How does one use the Ruby on Rails method performed? in an if else statement?
I tried to use this StackOverflow anwser in my example below:
if condition
does something
elsif redirect_to(records_path)
performed?
does another thing
else
yet another thing
end
But this only redirects without checking if it is performed.
I want it to check if the redirect to records_path is performed and when true do something (or "does another thing" in my example)
I also tried this:
elseif records_path.performed?
And this:
elseif redirect_to(records_path) performed?()
And all things in between.
Can somebody explain how it's done and how I could've get it from the docs?
In a controller action, when we type render or redirect_to those are not immediately executed, but they are queued and will be executed after the completion of the method. So this allows to have double renders or redirect_to in a controller action, and this will generate an error (because then rails has no idea which to execute). So that is why in rails they have added a method performed? which will indicate if a render or redirect_to has already been called (queued) or not.
In most cases this is not really needed because normally your controller code is pretty simple.
To clarify: performed? does not actually test the redirect_to has been done, it just tests a render or redirect-to was called/queued. Furthermore the redirect_to does not return a boolean indicating whether it was done or not.
So your code should be like this:
if condition
does something
else
redirect_to(records_path)
end
if performed?
# the redirect-to was executed
does another thing # but not a render or redirect
else
yet another thing
# and could be a render or redirect
# if not the normal view will be rendered
end
Please not that in this simple example the performed? is just the negative of condition so you could easily squash those together.