How to send mail related to a category - ruby-on-rails

Question

So, I have 3 models Quotes, Categories, and Subscribers.
Essentially, it's a newsletter application. Subscribers can select a category and then enter their email and they will receive quotes related to that category via email.
There's two issues here,
1. The category's are stored in a constant in the category model.
so how do I display the category type that the subscriber chose
in text format? I'd like to show in the email
something like "here's your email on <%= category.name %>" which would translate to
"here's your email on Food."
2. I'd like to ONLY send emails about the category that the subscriber subscribed to.
How might I accomplish this? Please provide examples.
This is what I have so far:
Category.rb
class Category < ActiveRecord::Base
belongs_to :quote
belongs_to :subscriber
CATEGORY_TYPE = {
1 => "Food",
2 => "Fitness",
3 => 'Cats',
}
end
Quote.rb
class Quote < ActiveRecord::Base
has_many :categories
belongs_to :category
validates :title, presence: true
end
Subscriber.rb
class Subscriber < ActiveRecord::Base
has_one :category
validates :email, presence: true
end
schema
create_table "categories", force: true do |t|
t.string "name"
t.integer "quote_id"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "subscriber_id"
t.integer "category_type"
end
create_table "quotes", force: true do |t|
t.string "title"
t.text "body"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "subscribers", force: true do |t|
t.string "email"
t.datetime "created_at"
t.datetime "updated_at"
end
Update subscribers_mailer.rb
def SendMyEmail(email, category, quote, subscribers)
#category = category
#quote = quote
#subscribers = subscribers
#email = email
mail to: email, subject: 'New Quotes'
end
end
and then of course:
Category.all.each do |category|
SubscriptionMailer.SendMyEmail("email#test.com", category, category.quotes.first, category.subscribers).deliver
end
Update:
There's two remaining issues here,
1. Categories aren't syncing to subscribers. For example when I run category.subscribers.last
it's nil. and category.subscribers throws an empty array. How can I sync these? I think it has
to do with the fact that subscribers are selecting a category from the Category::CATEGORY_TYPES
constant as seen in the view code below.
2. I'd like to automate it so that these emails are sent to subscribers once a day.
How might I do this?
view code (subscribers/new.html.erb:
<div class="styled email-input2">
<%= form_for #subscriber do |f| %>
<% if #subscriber.errors.any? %>
<div class="errorExplanation" style="color: white;">
<h2><%= pluralize(#subscriber.errors.count, 'error') %> encountered:</h2>
<ul>
<% #subscriber.errors.full_messages.each do |m| %>
<li><%= m %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.fields_for :subscriber, #subscriber.build_category do |cat| %>
<%= cat.select(:category_type, Category::CATEGORY_TYPE.map{|p| [p[1], p[0]]}, {prompt: 'Please select'}, {class: 'styled email-input2'}) %>
<% end %>
</div>

Answer 1

Ok first lets modify the migrations:
create_table "categories", force: true do |t|
#DELETE QUOTE_ID AND SUBSCRIBER ID
t.string "name"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "category_type"
end
create_table "quotes", force: true do |t|
t.string "title"
t.text "body"
t.datetime "created_at"
t.datetime "updated_at"
t.references :category #this will add integer category_id
end
create_table "subscribers", force: true do |t|
t.string "email"
t.datetime "created_at"
t.datetime "updated_at"
t.references :category #this will add integer category_id
end
Next we will modify the models to reflet the changes in the migration:
class Category < ActiveRecord::Base
has_many :quotes
has_many :subscribers
CATEGORY_TYPE = {
1 => "Food",
2 => "Fitness",
3 => 'Cats',
}
end
class Quote < ActiveRecord::Base
belongs_to :category
validates :title, presence: true
end
class Subscriber < ActiveRecord::Base
belongs_to :category
validates :email, presence: true
end
Now you can get the subscribers for a cateogyr using the following:
category = Category.find(1) #use whatever id you want
category.subscribers #list of all subscribers for a category
Getting the quotes for a category is similarly straight forward:
category = Category.find(1)
category.quotes
So assuming your mailer takes a category, quote and a list of subscribers for the email to send
Category.all.each do |category|
Mailer.SendMyEmail(category, category.quotes.first, category.subscribers).deliver
end
In the "SendMyEmail" function in your mailer you will have
def SendMyEmail(category, quote, subscribers)
#YOUR CODE FOR TYHE VIEW HERE
end