I''ve read the wiki and Agile and can''t find the answer. When using script/runner I''ve gotten simple model functions similar to the -help example to run: $script/runner ''puts Vendor.find(1).name3'' where Vendor is a model. However when I try to run a function in a controller it doesn''t work: $script/runner ''puts ApplicationHelper.money(100)'' script/runner:29: undefined method `money'' for ApplicationHelper:Module (NoMethodError) I''m sure there is a simple solution to this. More generally, does script/runner look in every class in the application to try and find the referenced class? -- Posted with http://DevLists.com. Sign up and save your mailbox.
On May 29, 2006, at 09:44 AM, Richard Williams wrote:> I''ve read the wiki and Agile and can''t find the answer. > > When using script/runner I''ve gotten simple model functions similar to > the -help example to run: > > $script/runner ''puts Vendor.find(1).name3'' > > where Vendor is a model. > > However when I try to run a function in a controller it doesn''t work: > > $script/runner ''puts ApplicationHelper.money(100)'' > script/runner:29: undefined method `money'' for > ApplicationHelper:Module > (NoMethodError) > > I''m sure there is a simple solution to this.You''ve actually got two separate problems here: First, you say that you want to use script/runner to execute a Controller method. But Controller methods are executed in the context of an HTTP request, which script/runner doesn''t know how to set-up. However, you could easily create a class, say inside the lib folder, with a method that mimicked what your Controller action does, without needing the HTTP request environment. Then you would be able to call that method from script/runner. Also, make sure you prepend "self." onto the name of the method, since you won''t first be instantiating an object of that class before you try to call the method. Second, Helper methods aren''t actually part of your Controllers. They are modules that get mixed in to the View rendering step, so that your view templates can call them. Until they are included, their methods really aren''t accessible, since they were never designed to be called from outside the including View''s context.> More generally, does script/runner look in every class in the > application to try and find the referenced class?When you execute script/runner from the command line you are actually launching an instance of your Rails app. The first thing that ruby does is load all of your application''s code into memory, which then makes all of your classes, and their methods, available for you to reference. However, that doesn''t mean that you can call all of them from a command line context. As I''ve explained above, some methods need to be invoked in certain ways in order for them to function properly. The script/runner program gives you a way to access the business logic (this is the code that you add to your Model classes) from outside the web/http context that they are normally accessed through. It''s one of the best ways to run periodic routines that need to check the data of your app (eg. expiring ActiveRecord session table objects, based on their last modified time), as well as a great way to batch run certain processes, like data imports and exports (this is mostly how I use script/runner). -Brian
On Monday, May 29, 2006, at 11:11 AM, Brian Hughes wrote:>On May 29, 2006, at 09:44 AM, Richard Williams wrote: >> I''ve read the wiki and Agile and can''t find the answer. >> >> When using script/runner I''ve gotten simple model functions similar to >> the -help example to run: >> >> $script/runner ''puts Vendor.find(1).name3'' >> >> where Vendor is a model. >> >> However when I try to run a function in a controller it doesn''t work: >> >> $script/runner ''puts ApplicationHelper.money(100)'' >> script/runner:29: undefined method `money'' for > ApplicationHelper:Module >> (NoMethodError) >> >> I''m sure there is a simple solution to this. > >You''ve actually got two separate problems here: > >First, you say that you want to use script/runner to execute a >Controller method. But Controller methods are executed in the >context of an HTTP request, which script/runner doesn''t know how to >set-up. However, you could easily create a class, say inside the lib >folder, with a method that mimicked what your Controller action >does, without needing the HTTP request environment. Then you would >be able to call that method from script/runner. Also, make sure you >prepend "self." onto the name of the method, since you won''t first >be instantiating an object of that class before you try to call the method. > >Second, Helper methods aren''t actually part of your Controllers. >They are modules that get mixed in to the View rendering step, so >that your view templates can call them. Until they are included, >their methods really aren''t accessible, since they were never >designed to be called from outside the including View''s context. > >> More generally, does script/runner look in every class in the >> application to try and find the referenced class? > >When you execute script/runner from the command line you are >actually launching an instance of your Rails app. The first thing >that ruby does is load all of your application''s code into memory, >which then makes all of your classes, and their methods, available >for you to reference. However, that doesn''t mean that you can call >all of them from a command line context. As I''ve explained above, >some methods need to be invoked in certain ways in order for them to >function properly. > >The script/runner program gives you a way to access the business >logic (this is the code that you add to your Model classes) from >outside the web/http context that they are normally accessed >through. It''s one of the best ways to run periodic routines that >need to check the data of your app (eg. expiring ActiveRecord >session table objects, based on their last modified time), as well >as a great way to batch run certain processes, like data imports and >exports (this is mostly how I use script/runner). > >-Brian > >_______________________________________________ >Rails mailing list >Rails@lists.rubyonrails.org >http://lists.rubyonrails.org/mailman/listinfo/railsThank you for the clear explanation. Richard -- Posted with http://DevLists.com. Sign up and save your mailbox.