Hi, I'm beginner of Rails in Korea.
I have a serious problem..
I wanna show the list of students filtered by options.
If I selected H1(high school 1), male, and English,
I wanna get the list of students who are H1, male, subject English.
But.. I couldn't..
"/search/result" screen just show 'nil' ..
Please help me!!!
++ index.html.erb
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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<%= form_tag("/search/result", :method => "get") do %>
<%= select("search", "", @grades.map { |g| ["#{g.grade}",
g.id] }, { :include_blank => true }) %>
<%= select("search", "", @sexes.map { |x| ["#{x.sex}",
x.id] }, { :include_blank => true }) %>
<%= select("search", "", @subjects.map { |s|
["#{s.subject}", s.id] }, { :include_blank => true }) %>
<%= submit_tag("Search") %>
<% end %>
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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++ students_controller.rb
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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class StudentsController < ApplicationController
# GET /students
# GET /students.json
def index
@students = Student.all
@grades = Grade.find(:all)
@subjects = Subject.find(:all)
@sexes = Sex.find(:all)
respond_to do |format|
format.html # index.html.erb
format.json { render :json => @students }
end
end
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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++ student.rb (model)
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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class Student < ActiveRecord::Base
belongs_to :grade
belongs_to :subject
belongs_to :sex
validates :name, :presence => true
validates :grade_id, :presence => true
validates :sex_id, :presence => true
validates :subject_id, :presence => true
validates :fee, :presence => true
validates :address, :presence => true
def self.search(query)
where("name like ?", "%#{query}%")
end
end
---------------------------------------------------------------------------
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++ result.html.erb
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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<%= @students.inspect do |student| %>
<tr>
<td><%= student.name %></td>
<td><%= student.grade.grade %></td>
<td><%= student.sex.sex %></td>
<td><%= student.subject.subject %></td>
<td><%= student.fee %></td>
<td><%= student.address %></td>
</tr>
<% end %>
---------------------------------------------------------------------------
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++ search_controller.rb
---------------------------------------------------------------------------
---------------------------------------------------------------------------
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class SearchController < ApplicationController
def search
@students = Student.where(params[:search]).all
end
end
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