ActiveRecord: Adding condition to ON clause for includes

Question

I have a model offers and another historical_offers, one offer has_many historical_offers.

Now I would like to eager load the historical_offers of one given day for a se

Answer 1

After a few hours headscratching and trying all sorts of ways to accomplish eager loading of a constrained set of associated records I came across @dbenhur's answer in this thread which works fine for me - however the condition isn't something I'm passing in (it's a date relative to Date.today). Basically it is creating an association with the conditions I wanted to put into the LEFT JOIN ON clause into the has_many condition.

has_many :prices, order: "rate_date"
has_many :future_valid_prices,
    class_name: 'Price',
    conditions: ['rate_date > ? and rate is not null', Date.today-7.days]

And then in my controller:

@property = current_agent.properties.includes(:future_valid_prices).find_by_id(params[:id])