hi all,
can someone tell me why I need to get the data from a form like the code
below
even when I dont want to create a NEW user?? I am confused
@user = User.new(params[:user])
username = @user.username
user = User.find(:first, :conditions => ["username = ?",
username])
why I cant simply get the form data with
username = params[:username]
and why needs User.find an ID - also when I say "conditions =>
["username = ?", username])
what I am doing wrong?
thanks
andreas
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params[:user] isnt the username, its a hash which contains all form parameters like username and all the other stuff from the form try this: username = params[:user][:username] --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
You >don''t< have to do it that way. The params[:user] variable in your controller is a hash of the form data. Use this: username = params[:user][''username''] As for what you are trying to do, it is much easier than what you are trying. Rails creates dynamic finders for your models, so if you have a field "username" there is a finder defined as "find_by_username". You can use that with the params value to get your user object in one line: user = User.find_by_username(params[:user][''username'']) Enjoy. c. Andreas Schneider wrote:> hi all, > > can someone tell me why I need to get the data from a form like the code > below > even when I dont want to create a NEW user?? I am confused > > @user = User.new(params[:user]) > username = @user.username > user = User.find(:first, :conditions => ["username = ?", username]) > > > why I cant simply get the form data with > username = params[:username] > > > and why needs User.find an ID - also when I say "conditions => > ["username = ?", username]) > > what I am doing wrong? > thanks > andreas-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Incidentally, "find_by" uses the :first functionality - it returns the
first matching row. If you want are looking for more than one row from
the database (:all functionality), the dynamic finder is
"find_all_by_<field>", like this for instance:
users = User.find_all_by_state(''FL'')
...will find all users with a "state" value of "FL" on the
database.
c.
Cayce Balara wrote:> You >don''t< have to do it that way. The params[:user]
variable in your
> controller is a hash of the form data. Use this:
>
> username = params[:user][''username'']
>
>
> As for what you are trying to do, it is much easier than what you are
> trying. Rails creates dynamic finders for your models, so if you have a
> field "username" there is a finder defined as
"find_by_username". You
> can use that with the params value to get your user object in one line:
>
> user =
User.find_by_username(params[:user][''username''])
>
> Enjoy.
> c.
>
>
> Andreas Schneider wrote:
>> hi all,
>>
>> can someone tell me why I need to get the data from a form like the
code
>> below
>> even when I dont want to create a NEW user?? I am confused
>>
>> @user = User.new(params[:user])
>> username = @user.username
>> user = User.find(:first, :conditions => ["username =
?", username])
>>
>>
>> why I cant simply get the form data with
>> username = params[:username]
>>
>>
>> and why needs User.find an ID - also when I say "conditions =>
>> ["username = ?", username])
>>
>> what I am doing wrong?
>> thanks
>> andreas
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thanks Cayce! wooow...thats great - when you come from the MS ASP world - like me - you never think about that there are such commands like find_by_username ... I am impressed - really! I think I have the most problems - because I think in a total different way - also when you are regulary type in SQL sequences into asp code to get back data from an sql server - its really different to me to work in this "new" way. I feel like a kid, doing the first steps in coding. I am happy that I know a bit about c and c++ - but dont get the classes in RoR. Where do I need to define the classes to access then from everywhere. E.g. I want to create a SendEmail class - where do I need to define this class to send emails from every controller? These is only one question from many in my head. what I also miss is a documentation which shows e.g. all ways to search in a database. find, find_all, find_by_... anyway- -thanks! andreas -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
As for documentation, what you can get for free on the web is generally of the reference-style, meaning that you kind of have to know what you''re after to go find things. For instance, http://api.rubyonrails.org will give you the nitty-gritty of every class, method, etc in the system. But, if you don''t know what to look for, you''re prolly out of luck. For more tutorial/"teach me" style documentation, the Pragmatic Programmers books are excellent: Agile Web Development With Rails (commonly referred to as AWDWR) http://www.pragmaticprogrammer.com/titles/rails1/index.html Rails Recipes http://www.pragmaticprogrammer.com/titles/fr_rr/index.html Another excellent resource, specific to using AJAX in Rails: http://www.oreilly.com/catalog/rjsrails/ You''re looking at about $50 for these, in my mind they''re worth many, many multiples of that. If you get the PDF''s you''ll have them almost immediately, and you get free updates. As for email - there is no need to write your own class. ActionMailer is part of Rails and will do just about anything you need it to, re: email. See: http://wiki.rubyonrails.org/rails/pages/ActionMailer for beginning details. With regards to "getting" the classes in rails, that''s a combination of both Ruby and Ruby on Rails. If you want to deep-dive the Ruby language itself, then the Programming Ruby book is what you want: http://www.pragmaticprogrammer.com/titles/ruby/index.html But that might be overkill - coming from ASP world. There is an appendix in AWDWR that will intro you to Ruby. c. Andreas Schneider wrote:> thanks Cayce! > > wooow...thats great - when you come from the MS ASP world - like me - > you never think about that there are such commands like find_by_username > ... I am impressed - really! > > I think I have the most problems - because I think in a total different > way - also when you are regulary type in SQL sequences into asp code to > get back data from an sql server - its really different to me to work in > this "new" way. I feel like a kid, doing the first steps in coding. I am > happy that I know a bit about c and c++ - but dont get the classes in > RoR. Where do I need to define the classes to access then from > everywhere. E.g. I want to create a SendEmail class - where do I need to > define this class to send emails from every controller? These is only > one question from many in my head. > > what I also miss is a documentation which shows e.g. all ways to search > in a database. find, find_all, find_by_... > > anyway- -thanks! > andreas-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
thanks for all the hints cayce! andreas -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---