腳本中的「ajax」向服務器發送帖子或刪除消息。包含ajax的javascript是添加複選框的。我們如何使創建的複選框元素持久化,以便用戶刷新頁面時仍然存在?如何使Javascript生成複選框持續?
習慣/ _form.html.erb
<label id="<%= @habit.id %>" class="habit-id"> Missed: </label>
<% @habit.levels.each_with_index do |level, index| %>
<% if @habit.current_level >= (index + 1) %>
<p>
<label id="<%= level.id %>" class="level-id"> Level <%= index + 1 %>: </label>
<%= check_box_tag nil, true, level.missed_days > 0, {class: "habit-check"} %>
<%= check_box_tag nil, true, level.missed_days > 1, {class: "habit-check"} %>
<%= check_box_tag nil, true, level.missed_days > 2, {class: "habit-check"} %>
</p>
<% end %>
<% end %>
habit.js
$(document).ready(function() {
var handleChange = function() {
habit = $(this).parent().prev().attr("id");
level = $('label', $(this).parent()).attr("id");
if ($(this).is(":checked")) {
$.ajax({
url: "/habits/" + habit + "/levels/" + level + "/days_missed",
method: "POST"
});
} else {
$.ajax({
url: "/habits/" + habit + "/levels/" + level + "/days_missed/1",
method: "DELETE"
});
}
if (!$('input[type="checkbox"]:not(:checked)', $(this).parent()).length) {
/* this is just an example, you will have to ammend this */
$(this).parent().append($('<input type="checkbox" class="habit-check">'));
$(this).parent().append($('<input type="checkbox" class="habit-check">'));
$(this).parent().append($('<input type="checkbox" class="habit-check">'));
$(".habit-check").on('change',handleChange);
}
}
$(".habit-check").on('change',handleChange);
});
habit.rb
class Habit < ActiveRecord::Base
belongs_to :user
has_many :comments, as: :commentable
has_many :levels
serialize :committed, Array
validates :date_started, presence: true
before_save :current_level
acts_as_taggable
scope :private_submit, -> { where(private_submit: true) }
scope :public_submit, -> { where(private_submit: false) }
attr_accessor :missed_one, :missed_two, :missed_three
def save_with_current_level
self.levels.build
self.levels.build
self.levels.build
self.levels.build
self.levels.build
self.save
end
def self.committed_for_today
today_name = Date::DAYNAMES[Date.today.wday].downcase
ids = all.select { |h| h.committed.include? today_name }.map(&:id)
where(id: ids)
end
def current_level_strike
levels[current_level - 1] # remember arrays indexes start at 0
end
def current_level
return 0 unless date_started
def committed_wdays
committed.map do |day|
Date::DAYNAMES.index(day.titleize)
end
end
def n_days
((date_started.to_date)..Date.today).count do |date|
committed_wdays.include? date.wday
end - self.missed_days
end
case n_days
when 0..9
1
when 10..24
2
when 25..44
3
when 45..69
4
when 70..99
5
else
6
end
end
end
days_missed_controller
class DaysMissedController < ApplicationController
before_action :logged_in_user, only: [:create, :destroy]
def create
habit = Habit.find(params[:habit_id])
habit.missed_days = habit.missed_days + 1
habit.save!
level = habit.levels.find(params[:level_id])
level.missed_days = level.missed_days + 1
level.save!
head :ok # this returns an empty response with a 200 success status code
end
def destroy
habit = Habit.find(params[:habit_id])
habit.missed_days = habit.missed_days - 1
habit.save
level = habit.levels.find(params[:level_id])
level.missed_days = level.missed_days - 1
level.save!
head :ok # this returns an empty response with a 200 success status code
end
end
這裏是它的要點:https://gist.github.com/RallyWithGalli/c66dee6dfb9ab5d338c2
請讓我知道如果你需要任何進一步的解釋,代碼或圖片:)
謝謝Juergen爲您精心設計的解釋:)我只是看不到我如何將它與我提供的代碼集成。你說它簡直令人難以置信,我當然希望你是對的。我把它放在habit.js的頂部嗎?我不熟悉JavaScript的內部工作原理。這是一種我還沒有教過自己的語言,但我希望在啓動我的應用程序之前完成這一功能。 –
我添加了一些粗略的集成提示。但是你也可能會想,如果你想將信息存儲在服務器上,並以類似的方式從這裏獲取信息(在創建讀取AJAX調用的複選框時)。 – Juergen
@ AnthonyGalli.com:抱歉忘了給你解決,我不知道,如果你沒有得到一個標誌。閱讀我以前的評論。 – Juergen