I am new to ruby. I have a loop where i want to create a array:
@line_items.each do |i|
if @line_items[0].product.user.email == i.product.user.email
@foodio = i.product.user.email
else
@foodio[i] = i.product.user.email
end
end
In above code, i am checking, whether line_items a different users.
In first part, if all line_items have same users, email will be @foodio. But if users are different, @foodio[] will store emails of all users.
How to do this? Please help!
@foodio = @line_items.map{ |ln| ln.product.try(:user).try(:email) }.compact.uniq
Iterate through items and select the user mail. Compact method to delete the nil possibility (user without product or user without email). Last, uniq method to delete duplicates.
In this option @foodio is always an array
If you have validates of presence in your models, simply:
@foodio = @line_items.map{ |ln| ln.product.user.email }.uniq
There are various ways that you could do this but its easiest to break down into steps.
Firstly you can convert the array of line_items to an array of email strings using the map method:
emails = @line_items.map { |item| item.product.user.email }
(This assumes there are no nil values in for product or user).
You may have duplicates in this list so you can de-duplicate with the uniq method:
emails = emails.uniq
or just
emails.uniq!
Then you can apply the logic about all emails being the same (because in that case the list would contain exactly one item):
@foodio = emails.count == 1 ? emails[0] : emails
