similar to: [RoR],[C.L.R] How I convert a string object into a class?

I have A Definition model, is it possible to do something like this in Rails 2.1.0, Ruby 1.8.6 : foo = "Definition" @definition = foo.to_class.find(:all) -- 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,

Somewhere between 0.13.1 and the current SVN version the :overwrite_params option to url_for (and related methods) went missing. I can''t tell whether this was deliberate or by mistake, and I have no idea how to get the same functionality in some other way either. Michael -- Michael Schuerig Life is what happens

I know there''s wiki page on generating PDF[*], but that''s not really what I want. I don''t need to create arbitrary PDF. What I''d like to do is create PDF templates and fill in the blanks. Roughly, I''m looking for functionality akin to the mail merge feature of word processors, including conditional and repeated elements, say, table rows. Michael

I have a model layer containing Movie, Person, Role, and RoleType, making it possible to express facts such as "Clint Easterbunny is director of the movie Gran Milano". The relevant model and associations look like this class Movie < ActiveRecord::Base has_many :roles, :include => :role_type, :dependent => :destroy has_many :participants, :through => :roles, :source

Hey everyone, I''m interested in extending ActiveRecord::Base. I have a special "easier" find function that I want to include in all classes. How can I include this in all classes? Can I just create a model object that does something like this: class ExtendedAR < ActiveRecord::Base def self.special_find ... end end and then all my other classes

Hi! Say we have a rails active-record-based model called "instance" which can have different states - STOPPED, RUNNING, STARTING_UP, SHUTTING_DOWN, etc... There is a method #start which changes the instance state to STARTING_UP only if it is STOPPED. def start if self.state == STOPPED self.state = STARTING_UP self.save ... end end As you understand if we have multiple

has anyone has any idea how to implement audit trail table for all update / deletion done on records? I''m thinking to have corresponding audit trail table to each table, so everthing before an update or deletion is done, a new record will be insert into the corresponding audit trail table. Is there a way to overwrite the save, destroy, method at the application level? so that I do not

Some of my earlier questions may have hinted ever so slightly in the direction that I''m trying to implement "enumerations". By an enumeration here I mean a class that has a fixed number of immutable instances, which in turn have essentially only a name and a position. Requirements I''ve tried to meet are - Enumeration instances should only be loaded once from the

This is OT but have not been able to get a response elsewhere (stack overflow and the project site itself) so thought someone here might know or have some ideas. First, I am using wkhtmltopdf stand alone without any of the rails gems as I found that for some reason using WickedPdf or PdfKit my pdf''s did not generate with active links from the links from those in the html. When I run

I have several tables for enumerations. They all have the same content: id, name, position. I''d like to avoid the tedious work of defining a class for each one explicitly. Not least, in order to avoid clutter in the model directory. Here''s what I''ve come up with: class EnumRecord < ActiveRecord::Base def self.define_enums(*enums) enums.each do |spec|

I''m in a dilemma: In order to keep GET requests from deleting objects, I''d like to use the button_to helper to get "something" that generates a POST request. Unfortunately, that something is a form and forms can''t be nested. I''d also like to place buttons related to the same form close to each other. At the top are some navigational buttons

When a validates_asssociated fails... I get something like Address is invalid is there a way, preferably on a per-association basis to have the error messaage include the actual error like Zipcode is too long (max is 10 characters) _______________________________________________ Rails mailing list Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org

Hi, I found it a while ago, an add-on to Rails for supporting movable select boxes, but I searched through the wiki and the mailing list and couldnt find what I was looking for. I was hoping someone might know of or remember something about the project. Thanks, Dylan.

There really doesn''t seem to be a *declarative* way to define a default value for belongs_to and has_one associations class Person < ActiveRecord::Base belongs_to :address end p = Person.new p.address.city = ''Atlantis'' # Bummer! Of course, there''s an easy way to avoid this class Person < ActiveRecord::Base belongs_to :address

I have an ADD form with foreign key field values selectable via select list ( collection_select (...)). When I add validates_presence_of :someotherfield to my model for error trapping, I get the following error for each droplist: NoMethodError in Reviews#create_curriculum Showing /reviews/_form.rhtml where line #16 raised: undefined method `inject'' for nil:NilClass Extracted source

I''d like to run the FastCGI as a different user than the Apache2 server (www-data on Debian). I take it this is possible in some way with suExec2, but so far I haven''t figured out how to do it. Michael -- Michael Schuerig Life is just as deadly mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org As it looks

I''ve inherited an EAV database and there''s really no option to remodel it. Data is stored as key_name, key_value pairs Trying to return a meaningful, unified recordset is far too complex to be efficient. I''ve decided to make use of the MySQL GROUP_CONCAT, and CONCAT_WS functions to return a fast query result, with the consolidated fields as one string. The final data is

Hello everyone, It seems that the answer to my question should be obvious, but I''ve not yet found a way to do what I want. Any advice on the best method would be greatly appreciated. Have the following database table: CREATE TABLE datasets ( id int not null auto increment, name varchar not null, value varchar not null, year varchar not null, state

Here''s a simplistic model class. class Person < ActiveRecord::Base has_and_belongs_to_many :relatives, :class_name => ''Person'', :join_table => ''relatives'', :foreign_key => ''from_id'', :association_foreign_key => ''to_id'' has_and_belongs_to_many :brothers, :class_name =>

Hi everyone, I''m building an app in RoR that apart from the normal web interface has a web service. This web service takes a parameter and uses that in a single database query, and returns the result in a simple XML format. This web service needs to be quite fast as it will be used on all pages of a quite big site with thousands of visitors every hour. I don''t think caching is