[英]Setting a params hash to a variable within the controller (rails)
I'm very new to rails and have this fairly basic question: 我是Rails的新手,有一个相当基本的问题:
I have a form that takes in an array: 我有一个采用数组的形式:
<td><%= fields_for "days" do |form| %>
M: <%= form.check_box "", {}, 'M', '' %>
T: <%= form.check_box "", {}, 'T', '' %>
W: <%= form.check_box "", {}, 'W', '' %>
Th: <%= form.check_box "", {}, 'Th', '' %>
F: <%= form.check_box "", {}, 'F', '' %>
<% end %>
This should be accessible through params[:days]. 这可以通过params [:days]访问。 How can I assign params[:days] to a variable within the controller?
如何在控制器中为变量分配params [:days]? @days is not correct here, right?
@days在这里不正确,对吗? (There's no Days object, so there's no instance of that object).
(没有Days对象,因此没有该对象的实例)。 What should go in the [correct_variable] slot below?
下面的[correct_variable]位置应该显示什么?
[correct_variable] = params[:days]
Thanks! 谢谢!
In response to comments: 回应评论:
I tried using @days, but for some reason it wouldn't get called where I'd like it to. 我尝试使用@days,但是由于某种原因,它不会在我想要的地方被调用。 In particular, I'd like to pass it to my Search model:
特别是,我想将其传递给我的搜索模型:
class Search < ActiveRecord::Base
attr_accessible :name, :day, :units, :instructor
def courses
@courses ||= find_courses
end
private
def find_courses
Course.find(:all, :conditions => conditions)
end
def day_conditions
["courses.day LIKE ?", "%"+ @days.join("%")+"%"]
end
I first instantiate @days in my courses controller (which is connected, through the index method, to a partial that uses an instance of the Search object. 首先,我在课程控制器中实例化@days(通过index方法连接到使用Search对象实例的部分控制器)。
More code: 更多代码:
From courses/index.html.erb: 从courses / index.html.erb:
<% if @search.save %>
<div id = "results_scroll">
<%= render :partial => 'searches/search_results' %>
</div>
<% else %>
From search_results partial: 来自search_results部分:
<% "Search" %>
<table>
<tr>
<th align="left" width="25%"><%= 'Name' %></th>
<th align="left" width="10%"><%= 'Number' %></th>
<th align="left" width="20%"><%= 'Instructor' %></th>
<th align="left" width="10%"><%= 'Room' %></th>
<th align="left" width="5%"><%= 'Day' %></th>
<th align="left" width="5%"><%= 'Units' %></th>
<th align="left" width="15%"><%= 'Time' %></th>
<th align="left" width="10%"><%= 'Limitations' %></th>
</tr>
<%= render :partial => @search_show.courses %>
</table>
From the courses controller (this has the @search_show variable). 从课程控制器(具有@search_show变量)。
def index
@courses = Course.order(sort_column + " " + sort_direction)
@search = Search.new
@search_show = Search.last
@title = "List"
@days = params[:days]
Finally, the _course.html.erb partial: 最后,_course.html.erb部分:
<tr>
<td><%= course.name %></td>
<td><%= course.number %></td>
<td><%= course.instructor %></td>
<td><%= course.room %></td>
<td><%= course.day %></td>
<td><%= course.units %></td>
<td><%= course.time %></td>
<td><%= course.limitations %></td>
<td><%= link_to 'Show', course %></td>
</tr>
通过使用$ days全局变量而不是@days解决了该问题。
This is not really an answer, but there is some problems with how you are trying to access your @days
variable you set in the controller. 这并不是一个真正的答案,但是您尝试访问在控制器中设置的
@days
变量的方式存在一些问题。
# your controller
...
def index
...
@days = params[:days]
# your model
...
private
def day_conditions
["courses.day LIKE ?", "%"+ @days.join("%")+"%"]
end
The @days
, in your model, you are calling is not going to access the @days
in your controller. @days
在模型中,您要调用的将不会访问控制器中的@days
。 Each @days
belongs to their respective instances. 每个
@days
属于各自的实例。
You should find a method of sending the @days
from your controller into your models, instead of using global variables. 您应该找到一种将
@days
从控制器发送到模型中的方法,而不是使用全局变量。
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