Yaroslav Shmarov
Posted on November 30, 2020
Software as a Service (SaaS) = leasing = access to software with an end date.
Client is charged to postpone the end date.
From this perspective, a "One-time payment" = subscription with lifetime access.
Minimalistic Database representation:
Example: Spotify subscription
In this case a user can buy a premium subscription for $12,11 for a limited time 1 month to remove adds.
Here's how it will work:
# user.rb
# email :string
# ends_at :datetime
def premium_price
# how much to charge for postponing ends_at
# always keep money in integer. last 2 digits are cents
1299.to_i
end
def premium_interval
# by how long to postpone the ends_at
# monthly or yearly or forever
1.month
end
def active_subscription?
ends_at > Time.now
end
def show_annoying_adds?
# business logic
unless active_subscription?
end
# charge.rb
# user_id :integer
# amount :integer # to track how much was paid at this moment of time
belongs_to :user
# charges_controller.rb
def create
@charge.amount = current_user.premium_price
# PAYMENT PROVIDER LOGIC GOES HERE
if @charge.save
current_user.update(ends_at: Time.now + current_user.premium_interval)
end
end
This way whenever a user makes a payment and creates a charge,
his subscription ends_at is set to a later date based on premium_interval.
Of course, in this simple example charges are not automatic and the user has to explicitly create a charge.
That's it! ðŸ¤
Liked this article? Please follow me! It will really motivate me to post more fun stuff!
Posted on November 30, 2020
Join Our Newsletter. No Spam, Only the good stuff.
Sign up to receive the latest update from our blog.
Related