我有一个允许用户将项目输入数据库的应用程序。
他们可以选择通过文本框为某个字段输入新数据，也可以通过下拉菜单选择之前为该字段输入的数据。
如果用户填写表单，然后单击提交，但出现问题，比如他们错过了其中一个字段，页面会标记一个错误，说明缺少哪些字段，这很好。
但是，如果用户在文本框中输入了新数据，则会将其删除，并选择下拉列表中的第一个选项。
这是我的项目控制器：
class ProjectsController < ApplicationController
before_filter :authenticate_user!
#:except => [:show, :index]
def index
@projects = Project.all
respond_to do |format|
format.html # index.html.erb
format.json { render :json => @projects }
end
end
# GET /projects/1
# GET /projects/1.json
def show
@project = Project.find(params[:id])
@project_project_id = params[:id]
respond_to do |format|
format.html # show.html.erb
format.json { render json: @project }
end
end
# GET /projects/new
# GET /projects/new.json
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
# GET /projects/1/edit
def edit
@project = Project.find(params[:id])
@project_technol = @project.projecttechnols.build
puts @project.inspect
puts @project.technols.inspect
end
# POST /projects
# POST /projects.json
def create
@project = Project.new(params[:project])
@project.client = params[:new_client] unless params[:new_client].blank?
@project.role = params[:new_role] unless params[:new_role].blank?
@project.industry = params[:new_industry] unless params[:new_industry].blank?
@project.business_div = params[:new_business_div] unless params[:new_business_div].blank?
if !params[:technols].nil?
params[:technols][:id].each do |tech|
if !tech.empty?
@project_technol = @project.projecttechnols.build(:technol_id => tech)
end
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
# PUT /projects/1
# PUT /projects/1.json
# PUT /projects/1
# PUT /projects/1.json
def update
@project = Project.find(params[:id])
puts @project.inspect
puts @project.technols.inspect
@project.client = params[:new_client] unless params[:new_client].blank?
@project.role = params[:new_role] unless params[:new_role].blank?
@project.industry = params[:new_industry] unless params[:new_industry].blank?
@project.business_div = params[:new_business_div] unless params[:new_business_div].blank?
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
# DELETE /projects/1
# DELETE /projects/1.json
def destroy
@project = Project.find(params[:id])
@project.destroy
respond_to do |format|
format.html { redirect_to projects_url }
format.json { head :no_content }
end
end
private
helper_method :sort_column, :sort_direction
def sort_column
Project.column_names.include?(params[:sort]) ? params[:sort] : "project_name"
end
def sort_direction
%w[asc desc].include?(params[:direction]) ? params[:direction] : "asc"
end
def per_page
params[:per_page] ||= 1
end
def page
params[:page] ||= 1
end
end
这是我的一些新项目视图
<%= stylesheet_link_tag "new" %>
<h1>Create New Project</h1>
<HTML>
<%= stylesheet_link_tag "form" %>
<%= form_for(@project) do |f| %>
<% if @project.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@project.errors.count, "error") %> prohibited this project from being saved:</h2>
<ul>
<% @project.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<CENTER>
<div id = "project_name">
<div class="project_name">
Project Name:
<%= f.text_field :project_name,:maxlength => 30 %>
</div>
</div>
<div id ="smallbox">
<div id = "status">
<div class="status">
<%= f.label :status %> :
<%#= f.select :status, [['Active'],['Completed']], {:include_blank => true} %>
<%= f.select :status, [['Active'],['Completed']] %>
</div></div>
<div class="client" STYLE="text-align: left;">
<%= label_tag :new_client, "Client" %><br/>
<%= text_field_tag :new_client, nil, :maxlength => 30 %>
Or
<%= f.select( :client, Project.all.map {|p| [p.client]}.uniq, :prompt => "Select previous..") %>
</div>
<div class="business_div" STYLE="text-align: left;">
<%= label_tag :new_business_div, "Business Division" %><br/>
<%= text_field_tag :new_business_div, nil, :maxlength => 30 %>
Or
<%= f.select( :business_div, Project.all.map {|p| [p.business_div]}.uniq, :prompt => "Select previous") %>
</div>
<div class="start_date" STYLE="text-align: left;">
<b>Start Date:</b>
<%= f.text_field :start_date, :class => 'datepicker', :style => 'width: 80px;' %>
</div>
</P>
<div class="create_button">
<div class="actions">
<%= f.submit "Save New Project", :class => "button", :confirm => "Are you sure you want to save the new project?" %>
</div>
</div>
</div> <%#= small div %>
<% end %>
<div class="back_button2">
<%= button_to "Back", projects_path , :class => "button", :method => "get" %>
</div>
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, :role, :start_date, :status, :summary, :technol_ids, :tech , :technols
validates_presence_of :business_div, :client, :customer_benefits, :end_date, :financials, :industry, :lessons_learned, :project_name, :role, :start_date, :status, :summary #, :keywords
validates_format_of :industry, :with => /\A[^\d]+\Z/, :message => "field should only have letters"
validates_format_of :business_div, :with => /\A[^\d]+\Z/, :message => "field should only have letters"
validates_format_of :client, :with => /\A[^\d]+\Z/, :message => "field should only have letters"
validates_format_of :exception_pm, :with => /\A[^\d]+\Z/, :message => "field should only have letters"
validates_format_of :project_owner, :with => /\A[^\d]+\Z/, :message => "field should only have letters"
validates_format_of :role, :with => /\A[^\d]+\Z/, :message => "field should only have letters"
has_many :projecttechnols
has_many :technols, :through => :projecttechnols
def set_fullname(a, b)
fullname = [a, b].join(' ')
end
accepts_nested_attributes_for(:technols)
end
如果我需要包括其他任何内容，请告诉我。我已经被这个问题困扰了一段时间了。先感谢您。