

我正在开发一个Rails v2.3.2应用程序。

我有一个控制器：

class SchoolController < ApplicationController
  ...

  def edit
    @school=School.find_by_id params[:id]

  end

  def check_teachers
    @teachers = @school.teachers
    ...
  end

end

在app/views/schools/edit.html.erb我想有一个link，点击它会触发控制器中的check_teachers方法，如何定义这个link的路径？

app / views / schools / edit.html.erb：

link_to 'Check teachers' WHAT_IS_THE_PATH_HERE

Answer 1

link_to 'Check teachers', :action => :check_teachers, :id => @school.id

要么

link_to 'Check teachers', "/school/check_teachers/#{@school.id}"

或者您可以在config/routes.rb中定义命名路线，如下所示：

map.check_teachers, '/school/check_teachers/:id' :controller => :school, :action => :check_teachers

并调用named-route生成的url-helper，如下所示：

link_to 'Check teachers', check_teachers_path(:id => @school.id)

并且您可以使用此ID在控制器中查找教师

def check_teachers
  @school = School.find params[:id]
  @teachers = @school.teachers
  ...
end

Answer 2

您可以在routes.rb文件中定义类似的内容。

map.connect "schools/:id/check_teachers", :controller => "schools", :action => "check_teachers"

然后你将如下设置你的link_to：

link_to "Check teachers", check_teachers_path(:id => @school.id)

您需要将此位代码添加到控制器中，因为控制器操作之间不共享模型状态：

 def check_teachers
    @school = School.find_by_id(params[:id])
    # Then you can access the teachers with @school.teachers
  end

这是未经测试但应该有效。如果您有任何进一步的问题，请评论。