所以我试图根据 collection_select 下拉框过滤一些数据。
我可以成功地使用 text_field_tag 过滤数据,所以我假设我的过滤器工作正常,但我不能让 collection_select 做同样的事情?
如果我在 text_field_tag 中输入 1,我会生成 "search"=>"1" 作为参数的一部分,但如果我从 collection_select 中选择,我会得到... {"utf8"=>"✓", "search "=>{"搜索"=>"1"},...
index.html.erb
<h1>Students#index</h1>
<p>Find me in app/views/students/index.html.erb</p>
<%= form_tag students_path, :method => 'get' do %>
<%= collection_select :search , :search.to_s, Tutor.all, :id, :name, prompt: true %>
<%= submit_tag "search" %>
<% end %>
<% @students.each do |n| %>
<li>
<%= link_to n.first_name, student_path(n) %>
<%= n.surname %> ..tutor is...
<%= n.tutor.name %>
</li>
<% end %>
<%= params.inspect %>
<%= form_tag(students_path, :method=> "get", id: "search-form") do %>
<%= text_field_tag :search, params[:search], placeholder: "Search Students" %>
<%= submit_tag "Search", :name => nil %>
<% end %>
学生.rb
class Student < ActiveRecord::Base
belongs_to :tutor
def self.search(search)
where("tutor_id LIKE ?","%#{search }%")
end
end
student_controller.rb
class StudentsController < ApplicationController
def index
if params[:search]
@students = Student.search(params[:search])
else
@students = Student.all
end
end