i'm trying to Add Categories to my Rails app, but don't quite know how to do this.
I have many Pins(Images) and want the user to be able to assign a category on those Pins. ASSIGN not create, edit, or delete a Category, just selecting one for their Pin. Meaning that, When a user uploads a pin, he can choose from a dropdown list a Category.
Then, another user can choose from the Menu a Category, and ONLY the Pins in this Category will be listed.
How do i do this? Where to start ?
Thank you
First If you don't want to manage categories in your application, then you can simply add a category field in your table and category select in your application :
<%= f.select :category, [ 'Box', 'Cover', 'Poster' ], :prompt => 'Select One' %>
Second, If you want to manage categories in your application, than you have to maintain a separate model and table for it. So you can start with generating your model:
rails g model category
it will add model and migration in your application directory. Add stuff to your migration:
class CreateCategories < ActiveRecord::Migration
def change
create_table :categories do |t|
t.string :name
t.text :description
## you can add more stuff as per your requirements
t.timestamps
end
end
end
Define associations in category & Pin model add validation for this :-
In Category Model:
has_many :pins
In Pin Model :
belongs_to :category
validates :category, presence: true
Create some categories by categories controller and form (I don't think, I need to tell you that stuff, you are able to do it yourself)
In your pin uploading form add this select :-
<%= f.select :category, Category.all, :prompt => "Select One" %>
Hope, It will help.
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