[RUBY] List the contents of categories created with Active Hash


Thing you want to do

--List the contents associated with each category created by Active Hash


--Set up routing --Make a link --Write the action in the controller --Create the corresponding view

As a prerequisite, it is assumed that the installation of Active Hash and the settings around the model / DB have been completed.

Set up routing

Since the Item model has category_id, set the routing as follows


get '/items/category/:id', to: "items#category"

Make a link

Make a link.


link_to 'hoge', '/items/category/1'
link_to 'fuga', '/items/category/2'
link_to 'piyo', '/items/category/3'

By the way, the Category model is set like this


class Category < ActiveHash::Base
  self.data = [
    { id: 1, name: 'hoge' },
    { id: 2, name: 'fuga' },
    { id: 3, name: 'piyo' }

Write the action in the controller

category Defines an action.


def category
  @item = Item.find_by(category_id: params[:id])
  @items = Item.where(category_id: params[:id]).order('created_at DESC')

@Item is defined to display the category name on the category list page, and @items is defined to expand with each.

Make a corresponding view

Create category.html.erb under items.


#Display of category name
#Expand the contents of the category
  @items.each do |item|
~ Omitted ~

in conclusion

I think I could write it quite easily by passing each id with link_to. Please let me know if there is a better way!


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