similar to: STI with_scope on parent - bug or feature?

Hello, If you want to loop through the columns of a data.frame you can do for(i in names(df)){ [code] } Another way would be lapply(names(df), function(somecol) class(df[[somecol]])) where class(df[[somecol]]) is just an example, you would use whatever fits your needs. When you say that the column in question holds "levels" do you mean it's a factor? (factors are R's

Matti - Since you are asking about looping through a column, not looping across columns, it is simply the following: # Note: data.frame() turns strings into factors by default. myDF <- data.frame(type = c("a", "j", "a", "a", "j"), weight = c(12.3, 6.8, 10.5, NA, "5.5")) myDF$type # ... is a vector of factors

Boris: "As others have remarked, for added efficiency with large datasets we often use functions from the apply() family, rather than for-loops." That is generally false, though it is a common misconception. Apply-type functions are used to maintain fidelity -- and for some, clarity -- to a functional programming paradigm. Cheers, Bert Bert Gunter "The trouble with having an

It?s sometimes faster to ask from someone who has already learnt the syntax. In this case one has to do e.g. names(data$somecol) To get the collection and then iteration through it is almost like in Python: for(i in names(data$somecol)) { # do something } > Bert Gunter <bgunter.4567 at gmail.com> kirjoitti 6.11.2017 kello 19.55: > > Time to go through a tutorial or two! --

So, I hear that with_scope is going to be deprecated. Which is a bit of a shame, given the stuff I''ve been writing recently. I have a CMS with multiple clients. A ''client'' is essentially a company, with multiple users. Content on the site belongs to a client - content could be messages, images, schedules, etc etc. People belonging to one client should not be able

i got two controller (with restful actions) where my code is quite ugly and not very dry. every action looks quite like this: if @logged_user.has_role?("admin") User.find(params[:id) else @logged_user.group.user.find(params[:id]) this is a security check that enforce a simple spec: normal user should read/write information only about their group''s users, but

(I''ve had this patch lying around for a couple of weeks, waiting for Trac to come back up. noradio''s already had a look at it on IRC. What''s the best way to submit patches while Trac is down?) with_scope doesn''t support :order in the presence of :include. For example: {{{ # We''re testing the interaction between :order, :include, and

Hi there, I have something like the following: class Person < AR:B ... ... has_many :votes has_many :chosen_answers, :through => :votes, :source => :answer, :select => ''DISTINCT answers.*'' do def my_answers(whodunnit) chosen_answers.with_scope(:find => { :conditions => [ "votes.created_by=?", whodunnit ] }) do chosen_answers.find :all

>From what i can gather the with_scope feature doesn''t allow you to specify which columns get selected. It appears to default to "*". So if i specify something like: Question.with_scope( :find => { :from => "questions q, answers a", :conditions => "q.owner = a.owner AND a.owner=1" }) do ... end I''ll generate SQL like: SELECT *

Has anyone successfully gotten the scoped_access[1] plugin to work in Rails 1.1? Some of the methods it was relying on are now no longer accessible. It seems the only way to add scope is to use the ''with_scope'' method that takes a block, but since Rails doesn''t have real around filters[2] I cannot see a way of adding a scope using a filter. Anyone using with_scope

There are areas of my application that "want" to use a url structure like domain/<human_readable_param>/<Module>/<Controller>/<Action>/<Id> Please note that the human readable parameter I need to inject is NOT related to the <id> being used by the action/controller pair. It''s identifying a container object whose contains are operated

I have the following code: class User < ActiveRecord::Base has_many :requests do def find_active(options = {}) with_scope :find => { :conditions => ["requests.active = ?", true] } do find(:all, options) end end end end Executing user.requests.find_active results in the following SQL: SELECT * FROM requests WHERE (( requests.user_id = 10 ) AND (

Why does with_scope work with .create, .find, but not with .new? It breaks all scaffolded code :( -- Posted via http://www.ruby-forum.com/.

Hi all ! Is this supposed to work ? class Email < ActiveRecord::Base has_many :to, :class_name => 'Recipient', :conditions => "recipients.source = 'to'" do def create!(*args) with_scope(:create => {:source => 'to'}) do super end end def build(*args) with_scope(:create => {:source => 'to'}) do

If with_scope has been called previously, how do I access the find conditions dynamically? I am asking because I am using a find_by_sql call (which clobbers the with_scope). How can I access the method scoping so that I can read it and incorporate it into my query manually? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google

Hello, I just finished writing a plugin for Rails that I''m annoucing the first release here: meantime_filter. It is descibed at http://roman2k.free.fr/rails/meantime_filter/0.1.0/ rdoc/ (See the end of this message for getting it.) ABOUT THE PLUGIN It extends ActionController to add the functionnality of having filters run at the action call time. This new type of filter yields

Time to go through a tutorial or two! -- This forum cannot replace such self study. Your query evidences some basic confusion, but ?tapply or the equivalent lapply(split(...)) construct are most likely relevant. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his

I have an input field with an id which has a value. The web_steps.rb method does not find the value. Is this the right step to use to check an input field? It works fine for a text_area but not an input. Scenario steps (tried both ways): Then the "travel_card_number_gate" field should contain "5" Then the "#travel_card_number_gate" field should contain "5"

After reading a data.frame using, such as a <- read.spss("data.sav") I want to give the column index 'i', or a[i] to a function, which after some calculation, should print out the results to the standard output. I am struggling how to access the data itself, as e.g. sum(a[i]) does not work in this context. In addition I need to know the name of the variable within the

Hi all, I want to limit access to model objects based on the role of the logged in user. It seemed the most blunt way of doing this would be make copies of each controller which accessed the models and use one of the access control systems out there to limit access to the controllers. However, with 9 different controllers this seems like a terrible choice. Here''s what I''ve