我是Javascript的新手，正在开发一个Rails项目，通过使用以下代码双击页面，允许在页面上放置其他文本字段：
<script type="text/javascript">
$(document).ready(function(){
var counter = 2;
$(document).dblclick(function () {
if(counter>35){
alert("You have exceeded the maximum allowable text fields");
return false;
}
var newTextBoxDiv = $(document.createElement('div'))
.attr("id", 'TextBoxDiv' + counter);
newTextBoxDiv.after().html('<input type="textbox" name="text' + counter +
'" id="document[text' + counter + ']" >');
newTextBoxDiv.appendTo("#TextBoxesGroup");
counter++;
});
$("#removeButton").click(function () {
if(counter==1){
alert("No more textbox to remove");
return false;
}
counter--;
$("#TextBoxDiv" + counter).remove();
});
$("#getButtonValue").click(function () {
var msg = '';
for(i=1; i<counter; i++){
msg += "\n Textbox #" + i + " : " + $('#textbox' + i).val();
}
alert(msg);
});
});
</script>
</head><body>
<div id='TextBoxesGroup'>
<div id="TextBoxDiv1">
<input type='textbox' id='text1' name="document[text1]" >
</div>
</div>
<input type='button' value='Remove Button' id='removeButton'>
<input type='button' value='Get TextBox Value' id='getButtonValue'>
除了动态创建的字段不保存到数据库之外，一切似乎都运行得很好。我确实检查了动态创建的字段是否为我的模型正确格式化，并且模型的参数允许其他字段。我对SO进行了一些研究，但似乎大多数答案都是针对其他用例 - 我确定我所缺少的内容非常小，但我很难在我的身上找到它。拥有。非常感谢方向！
修改
评论要求的扩展代码：
我的edit观点：
<%= form_for(@document) do |f| %>
<% if @document.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@document.errors.count, "error") %> prohibited this document from being saved:</h2>
<ul>
<% @document.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<script src="\assets\json2.min.js"></script>
<link href="\assets\jquery.signaturepad.css" rel="stylesheet">
<!-- <script type="text/javascript">
$(window).load(function(){
$('#instructionsModal').modal('show');
});
</script> -->
<div class="center">
<nav class="navbar navbar-default">
<button class="btn btn-success btn-lg text-center navbutton" type="button" data-toggle="modal" data-target="#signatureModal">Complete and Sign</button>
</nav>
</div>
<canvas>
</canvas>
<div class="transfield">
<%= f.label :signature %><br>
<%= f.text_field :signature, :class => 'transfield' %>
</div>
<div class="transfield">
<%= f.label :date %><br>
<%= f.date_field :date, :class => 'transfield' %>
</div>
<div class="transfield">
<%= f.label :text1 %><br>
<%= f.text_area :text1, :class => 'transfield' %>
</div>
<div class="transfield">
<%= f.label "Recipient" %><br>
<%= f.text_field :recipient, :class => 'transfield' %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<!--<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>-->
<script type="text/javascript">
$(document).ready(function(){
var counter = 2;
$(document).dblclick(function () {
if(counter>35){
alert("You have exceeded the maximum allowable text fields");
return false;
}
var newTextBoxDiv = $(document.createElement('div'))
.attr("id", 'TextBoxDiv' + counter);
newTextBoxDiv.after().html('<input type="textbox" name="text' + counter +
'" id="document[text' + counter + ']" >');
newTextBoxDiv.appendTo("#TextBoxesGroup");
counter++;
});
$("#removeButton").click(function () {
if(counter==1){
alert("No more textbox to remove");
return false;
}
counter--;
$("#TextBoxDiv" + counter).remove();
});
$("#getButtonValue").click(function () {
var msg = '';
for(i=1; i<counter; i++){
msg += "\n Textbox #" + i + " : " + $('#textbox' + i).val();
}
alert(msg);
});
});
</script>
</head><body>
<div id='TextBoxesGroup'>
<div id="TextBoxDiv1">
<input type='textbox' id='text1' name="document[text1]" >
</div>
</div>
<input type='button' value='Remove Button' id='removeButton'>
<input type='button' value='Get TextBox Value' id='getButtonValue'>
我的控制器：
class DocumentsController < ApplicationController
before_filter :authenticate_user!, except: [:edit, :update]
before_action :set_document, only: [:show, :edit, :update, :destroy]
# GET /documents
# GET /documents.json
def index
@documents = current_user.documents.order("created_at DESC").paginate(:page => params[:page], :per_page => 15)
end
# GET /documents/1
# GET /documents/1.json
def show
respond_to do |format|
format.html
format.pdf do
end
end
end
# GET /documents/new
def new
if current_user.subscribed?
@document = Document.new
@document.user_id = current_user.id
@available_templates = @current_user.templates.map{|tmplt| [tmplt.name, tmplt.id]}
else
redirect_to new_charge_path
end
end
# GET /documents/1/edit
def edit
#if @cms484.phy_sign.present?
#redirect_to pages_error_path
#else
#@document = Document.find_by(authentication_token: params[:authentication_token], id: params[:id])
# end
end
# POST /documents
# POST /documents.json
def create
@document = @document = Document.new(document_params)
@document.user_id = current_user.id
respond_to do |format|
if @document.save
DocumentMailer.email(@document).deliver_later
format.html { redirect_to documents_path, notice: 'Document was successfully created.' }
format.json { render :show, status: :created, location: @document }
else
format.html { render :new }
format.json { render json: @document.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /documents/1
# PATCH/PUT /documents/1.json
def update
respond_to do |format|
if @document.update(document_params)
format.html { redirect_to @document, notice: 'Document was successfully updated.' }
format.json { render :show, status: :ok, location: @document }
else
format.html { render :edit }
format.json { render json: @document.errors, status: :unprocessable_entity }
end
end
end
# DELETE /documents/1
# DELETE /documents/1.json
def destroy
@document.destroy
respond_to do |format|
format.html { redirect_to documents_url, notice: 'Document was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_document
@document = Document.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def document_params
params.require(:document).permit(:template_id, :recipient, :text2, :user_id, :signature, :date, :text1)
end
end
我的模特：
class Document < ActiveRecord::Base
belongs_to :user
belongs_to :template
before_create :add_token
private
def add_token
begin
self.authentication_token = SecureRandom.hex[0,10].upcase
end while self.class.exists?(authentication_token: authentication_token)
end
end