Thanks for all the replies. It then works just as I had thought but I'm not getting the results that I expect so I need to look a bit further. But I now know that I am using the method correctly. Thanks once again,
On 18 May 2010 19:33, Michael Pavling <pavl...@gmail.com> wrote: > On 18 May 2010 07:41, Paul Jonathan Thompson <rails...@gmail.com> wrote: >> Mapper.exists?(product.id) >> >> How do I test if the condition returned was true or false? > > Most simply, you would use "if"... either by wrapping a conditional > block around code to run if the condition is met, or with a "guard" > clause. If the condition evaluates as true, then the code inside the > block (or being guarded) with run : > > if Mapper.exists?(product.id) > �...@mapper = Mapper.find(product.id) > end > > or > �...@mapper = Mapper.find(product.id) if Mapper.exists?(product.id) > > But there's plenty of other ways of logically checking conditions: > "unless" is equivalent to "if !" > Ternary operators are useful > "case" statements have their place. > "||=" is a lovely little Ruby idiom for checking for nil values. > > If you Google for "ruby conditional logic" you'll find lots of > beginners guides covering this material. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-t...@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
