在 Rails 中按类别下拉搜索

Question

我目前正在尝试按类别功能实现简单的下拉搜索。 但是，我似乎遇到了一些问题——我的搜索功能似乎不起作用。 在我的 model 中搜索 function 是这样的：

class Image < ApplicationRecord
    belongs_to :user

    has_one_attached :image

    #validates :image, attached: true, content_type: %w(image/jpg image/jpeg image/png)

    def self.search(search)
        if search
            images = Image.all
            images = Image.where(meal_category: search[:":meal_category"][","])
            return images
        else
            Image.all
        end
    end

forms 看起来像这样：

<%= form_tag(images_path, method: "get") do %>
                  <select name= image[:thing], class=“form-control”>
                    <option value=“None”>Meal Category</option>
                    <option value=“Breakfast”>Breakfast</option>
                    <option value=“Lunch/Dinner”>Lunch/Dinner</option>
                    <option value=“Dessert”>Dessert</option>
                  </select>
                  <input type="submit" value="Submit">
                <%end%>

controller 看起来像这样：

class ImagesController < ApplicationController
  before_action :set_image, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!, except: [:show, :index, :submit]
  before_action :correct_user, only: [:edit, :update, :destroy]

  # GET /images
  # GET /images.json
  def index
    @images = Image.search(params[:thing])
  end

最后，我的路线配置如下：

Rails.application.routes.draw do
  resources :images
  devise_for :users
  get '/upload', to: 'images#new'
  root 'images#index'
  get "/search", to: "images#search"
  get '/@:username', to: 'users#show', as: :profile
  resources :images, only: [:index, :show, :create]

  delete 'images/:id(.:format)', :to => 'images#destroy'
end

似乎我的参数没有正确传递。 我尝试使用这些参数，但我未能确定问题所在。 任何帮助或见解将不胜感激。 提前致谢！

Answer 1

一些细微的变化，你能看看这是否更符合你的预期：

形式

<%= form_tag(images_path, method: "get") do |f| %>
  <%= select_tag(:thing, options_for_select(@select_options)) %>
  <%= submit_tag "Search" %>
<%end%>

controller

class ImagesController < ApplicationController
  before_action :set_image, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!, except: [:show, :index, :submit]
  before_action :correct_user, only: [:edit, :update, :destroy]

  # GET /images
  # GET /images.json
  def index
    @select_options = {
      "None": "Meal Category", 
      "Breakfast": “Breakfast”,
      "Lunch/Dinner": “Lunch/Dinner”,
      "Dessert": “Dessert”
    }
    @images = Image.all
    @images = @images.search(params[:thing]) if params[:thing] && params[:thing] != "None"
  end

class

class Image < ApplicationRecord
  belongs_to :user
  has_one_attached :image

  #validates :image, attached: true, content_type: %w(image/jpg image/jpeg image/png)

  scope :search, ->(search_text) {where(meal_category: search_text)}