What Ruby and Rails Developers Ought To Know?
What should know the Entry Level, Mid-level, Senior Developer? Theoretical knowledge, development tools, gems and more. What issues are usually at the interview? ...
ruby-on-rails
HELP!! Delayed-job: Rake aborted! Can't modify frozen hash
Too bad even the trace doesn't say which hash is involved. Sorry this post is long: am trying to provide enough context to be meaningful. Occurs intermittently when rake jobs:work is pulling a command out of delayed_jobs while my status observer is in the process of parsing a log file for detailed results of the previous delayed_job de...
Upload a Photo to Facebook with REST API and Ruby
It's much harder than you'd think: http://wiki.developers.facebook.com/index.php/Photos.upload The tricky part is how to create the MIME multi-part message in Rails, which Facebook requires. I'm also using a Ruby Facebook API gem (mini_fb) which signs my other requests, and in addition to having no idea how to set up the MIME multi-par...
Problems with rails and saving to the database.
I've been having some difficulty in understanding the source of a problem. Below is a listing of the model classes. Essentially the goal is to have the ability to add sentences to the end of the story, or to add stories to an existing sentence_block. Right now, I'm only attempting to allow users to add sentences, and automatically create...
Prime Number - Data while loading
Hi, I was trying in Ruby on Rails how to find a prime number. Here is my code : helper : app/helpers/test_helper.rb module TestHelper def prime_number? number index = 2 tmp = 0 while index <= number if tmp < 1 if (numbe...
Can't get access to PHPmyAdmin after setting a root password and using Instant Rails
Wanted to get started with Ruby on Rails so I installed instant rails and set up a mysql password. Problem is now I can't get access to phpmyadmin. From the rails control panel, when I go to configure >> database (via PhpMyadmin) it opens up phpmyadmin with the message Error MySQL said: Documentation #1045 - Access denied for user 'r...
Building an extension framework for a Rails app
I'm starting research on what I'd need in order to build a user-level plugin system (like Wordpress plugins) for a Rails app, so I'd appreciate some general pointers/advice. By user-level plugin I mean a package a user can extract into a folder and have it show up on an admin interface, allowing them to add some extra configuration and t...
Loading a page into memory in Rails
My rails app produces XML when I load /reports/generate_report. On a separate page, I want to read this XML into a variable and save it to the database. How can I do this? Can I somehow stream the response from the /reports/generate_report.xml URI into a variable? Or is there a better way to do it since the XML is produced by the sa...
Google Maps integration with JSON - CircularReferenceError
Update II I Figured this out. When using google maps api, the model must not be named "maps". to_json works after I created a new model name. Update @maps is the name of my model, it contains information such as address, longitude, latitude. When I replace <%= @maps.to_json %>; to <%= @maps %>, the HTML renders ActiveRecord::Relation...
Is there anyway to make a Rails / Rack application tell the web server to drop the connection
There are many security reasons why one would want to drop an HTTP connection with no response (eg. OWASP's SSL best practices). When these can be detected at the server level then it's no big deal. However, what if you can only detect this condition at the application level? Does Rails, or more generally Rack, have any standard way o...
In Mechanize what is the cookiejar and how does it differ from cookies?
How does Mechanize::CookieJar differ from the Mechanize::Cookies array? There must be some difference but after poking around for a little bit I can't seem to find a good explanation? ...
How do I prevent capistrano from overwriting files uploaded by users in their own folders?
I'm using Capistrano and git to deploy a RoR app. I have a folder under which each user has their own folder. When a user uploads or saves a file, it is saved in their own folder. When I deploy new versions of the code to the server, the user files and folders are overwritten with what's on my dev machine. Is there a way to ignore som...
Return only the new database items since last check in Rails
I'm fairly new to Ruby, and currently trying to implement an AJAX style commenting system. When the user views a topic, all the current comments on that topic will be displayed. The user can post a comment on the page of a topic and it should automatically display without having to refresh the page, along with any new comments that hav...
Jquery, AJAX and URL changes...
Jquery, AJAX and URL changes... I have a gallery, and when the image change i would like to change my url to "#image_id=321" and when i load an url with this appended: "#image_id=321", loads the image with id 321. is this possible to make without the "#" and using "/photo-id/321"? thanks ...
Rails: How to to download a file from a http and save it into database
Hi, i would like to create a Rails controller that download a serie of jpg files from the web and directly write them into database as binary (I am not trying to do an upload form) Any clue on the way to do that ? Thank you Edit : Here is some code I already wrote using attachment-fu gem : http = Net::HTTP.new('awebsite', 443) http...
Rails more statements with ; doesnt work... :s
I have this code, but i cant make it work: images = Image.find_by_sql('PREPARE stmt FROM \' SELECT * FROM images AS i WHERE i.on_id = 1 AND i.on_type = "profile" ORDER BY i.updated_at LIMIT ?, 6\'; SET @lower_limit := ((5 DIV 6) * 6); EXECUTE stmt USING @lower_limit;') I got this error: Mysql::Error: You have an error in your SQL sy...
Help debugging Apache, Passenger and Rails problem
We have an environment running that uses Apache, Passenger and rails. The system is handling most request normally, yet certain requests do not make it to the rails application. For instance, a request to /books is successful, but /books/1 hits apache and passenger, but does not even make it to rails. We set the apache log level to de...
Override to_json in Rails 2.3.5
Update: This issue was not properly explored. The real issue lies within render :json. The first code paste in the original question will yield the expected result. However, there is still a caveat. See this example: render :json => current_user is NOT the same as render :json => current_user.to_json That is, render :json will no...
implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly. (ActionView::TemplateError)
Most of you should already know Pragmatic book's "Agile web dev with rails" (third edition). On page 537 - 541 it has "Custom Form Builders" code as follows: class TaggedBuilder < ActionView::Helpers::FormBuilder # <p> # <label for="product_description">Description</label><br/> # <%= form.text_area 'description' %> #</p> def s...
How to build a JSON response made up of multiple models in Rails
First, the desired result I have User and Item models. I'd like to build a JSON response that looks like this: { "user": {"username":"Bob!","foo":"whatever","bar":"hello!"}, "items": [ {"id":1, "name":"one", "zim":"planet", "gir":"earth"}, {"id":2, "name":"two", "zim":"planet", "gir":"mars"} ] } However, my User an...