I have an Ant show page that displays detailed information about various types of ants. On that page there are two drop downs, one for environment: [indoor, outdoor], and one for diet: [sugar, fat, protein].
When you select a param from each it renders out a product page depending on the params. However, some combinations result in nil, like a carpenter ant doesn’t have a product associated with indoor, sugar.
I’m trying to get the dropdowns to populate based on whether or not a combination is nil. If someone selects indoor I’d like sugar to not appear in the next drop down if that combo doesn’t exist.
So far I have I have two methods creating json arrays for only the available items:
def food_sources
food_sources = Ant.find(params[:ant_id]).product_recommendations.where(environment: params[:environment]).map(&:diet)
render json: food_sources.to_json
end
def environments
environments = Ant.find(params[:ant_id]).product_recommendations.where(diet: params[:diet]).map(&:environment)
render json: environments.to_json
end
For example, if I input
http://localhost:3000/ants/27/food_sources?environment=indoor
into the browser it returns
["sugar","protein"]
bc for the ant with an id of 27 only has two options for outdoor indoor diets, instead of the possible three.
My question is how do I pass this array into my rails dropdown if someone picked the above combination? Right now my drop down looks a little like this:
= select_tag :environment, options_for_select([["Select One"], "Indoor", "Outdoor"])