similar to: redirect_to(:action => ...) usage?

Agile Web Development with Rails doesn''t seem to have NULL in the index [or my eyes have failed me again], and web searching turns up lots of SQL statements containing NOT NULL. I have a table of loans, and I want to record when something was loaned and returned. The loan date can''t be null, or there''d be no entry in the table. The return date must be something

I create my rails app, with modifications to the default from a script. Having had to upgrade rails once, and knowing that this is likely to happen again because of the rapid updating of rails, it seems the most sensible way to do it. As a result, I often do /bin/rm -rf csestore and then run my script from another window to repopulate it. So naturally, to save having to cd into csestore, and

What is the rails idiom for submit buttons on forms? All other field types have helpers, but button_to creates its own form, so should not be used. I''ve looked in "Agile Web Dev. with Rails" but can''t see what I should do instead. Is this "difficult" because it runs counter to AJAX type forms? And, related, is there a way to ensure that hitting return in

my models borrower ----- has_many :loans loan ----- belongs_to :borrower my loans _controller def new @borrower = Borrower.find(params[:borrower_id]) logger.debug '' @borrower.id'' logger.debug @borrower.id @loan = Loan.new respond_to do |format| format.html # new.html.erb format.xml { render :xml => @loan } end

With code like: if @params[:pnumber] =~ /\s*p?(\d+)\s*/ if student = Student.find_first(:conditions => ["pnumber like \":pnumber%\"", {:pnumber => $1}]) @borrower = student elsif emp = Employee.find_first(:condiwions => ["pnumber like \"?\"", {:pnumber => $1}]) @borrower = emp else

I''m not sure why this is happening, but if I do this in a controller unless @variation && @variation.quantity > 0 flash[:error] = "Sorry, that product is currently not available." redirect_to(:action => ''error'') and return end rspec tells me 2) ActionController::DoubleRenderError in ''The Carts controller with an

Hi, I have a situation where I could link_to a shared action in my controller through 2 separate use cases. In both cases, I''d like the action to execute and then render the same exact page from where it was called. In other words, just execute the action and then not do anything, maybe just refresh the current page from where I called the shared action. If I do have to specify an

Native ERB in ruby, and eruby, seem to lack the -%> feature for suppressing trailing newlines. Thus erb -n script gives errors. Where is Rails ERB so I can invoke it directly? Thank you Hugh

I''m resending this with additional information, as I''ve had no response. I''ve been trying to use the fixture_references plugin, and I seem to be getting lots of: 1) Error: test_truth(DeviceTest): ActiveRecord::StatementInvalid: Mysql::Error: #HY000Field ''description_id'' doesn ''t have a default value: INSERT INTO devices (`id`) VALUES (2)

So I would like to be able to update a record without having to load the edit page. Lets use checking out a book as an example. From the front page of my application I would like to be able to have a form field where I can enter a record id and select one of a couple of check boxes and then hit submit which will update the associated record with the action selected by the check box (check out,

For the initial data step, assuming a data frame named stress already exists, and using base R, you can start with something like this: barcodes.to.delete <- c('16187DD4015', '16187DD6002', {complete the comma-delimited vector of barcodes you don't want} ) yield <- subset(stress, !(barcode %in% barcodes.to.delete) ) yield <- subset(yield , !(field %in%

You might get better answers if you 1 - break this down into separate issues 2 - tell us what you want to achieve in words rather than SAS, we all read English but few of us speak SAS 3 - post in plain text not HTML as HTML mangles your post On 29/09/2017 13:47, Andrew Harmon wrote: > Hello all, > > My statistical analysis training up until this point has been entirely done > in

Hello all, My statistical analysis training up until this point has been entirely done in SAS. The code I frequently used was: *Yield Champagin; data yield; set stress; if field='YV' then delete; if field='HB' then delete; if barcode='16187DD4015' then delete; if barcode='16187DD6002' then delete; if barcode='16187DD2007' then delete; if

Hello Rubyists, I need to generate barcodes (in UPC and codabar symbologies) and would like to know if anyone has done this with Ruby. From what I can tell, it would be possible to use the gnu-barcode [1] or barcodewriter [2] to generate a PostScript, then through RMagick (via GhostScript) take the file and create a GIF/JPG. These will really only be used for web display (to be printed

********UNDEFINED METHOD REGISTER ERROR IN THE FALLOWING CODE ******* Hi all, I am trying to generate barcode(including its name as label at the bottom of barcode image for easy understand with out scanning by barcode scanner). For this I am Using barby, chuncky_png, rmagick gems. I am using the fallowing code to generate label at bottom of image by using rmagick gem: gem

I''m trying to stub(!) the Kernel.` (backquote) method and I''m having confusing (to me) results. Here''s the method I''m spec''ing: class Barcode ... def raw_barcodes self.make_temporary_copy `OcrBarcode #{self.temp_file_path}` end ... end And this is my (newbish) attempt at the spec: describe "Calling @barcode.raw_barcodes" do

I wish to second this approach to learning R. I tried for several years to translate other stat programs or provide parallel analyses with R. This dabbling-in-R approach did not work . When a transferred to a research unit that could ill afford commercial software, I devoted my entire time to doing everything in R. This was a difficult learning process, but I eventually became proficient

I will offer an opinion, with which others may fairly take issue. If you are coming from SAS and wish to learn R, you should forget about SAS entirely; it is ancient and convoluted. But more to the point, as others have already suggested, you will only confuse and hamstring yourself trying to convert the programming paradigms of one language into another. Better to consider the **tasks** you wish

Regarding point 3, as a moderator I have been helping Andrew get this post out to the list over the past week. His previous attempts were encoded in some way that the listserv rejected. He sent me the post via his gmail account and viewing the source I saw it had at least both plain test and HTML an I said it was worth a try to post it. Certainly on my mail client his post displays acceptably

On 13 September 2017 at 11:42, Johnny Hughes <johnny at centos.org> wrote: > On 09/13/2017 10:28 AM, hw wrote: >> >> Hi, >> >> https://ctan.org/tex-archive/graphics/pstricks/contrib/pst-barcode/ >> says that pst-barcode is included in texlive. >> >> I installed texlive, and it can?t find pst-barcode.sty. Is that a >> bug in the packaging