GitHub 仓库：https://github.com/Yorkshireman/mywordlist https://github.com/Yorkshireman/mywordlist
我用谷歌搜索了一下这个。我确信有一种方法，可能需要在 html 选项哈希中添加一些代码，但我无法解决。有任何想法吗？
当访问具有一个或多个类别的 Word 的 _edit_word_form.html.erb 部分时，类别复选框全部未选中，要求用户再次选择它们，即使他们不想更改类别。
:title 和 :description 的文本字段是预先填充的（幸运的是）。
_edit_word_form.html.erb：
<%= form_for(@word) do %>
<%= fields_for :word, @word do |word_form| %>
<div class="field form-group">
<%= word_form.label(:title, "Word:") %><br>
<%= word_form.text_field(:title, id: "new_word", required: true, autofocus: true, class: "form-control") %>
</div>
<div class="field form-group">
<%= word_form.label(:description, "Definition:") %><br>
<%= word_form.text_area(:description, class: "form-control") %>
</div>
<% end %>
<%= fields_for :category, @category do |category_form| %>
<% if current_user.word_list.categories.count > 0 %>
<div class="field form-group">
<%= category_form.label(:title, "Choose from existing Categories:") %><br>
<%= category_form.collection_check_boxes(:category_ids, current_user.word_list.categories.all, :id, :title) do |b| %>
<%= b.label(class: "checkbox-inline") { b.check_box + b.text } %>
<% end %>
</div>
<% end %>
<h4>AND/OR...</h4>
<div class="field form-group">
<%= category_form.label(:title, "Create and Use a New Category:") %><br>
<%= category_form.text_field(:title, class: "form-control") %>
</div>
<% end %>
<div class="actions">
<%= submit_tag("Update!", class: "btn btn-block btn-primary btn-lg") %>
</div>
<% end %>
words/index.html.erb的相关部分：
<% current_user.word_list.words.alphabetical_order_asc.each do |word| %>
<tr>
<td>
<%= link_to edit_word_path(word) do %>
<%= word.title %>
<span class="glyphicon glyphicon-pencil"></span>
<% end %>
</td>
<td><%= word.description %></td>
<td>
<% word.categories.alphabetical_order_asc.each do |category| %>
<a class="btn btn-info btn-sm", role="button">
<%= category.title %>
</a>
<% end %>
</td>
<td>
<%= link_to word, method: :delete, data: { confirm: 'Are you sure?' } do %>
<span class="glyphicon glyphicon-remove"></span>
<% end %>
</td>
</tr>
<% end %>
单词控制器.rb：
class WordsController < ApplicationController
before_action :set_word, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!
# GET /words
# GET /words.json
def index
@words = Word.all
@quotes = Quote.all
end
# GET /words/1
# GET /words/1.json
def show
end
# GET /words/new
def new
@word = current_user.word_list.words.build
end
# GET /words/1/edit
def edit
end
# POST /words
# POST /words.json
def create
@word = Word.new(word_params)
respond_to do |format|
if @word.save
format.html { redirect_to @word, notice: 'Word was successfully created.' }
format.json { render :show, status: :created, location: @word }
else
format.html { render :new }
format.json { render json: @word.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /words/1
# PATCH/PUT /words/1.json
def update
#need to first remove categories from the word
@word.categories.each do |category|
@word.categories.delete category
end
#then push categories in from the category_params
if params["category"].include?(:category_ids)
(params["category"])["category_ids"].each do |i|
next if i.to_i == 0
@word.categories << Category.find(i.to_i) unless @word.categories.include?(Category.find(i.to_i))
end
end
if category_params.include?(:title) && ((params["category"])["title"]) != ""
@word.categories << current_user.word_list.categories.build(title: (params["category"])["title"])
end
respond_to do |format|
if @word.update(word_params)
format.html { redirect_to words_path, notice: 'Word was successfully updated.' }
format.json { render :show, status: :ok, location: @word }
else
format.html { render :edit }
format.json { render json: @word.errors, status: :unprocessable_entity }
end
end
end
# DELETE /words/1
# DELETE /words/1.json
def destroy
@word.destroy
respond_to do |format|
format.html { redirect_to words_url, notice: 'Word was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_word
@word = Word.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def word_params
params.require(:word).permit(:title, :description, :category_ids)
end
def category_params
params.require(:category).permit(:title, :category_ids, :category_id)
end
end
类别_控制器.rb：
class CategoriesController < ApplicationController
before_action :set_category, only: [:show, :edit, :update, :destroy]
# GET /categories
# GET /categories.json
def index
@categories = Category.all
end
# GET /categories/1
# GET /categories/1.json
def show
end
# GET /categories/new
def new
@category = current_user.word_list.categories.build
end
# GET /categories/1/edit
def edit
end
# POST /categories
# POST /categories.json
def create
@category = Category.new(category_params)
respond_to do |format|
if @category.save
format.html { redirect_to @category, notice: 'Category was successfully created.' }
format.json { render :show, status: :created, location: @category }
else
format.html { render :new }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /categories/1
# PATCH/PUT /categories/1.json
def update
respond_to do |format|
if @category.update(category_params)
format.html { redirect_to @category, notice: 'Category was successfully updated.' }
format.json { render :show, status: :ok, location: @category }
else
format.html { render :edit }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
# DELETE /categories/1
# DELETE /categories/1.json
def destroy
@category.destroy
respond_to do |format|
format.html { redirect_to categories_url, notice: 'Category was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_category
@category = Category.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def category_params
params.require(:category).permit(:title, :word_list_id, :category_ids)
end
end
word_lists_controller.rb：
class WordListsController < ApplicationController
before_action :set_word_list, only: [:show, :edit, :update, :destroy]
def from_category
@selected = current_user.word_list.words.joins(:categories).where( categories: {id: (params[:category_id])} )
respond_to do |format|
format.js
end
end
def all_words
respond_to do |format|
format.js
end
end
# GET /word_lists
# GET /word_lists.json
def index
@word_lists = WordList.all
end
# GET /word_lists/1
# GET /word_lists/1.json
def show
@words = Word.all
@word_list = WordList.find(params[:id])
end
# GET /word_lists/new
def new
@word_list = WordList.new
end
# GET /word_lists/1/edit
def edit
end
# POST /word_lists
# POST /word_lists.json
def create
@word_list = WordList.new(word_list_params)
respond_to do |format|
if @word_list.save
format.html { redirect_to @word_list, notice: 'Word list was successfully created.' }
format.json { render :show, status: :created, location: @word_list }
else
format.html { render :new }
format.json { render json: @word_list.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /word_lists/1
# PATCH/PUT /word_lists/1.json
def update
respond_to do |format|
if @word_list.update(word_list_params)
format.html { redirect_to @word_list, notice: 'Word list was successfully updated.' }
format.json { render :show, status: :ok, location: @word_list }
else
format.html { render :edit }
format.json { render json: @word_list.errors, status: :unprocessable_entity }
end
end
end
# DELETE /word_lists/1
# DELETE /word_lists/1.json
def destroy
@word_list.destroy
respond_to do |format|
format.html { redirect_to word_lists_url, notice: 'Word list was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_word_list
@word_list = WordList.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def word_list_params
params[:word_list]
end
end
单词列表.rb：
class WordList < ActiveRecord::Base
belongs_to :user
has_many :words
has_many :categories
end
word.rb:
class Word < ActiveRecord::Base
belongs_to :word_list
has_and_belongs_to_many :categories
validates :title, presence: true
scope :alphabetical_order_asc, -> { order("title ASC") }
end
类别.rb：
class Category < ActiveRecord::Base
has_and_belongs_to_many :words
belongs_to :word_list
validates :title, presence: true
scope :alphabetical_order_asc, -> { order("title ASC") }
end
架构.rb：
ActiveRecord::Schema.define(version: 20150609234013) do
create_table "categories", force: :cascade do |t|
t.string "title"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "word_list_id"
end
add_index "categories", ["word_list_id"], name: "index_categories_on_word_list_id"
create_table "categories_words", id: false, force: :cascade do |t|
t.integer "category_id"
t.integer "word_id"
end
add_index "categories_words", ["category_id"], name: "index_categories_words_on_category_id"
add_index "categories_words", ["word_id"], name: "index_categories_words_on_word_id"
create_table "quotes", force: :cascade do |t|
t.text "content"
t.string "author"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "users", ["email"], name: "index_users_on_email", unique: true
add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
create_table "word_lists", force: :cascade do |t|
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
end
create_table "words", force: :cascade do |t|
t.string "title"
t.text "description"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "word_list_id"
end
add_index "words", ["word_list_id"], name: "index_words_on_word_list_id"
end
路线.rb：
Rails.application.routes.draw do
resources :quotes
resources :categories
resources :words
devise_for :users, controllers: { registrations: "users/registrations" }
# The priority is based upon order of creation: first created -> highest priority.
# See how all your routes lay out with "rake routes".
# You can have the root of your site routed with "root"
# root 'welcome#index'
root 'pages#home'
post 'create_word_and_category' => 'new_word#create_word_and_category'
end
