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Maybe/app/models/account/holding.rb
Zach Gollwitzer d75be2282b
New Design System + Codebase Refresh (#1823)
Since the very first 0.1.0-alpha.1 release, we've been moving quickly to add new features to the Maybe app. In doing so, some parts of the codebase have become outdated, unnecessary, or overly-complex as a natural result of this feature prioritization.

Now that "core" Maybe is complete, we're moving into a second phase of development where we'll be working hard to improve the accuracy of existing features and build additional features on top of "core". This PR is a quick overhaul of the existing codebase aimed to:

- Establish the brand new and simplified dashboard view (pictured above)
- Establish and move towards the conventions introduced in Cursor rules and project design overview #1788
- Consolidate layouts and improve the performance of layout queries
- Organize the core models of the Maybe domain (i.e. Account::Entry, Account::Transaction, etc.) and break out specific traits of each model into dedicated concerns for better readability
- Remove stale / dead code from codebase
- Remove overly complex code paths in favor of simpler ones
2025-02-21 11:57:59 -05:00

65 lines
1.6 KiB
Ruby

class Account::Holding < ApplicationRecord
include Monetizable
monetize :amount
belongs_to :account
belongs_to :security
validates :qty, :currency, :date, :price, :amount, presence: true
validates :qty, :price, :amount, numericality: { greater_than_or_equal_to: 0 }
scope :chronological, -> { order(:date) }
scope :for, ->(security) { where(security_id: security).order(:date) }
delegate :ticker, to: :security
def name
security.name || ticker
end
def weight
return nil unless amount
return 0 if amount.zero?
account.balance.zero? ? 1 : amount / account.balance * 100
end
# Basic approximation of cost-basis
def avg_cost
avg_cost = account.entries.account_trades
.joins("INNER JOIN account_trades ON account_trades.id = account_entries.entryable_id")
.where("account_trades.security_id = ? AND account_trades.qty > 0 AND account_entries.date <= ?", security.id, date)
.average(:price)
Money.new(avg_cost || price, currency)
end
def trend
@trend ||= calculate_trend
end
def trades
account.entries.where(entryable: account.trades.where(security: security)).reverse_chronological
end
def destroy_holding_and_entries!
transaction do
account.entries.where(entryable: account.trades.where(security: security)).destroy_all
destroy
end
account.sync_later
end
private
def calculate_trend
return nil unless amount_money
start_amount = qty * avg_cost
Trend.new \
current: amount_money,
previous: start_amount
end
end