Capybara / Ruby - Trying to return to the beginning of the loop when an error shows up - ruby

Question

I'm trying to return to the loop beginnig when an error shows up as the code below.
I'm using the command "next" when a casual error occurs but it is not coming back for the loop beginning.
describe 'Test', :test do
before(:each) do
visit '/admin'
end
it 'Adding new images' do
image = 'barcelona.jpg'
#imagem = Dir.pwd + '/spec/fixtures/' + image
produto = '1'
100.times do
visit '/admin/' + produto
if page.has_no_css?('#mensagem > h1')
within_frame(:xpath, "//*[#id='app-content']/main/div/iframe") do
find('#ctl00_Conteudo_tbxNome_txtId').set 'test_name'
find('#ctl00_Conteudo_BtnSalvar').click
if page.has_no_css?('#mensagem > h1')
find('#ctl00_Conteudo_tbxIdArquivoControle_lnkInserirArquivo').click
attach_file('ctl00_Conteudo_tbxIdArquivoControle_tbxArquivo', #imagem)
find('#ctl00_Conteudo_tbxIdArquivoControle_btnEnviar').click
if page.has_no_css?('#mensagem > h1')
find('#skuTabNavigation a[href="#tabImages"]').click
expect(page).to have_content image
puts 'Test ok'
else
puts 'Error was presented, starting over..'
next
end
else
puts 'Error was presented, starting over..'
next
end
end
else
puts 'Error was presented, starting over..'
next
end
end
end
end
I would like that every time when the system goes to "else" condition, it restart the loop.

Answer 1

I don't think there is a direct way to move back to the initial iteration of a loop. redo exists but it only moves you back to the current iteration.
In this case, you probably want to change the way you're looping so you can more easily control when to start/stop. For example:
i = 0
while i <= 100 do
if page.has_no_css?('#mensagem > h1')
i = 0
puts 'Error'
next
end
i += 1
end
So you don't have to reset the loop index and call puts each time you could rescue an error:
class MyError < StandardError; end
i = 0
while i <= 100 do
begin
if page.has_no_css?('#mensagem > h1')
raise MyError, 'thing was missing'
end
puts i
i += 1
rescue MyError => boom
puts "Error: #{boom.message}"
i = 0
redo
end
end