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    What is the difference between a belongs_to and a has_one? Reading the Ruby on Rails guide hasn't helped me. See Question&Answers more detail:os...
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    How do I add a default value to a column that already exists through a migration? All the documentation I can find ... but in this case it does. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a form select statement, like this: = f.select :country_id, @countries.map{ |c| [c.name, c.id] } ... ="YYY">Argentina</option> ... See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I've missed the memo somewhere, and I hope you'll explain this to me. Why is the eigenclass of an ... sneaky trick of Ruby meta-programming? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    In general, what are the advantages and disadvantages of using an OpenStruct as compared to a Struct? What type of ... would fit each of these? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    If I download a .gem file to a folder in my computer, can I install it later using gem install? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Sometimes, Activerecord data types confuse me. Err, often. One of my eternal questions is, for a given case, Should ... know which type to use? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm building a group calendar application that needs to support recurring events, but all the solutions I've come up ... that's good to know.) See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am running Ruby on Rails 3.0.10 and Ruby 1.9.2. I am using the following Regex in order to match names: NAME_REGEX = / ... è, é, ì, ò, ù, ...? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm using Mechanize to facilitate the downloading of some files. At the moment my script uses the following ... Mechanize's cookies with it? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have the same rails app in OSX and Ubuntu, I want to use Zeus to speed up my rspec. In Ubuntu, Zeus ... a default gem What should I do? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am having problems uploading multiple files using paper clip, my models are as such slider has_many ... Cancel', slider_index_path %> See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Throughout my application self. is not necessary to refer to a User's name. name works fine. Why does the following ... is given. Rails 3.0.7. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    What's the best way to delete duplicate records in a mysql database using rails or mysql queries? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm quite new to rails, and trying to follow the railstutorial. Everything goes fine, except for my tests which can' ... and didn't find any ^^' See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    When I use <%= f.datetime_select :somedate %> in a form, it generates HTML like: <select id="some_date_1i" ... a solution to that other problem. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    puts "hi" puts "bye" I want to store the STDOUT of the code so far (in this case hi bye into a variable ... " line should give me hi and bye. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have been getting all kinds of conflicting information regarding this basic question, and the answer is pretty ... city f.submit "Submit" See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Before writing this question I looked at these answers, but was unable to find a solution.: Error when execute ... be grateful for any help! See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I just created a counter_cache field and the controller looks like this. @users = User.where(:sex => 2) ... , :counter_cache => :received_likes See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Using select_date gives me back a params[:my_date] with year, month and day attributes. How do get a Date ... use date_select instead as well. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am suddenly getting this error in development and in production on deployment. custom.css.scss ... 20141001060418/vendor/assets/stylesheets See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I tried installing the gem 'sinatra-websocket', but when I ran gem install sinatra-websocket, I got this error... ... .", but is that relevant? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm trying to write LIKE query. I read that pure string quires aren't safe, however I couldn't find ... I manually defend against SQL Injection? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Suppose we have a list of items with an integer: USA: 3 people Australia: 2 people Germany: 2 people If we ... How would you solve this problem? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I've got a photo upload feature in my rails app. The app uploads direct to s3 through carrierwave via rmagick ... for setting up my s3 upload. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    My java web application is running on tomcat at http://localhost:8080/ Writing my first spec, home_spec: ... : require 'capybara/rspec' See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    This tag with rails 3 <%= link_to 'Destroy', item, :method => :delete,:confirm=>'Are you sure?' %> ... twice. What could be causing this? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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