在rails应用程序中创建类别

Question

我想在我的应用程序中创建分类:我受到this question的启发

但是当@RailsGuy说：“按类别、控制器和表单创建一些类别(我不认为，我需要告诉你，你可以自己做)”我感到迷茫.

我如何在哪里创建我的分类列表？狗猫鸟..。我看到它可以在控制台中完成，但是我会为每个类别显示不同的图片.

这是我的_form.html.slim

= simple_form_for @tuto do |f|
  - if @tuto.errors.any?
    #error_explanation
      h2 = "#{pluralize(@tuto.errors.count, "error")} prohibited this tuto from being saved:"
      ul
        - @tuto.errors.full_messages.each do |message|
          li = message
  = f.hidden_field :user_id, value: current_user.id
  = f.input  :title
  = f.collection_select :category_id, Category.all, :id, :name, {prompt: "Choose Category"}
  = f.input :content, as: :text, input_html: { rows: "15" }
  = f.button :submit, "Save"

my models:

tuto_model.rb

class Tuto < ActiveRecord::Base
  acts_as_votable
  belongs_to :user
  belongs_to :category
  validates :category, presence: true
end

categoty_model.rb

class Category < ActiveRecord::Base
  has_many :tutos
end

schema.rb

ActiveRecord::Schema.define(version: 20160920133801) do

  create_table "categories", force: :cascade do |t|
    t.string   "name"
    t.text     "description"
    t.string   "image"
    t.datetime "created_at",  null: false
    t.datetime "updated_at",  null: false
  end

  create_table "tutos", force: :cascade do |t|
    t.datetime "created_at",  null: false
    t.datetime "updated_at",  null: false
    t.string   "title"
    t.text     "content"
    t.integer  "user_id"
    t.integer  "category_id"
  end

  add_index "tutos", ["user_id"], name: "index_tutos_on_user_id"

  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
    t.string   "first_name"
    t.string   "last_name"
    t.boolean  "admin"
  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 "votes", force: :cascade do |t|
    t.integer  "votable_id"
    t.string   "votable_type"
    t.integer  "voter_id"
    t.string   "voter_type"
    t.boolean  "vote_flag"
    t.string   "vote_scope"
    t.integer  "vote_weight"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

  add_index "votes", ["votable_id", "votable_type", "vote_scope"], name: "index_votes_on_votable_id_and_votable_type_and_vote_scope"
  add_index "votes", ["voter_id", "voter_type", "vote_scope"], name: "index_votes_on_voter_id_and_voter_type_and_vote_scope"

end

非常感谢你的帮助

Answer 1

将图片存储在资产中。在表单/视图中使用条件？：

<% if tuto.category == dog %> <%= image_tag 'dog.jpg' %> <% end %>

像那样吗？

史蒂夫。

Answer 2

另一篇文章说使用控制器和表单来创建新的类别。如果使用脚手架创建模型类别，则控制器中将包含new & create操作，以及new.html.erb和index.html.erb (如果使用该操作的话，则为or.slim)。

您可以在其中创建您的类别，然后在您的Tuto模型中选择一个。

讲得通?

史蒂夫。