search for: your_model

how to set default value in combo box or whether there is another way plz explain with example code advance thx have a nice day -- Posted via http://www.ruby-forum.com/.

Hey all, I have a many-to-many relationship (Questions has_and_belongs_to_many Answers), and when I destroy the Question (the one) I also destroy all the Answers (the many). Since the following doesn''t seem to work for has_and_belongs_to_many: class Question < AR::Base... has_and_belongs_to_many :answers, :dependent => :destroy end I have this embedded in a transaction block

How do I specify which option should be initially selected when using the collection_select command? I''ve tried: collection_select(:selectionfilter, :producer_id, Producer.find(:all), :id, :name, {:include_blank => true, :selected_value => @initial_selection}) However it doesn''t return the desired results (the option with the value of @initial_selection selected).

I am wondering why is in creating text fields with form_helper used value_before_type_cast instead of attribute value for field value? I set rails enviroment so date fields are in european format (dd.mm.yyyy) and would like to have same format in forms, but because of value_before_type_cast is called, form fields are filled with ''yyyy-mm-dd'' or timestamp integer, etc.

...slate the Stata commands. Not everybody is fluent in those. It would even help more if you would enlight us about the function you used to fit the model. Getting the marginal effects is not that hard at all, but how depends a bit on the function you used to estimate the model. You can try predict(your_model,type="terms",terms="the_term_you're_interested_in") For exact information, look at the respective predict function, eg if you use lme, do ?predict.lme Be aware of the fact that R normally choses the correct predict function without you having to specify it. predict() works...

hello i want to ask, how to generate model from table in my database. That''s possibel ? -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send

Hello people, I''d like to detect whether an attribute of a model has vaildates_presence_of applied to it so I can automatically apply a mandatory (*) to the field...it doesn''t look easy...any ideas? Cheers, -- Dan Webb http://www.danwebb.net

Hi I''m using this method to send emails def send_report(name, email, content) recipients email subject "My subject" from "no-reply-UG3EKd521ZA@public.gmane.org" body :content => content content_type "text/html" end I''d like to know if the email has been sent or not

Dear all, I need to use R for one estimation, and i have readily available stata command, but i need also the R version of the same command. the estimation in stata is as following: 1. Compute mean values of relevant variables . sum inno lnE lnM Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------

dear R experts---I am using the coef() function to pick off the coefficients from an lm() object. alas, I also need the standard errors and I need them fast. I know I can do a "summary()" on the object and pick them off this way, but this computes other stuff I do not need. Or, I can compute (X' X)^(-1) s^2 myself. Has someone written a fast se() function? incidentally, I think

.... It would even help more if you would enlight us about the > > function you used to fit the model. Getting the marginal effects is > > not that hard at all, but how depends a bit on the function you used > > to estimate the model. > > > > You can try > > predict(your_model,type="terms",terms="the_term_you're_interested_in") > > > > For exact information, look at the respective predict function, eg if > > you use lme, do ?predict.lme > > Be aware of the fact that R normally choses the correct predict > > function w...