I created a follow/unfollow method in my rails application. It wasn't that difficult to implement, but the logic took a moment.
Migration
First I created the Follows Migration.
class CreateFollows < ActiveRecord::Migration[6.0]
def change
create_table :follows do |t|
t.belongs_to :user
t.belongs_to :post
t.timestamps
end
end
end
Models
Then I updated the models for user and post.
post.rb
#Follow Section
has_many :follows, dependent: :destroy
has_many :users, through: :follows
user.rb
has_many :follows
follow.rb
class Follow < ApplicationRecord
belongs_to :company
belongs_to :user
validates_uniqueness_of :user_id, :scope => :post_id
end
Views
Then I wanted to display a follow/unfollow button based off if a user was following or not in the view.
<%# Follow this post%>
<% if current_user.followed?(@post) %>
<%= button_to "unfollow", post_follows_path(@post.id), class: "myButton" %>
<% else %>
<%= button_to "follow", post_follows_path(@post.id), class: "myButton" %>
<% end %>
Model Method
I created the followed? method inside of my user controller so that it would work with the current_user logged in.
def followed?(post)
follow = Followed.find_by(user_id: self.id, post_id: post.id)
end
Routes (nested)
Lastly, I updated my route to have a nested route for the post:
resources :posts do
resources :follows, only: [:index, :create]
end
And that is it, a simple follow/unfollow function on my rails application.
Thanks for reading!
Sincerely,
Brittany
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