我有一个应用程序，用户可以在其中提交一个新项目。提交后，他们可以选择编辑刚刚提交的项目。单击编辑时，它会再次弹出表单，并显示之前输入的所有数据。
我的问题在于允许用户选择许多技术的领域之一。它链接到另一个名为的表，该表保存表和表Projecttechnol之间的链接。当用户单击编辑按钮时，该项目所拥有的所有技术都不会显示出来。如果用户点击一项新技术并保存，则新技术保存，旧的仍然存在。TechnolProject
我对技术的编辑视图：
<%= fields_for(@project_technol) do |ab| %>
<%= ab.label "Choose Technologies"%> </br>
<%= collection_select( :technols, :id, Technol.all, :id, :tech, {}, {:multiple => true } ) %>
<% end %>
我的项目控制器：具有新的、编辑、创建和更新操作
def new
@project = Project.new
@technol = Technol.new(params[:tech])
@all_technols = Technol.all
tech_ids = params[:technols][:id].reject(&:blank?) unless params[:technols].nil?
@project_technol = @project.projecttechnols.build
respond_to do |format|
format.html # new.html.erb
format.json { render json: @project }
end
end
def edit
@project = Project.find(params[:id])
@project_technol = @project.projecttechnols.build
end
def create
@project = Project.new(params[:project])
@project.client = params[:new_client] unless params[:new_client].blank?
@technol.tech = params[:new_tech] unless params[:new_tech].blank?
@project.role = params[:new_role] unless params[:new_role].blank?
params[:technols][:id].each do |tech|
if !tech.empty?
@project_technol = @project.projecttechnols.build(:technol_id => tech)
end
end
respond_to do |format|
if @project.save
format.html { redirect_to @project, notice: 'Project was successfully created.' }
format.json { render json: @project, status: :created, location: @project }
else
format.html { render action: "new" }
format.json { render json: @project.errors, status: :unprocessable_entity }
end
end
end
def update
@project = Project.find(params[:id])
@project.client = params[:new_client] unless params[:new_client].blank?
@technol.tech = params[:new_tech] unless params[:new_tech].blank?
@project.role = params[:new_role] unless params[:new_role].blank?
params[:technols][:id].each do |tech|
if !tech.empty?
@project_technol = @project.projecttechnols.build(:technol_id => tech)
end
end
respond_to do |format|
if @project.update_attributes(params[:project])
format.html { redirect_to @project, notice: 'Project was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @project.errors, status: :unprocessable_entity }
end
end
end
我是rails的新手，所以任何帮助都将不胜感激，在此先感谢。
更新：这是我的项目模型
class Project < ActiveRecord::Base
attr_accessible :fullname, :edited_first_name, :edited_last_name, :first_name, :last_name, :business_div, :client, :customer_benefits, :edited_date, :end_date, :entry_date, :financials, :industry, :keywords, :lessons_learned, :project_name, :project_owner, :role, :start_date, :status, :summary, :tech , :technols, :technol_tokens
has_many :projecttechnols
has_many :technols, :through => :projecttechnols
accepts_nested_attributes_for(:technols)
更新2
参数：
{"utf8"=>"✓",
"_method"=>"put",
"authenticity_token"=>"+Fdh61iVz2IqZ+bNQz9SIa5ly7nNXaiCEr28hVWUxpM=",
"project"=>{"project_name"=>"Beverly",
"status"=>"Completed",
"client"=>"Qtjpa",
"business_div"=>"Ecbly",
"project_owner"=>"Qpzrv",
"start_date"=>"2012-10-15",
"edited_date"=>"2012-10-08",
"projecttechnols"=>{"id"=>["",
"41"]},
"role"=>"Ozeoe",
"industry"=>"Wjfiq",
"summary"=>"Eypriw lorem ipsum dolor sit amet,
consectetur adipisicing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
"lessons_learned"=>"Kbjuhy lorem ipsum dolor sit amet,
consectetur adipisicing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
"customer_benefits"=>"Fsonlw lorem ipsum dolor sit amet,
consectetur adipisicing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",,
"keywords"=>"Bwdtm"},
"new_client"=>"",
"new_business_div"=>"",
"new_project_owner"=>"",
"new_role"=>"",
"new_industry"=>"",
"commit"=>"Save Edit",
"id"=>"103"}