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  • Rails setting OR conditions in validate_presence_of in a model?

    - by Jty.tan
    In a rails model, is it possible to do something like class Example < ActiveRecord::Base #associations validates_presence_of :item_id, (:user_id OR :user_email) #functions end Where the model has 3 columns of :item_id, :user_id, and :user_email? I want the model to be valid as long as I have a :user_id or a :user_email. Idea being that if the item is recommended to a person who isn't currently signed up, it can be associated via email address for when the recommended person signs up. Or is there a different method that I can use instead?

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  • Is Amazon SQS the right choice here? Rails performance issue.

    - by ole_berlin
    I'm close to releasing a rails app with the common networking features (messaging, wall, etc.). I want to use some kind of background processing (most likely Bj) for off-loading tasks from the request/response cycle. This would happen when users invite friends via email to join and for email notifications. I'm not sure if I should just drop these invites and notifications in my Database, using a model and then just process it with a worker process every x minutes or if I should go for Amazon SQS, storing the messages and invites there and let my worker retrieve it from Amazon SQS for processing (sending the invites / notifications). The Amazon approach would get load off my Database but I guess it is slower to retrieve messages from there. What do you think?

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  • Rails/SQl query help: Find all created Categories past 7 days per each day?

    - by Senthil
    I'm unable to get SQL and Rails to play properly when trying to find Categories that are created each day, the past 7 days. So basically I want to find each Category sorted by the day they were created for the past 7 days. I found this on stackoverflow, but it isn't finding a Category that I just created: Category.all(:conditions => ["created_at > ? AND created_at < ?", t.at_beginning_of_day, t.tomorrow.at_beginning_of_day]) Any help?

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  • Does it make sense to use BOTH mongodb and mysql in the same rails application?

    - by Brian Armstrong
    I have a good reason to use mongodb for part of my app. But people generally describe it as not a good fit for "transactional" applications like a bank where transactions have to be exact/consistent, etc. Does it make sense to split the models up in Rails and have some of them use MySql and others mongo? Or will this generally cause more problems than it's worth? I'm not building a banking app or anything, but was thinking it might make sense for my users table or or transactions table (recording revenue) to do that part in MySql.

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  • What would you use for auto completion in Rails app?

    - by Andrei
    I want to use auto-completion in a number of fields (5-7) in my forms. There is a screencast on auto-completion with Prototype library by Ryan Bates ( http://railscasts.com/episodes/102-auto-complete-association). On the other hand, I have noticed that quite many guys suggest jQuery for this task ( http://jquery.bassistance.de/autocomplete/demo/). And I guess, there was probably some development last year(s), so I ask you - what would you use nowadays to auto-complete your form fields and why? BTW, I still have an open question on auto completion for HABTM association: http://stackoverflow.com/questions/1510935/how-to-do-habtm-management-with-auto-completion-in-rails

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  • Possible to see what actual SQL queries Rails invokes when using console script?

    - by randombits
    Sometimes I like to pop open the console script that comes with Rails to test small excerpts of code. That code normally involves some more involved ActiveRecord queries. Although not an expert in ActiveRecord, I'm proficient with SQL and want to see what it's translating underneath the hood for efficiency purposes. This will help me refactor or rethink how I'm writing my app if it looks inefficient. Now when the query is in the actual application itself, it all shows up in logs. Ad-hoc ActiveRecord queries in the console do not though. Anyway to change that behavior?

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  • How can I change the link format in will_paginate for page_cache in Ruby on Rails?

    - by jaehyun
    I want to use page_cache with will_paginate. There are good information on this page below. http://railsenvy.com/2007/2/28/rails-caching-tutorial#pagination http://railslab.newrelic.com/2009/02/05/episode-5-advanced-page-caching I wrote routes.rb looks like: map.connect '/products/page/:page', :controller => 'products', :action => 'index' But, links of url are not changed to '/products/page/:page' which are in will_paginate helper. They are still 'products?page=2' How can i change url format is in will_paginate?

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  • Ruby on Rails: one-to-one mapping. Just semantics or really a different structure.

    - by Sam
    So I'm creating a plugin for Ruby on Rails to make implemented addresses including country, state, city, and zip_code for countries that can follow that paradigm a lot easier but that's beside the point expect for how the address model is associated. So starting with my address model. class Address < ActiveRecord::Base has_one :country has_one :state has_one :city has_one :zip_code end What's the difference between saying belongs_to and has_one Seems to be the same thing because both only require one model to declare ownership and foreign_key And it also seems that both are logical to say. an address belongs to an account and an account has one address Is this only semantics or is there are real difference

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  • How do you crop a specific area with paperclip in Rails (3)?

    - by Smickie
    Hi, I have paperclip in Rails (3) working with simple cropping, for example the blow code makes a simple crop of the thumbnail: has_attached_file :image, :styles => { :thumb => "90x90#" }, :default_style => :thumb However I was wondering how do you crop a very specific area of an image; lets say you have an x and y coordinate to start from and then a width and height of the crop. How do you go about passing a complex style like this in? Thanks very much.

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  • Rails: find_by_sql and PREPARE stmt FROM... i cant make it work

    - by Totty
    I have this query and I have an error: 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;') Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SET @lower_limit := ((5 DIV 6) * 6); EXECUTE stmt USING @lower_limit' at line 1: 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; EDIT: after finding the answer to: http://stackoverflow.com/questions/2566620/mysql-i-need-to-get-the-offset-of-a-item-in-a-query i need another help here to port it to rails.

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  • Why is rails setting ":null => false" on all my columns in schema.rb?

    - by ryeguy
    Even if I never specify :null => false in my migrations that initially add columns to tables, rails still generates code in schema.rb that specifies the columns as having :null => false. Why is this? If I develop on my box, and then use rake db:schema:load on my production box, I'm going to get very different behavior! Edit: Even if I delete schema.rb and run rake db:schema:dump, it still puts :null => false on the new schema even if it isn't defined like that in the actual database. It seems it can't tell whether or not a column is marked as allowing nulls. I'm using SQLite if that helps.

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  • Which type of Rails model association should I use in this situation?

    - by jstayton
    I have two models/tables in my Rails application: discussions and comments. Each discussion has_many comments, and each comment belongs_to a discussion. My discussions table also includes a first_comment_id column and last_comment_id column for convenience and speed. I want to be able to call discussion.last_comment for the last comment model, but the following (in my discussion model) isn't working to make this happen: has_one :first_comment, :class_name => "Comment" has_one :last_comment, :class_name => "Comment" When I call discussion.last_comment, the following SQL is run: SELECT * FROM `comments` WHERE (`comments`.discussion_id = 1) LIMIT 1 It's using the discussions.id column to join against comments.discussion_id, when I want it to join discussions.last_comment_id against comments.id. Am I using the wrong type of association here? Thanks for your help!

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  • Attach 1 or more (non image) files to rails application, with having to install an image-processing

    - by Hinchy
    Hi all, I'm currently learning rails by creating a simple project management app. I've gotten to the point where I would like to be allow a user upload multiple files - pdfs, docs, xls etc. The user only needs to be able to attach one file at a time, but the possibilty to have multiple documents associated with a project is a must. I've spent quite a lot of time researching my options, and it appears the two main plugins are attachment_fu and paperclip. From what I've read though, these appear to concentrate specifically on the upload and subsequent resizing of images, something I couldn't care less about. Is there a simpler way to achieve what I'm trying? Thank you all in advance.

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  • How do you share pre-calculated data between calls to a Rails web service?

    - by Nigel Thorne
    I have a Rails app that allows users to build up a network structure and then ask questions about how to navigate around it. When adding nodes and connections these are just saved to the database. At the point you make a query of the network I calculate the shortest path from any node to any other node. Constructing this in memory takes a while (something I need to fix), but once it is there, you can instantly get the answer to any of these path questions. The question is... How do I share this network between calls to the website, so each request doesn't regenerate the paths network each time? Note: I am hosting this on apache server using passenger (mod ruby) Thoughts?

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  • Installing sqlite on windows xp for ruby on rails?

    - by bennybdbc
    I've been trying to follow this guide to installing ruby and rails on my new machine. I'm having problems, however, when it comes to the sqlite gem. I installed the gem, which seemed to work perfectly. Then, however, it tells me to download a zip file from http://www.sqlite.org/sqlitedll-3_7_3.zip. When I do, the file is downloaded, but it doesn't seem to be a zip file. It has the icon of a microsoft word file, and clicking on it opens up Word but the file isn't opened, it just shows error messages. There is no option to extract the file, which is what the guide says to do. Is this a problem with sqlite or my machine? Any help would be appreciated.

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  • How to Tweet from multiple acounts with twitter Gem in Rails?

    - by Jmlevick
    I have an application wich has Oauth access using Twitter as provider. I also have the ability to ask the logged user permisson to Read and Write in his/her account and once a user authorized the app, I can send tweets as the user with something like: u = User.find(id) u.twitter.update("Some-Status-Here") in the rails console... What I want to do is to Tweet as all the users in one command, but if I try something like: u = User.all u.twitter.update("Some-Status-Here") I get this error: undefined method `twitter' for #<Array:0x00000002e2f188> How can I tweet as all the users in one command? What am I doing wrong? I feel it is a very basic thing I'm missing... Can someone help me? Thank You.

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  • Rails: Is there a way to check for incomplete JPG file upload?

    - by user206481
    I have a Rails app that processes and serves up jpg files that were uploaded via FTP. On several occasions the FTP process was disconnected and left many incomplete .jpg files. I was surprised to see that the incomplete jpgs behave as normal jpg files in my app even tho they have incomplete image data. I have since implemented a more robust FTP process where the uploaded file is initially *.tmp and gets renamed to .jpg after an FTP success code is received. My problem is, I still have all of these incomplete jpg files on the server and can't figure out how to programmatically weed them out. I can actually display them in a view without generating any errors, but there is only a partial image there. I tried RMagick but they all successfully load (using Image.read) and report the valid x & y resolutions. I have so far not been able to determine a way to programmatically differentiate between an incomplete and complete jpg uploaded image. Any ideas?

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  • Rails Application expecting me to restart my webrick server for any change in my controller.

    - by Vamsi
    I am working on an existing Rails 2.3.x application, So I was working on it and it was a messy code with great difficulty I was able to run the application. But now for every small change in one of my controller it is expecting me to restart my serer otherwise the changes are not reflecting back, Let's take an example scenario here, Let's just say in one of the before_filter method I just added a puts statement on top of the method and it was not printing in the log, after I restart the server it is printing, Can some one please let me know if I am missing something here.

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  • How do I run multiple objects through an IF statement in rails?

    - by codyvbrown
    I am creating an application that highlights user messages from a stream based on whether or not the user has been 'vouched'. It works fine if it's setup for a single author. For example controller: @vouch = Vouch.last.vouched_user_nickname view: <% if tweet.from_user == @vouch %> <div class="flit_message_containerh">.... But I'm having trouble doing it for multiple user nicknames. @vouch = Vouch.find(:all, :select => "vouched_user_nickname", :group => 'vouched_user_nickname' ) Any ideas would be greatly appreciated. I'm a rails noob.

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  • A new Rails idea in views and no more controller. maybe better maybe worse, i need help if this is t

    - by Totty
    Hy, I was thinking that all my website will have use of cells, using the known plugin cell for rails, so this is my idea: A table that contains 3 fields: id, view_name and layout. the layout will be a serialized hash. When a request is made, the layout field is requested and then in the view, default layout, will be unserialized the layout var, that looks like this: @layout[:sidecol][:gallery] = {... some params for it...}; @layout[:maincol][:comments] = {..params...}; In the <% #ruby code to render the cells in the @layout[:sidecol] % will be some ruby code that will loop over the @layout[:sidecol] and render all cells in it. the same occurs in the maincol div. What do you think? Positive in my opinion: More modular controller is used only for post easy change of structure easier to implement some kind of traking to see diferences on what layout is better or not. Negative: not found yet

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  • Rails: How can I log all requests which take more than 4s to execute?

    - by Fedyashev Nikita
    I have a web app hosted in a cloud environment which can be expanded to multiple web-nodes to serve higher load. What I need to do is to catch this situation when we get more and more HTTP requests (assets are stored remotely). How can I do that? The problem I see from this point of view is that if we have more requests than mongrel cluster can handle then the queue will grow. And in our Rails app we can only count only after mongrel will receive the request from balancer.. Any recommendations?

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  • What database to use with Ruby on Rails, based on actual Hosting services ?

    - by IHawk
    Hello ! I've been looking for hosting services and I still don't know what kind of database is the most commom. It seems to be MySql and PostgreSql. So, I'm not sure about how much traffic and data my website will have (it's just a project), but I would like to be prepared. I've worked in some projects with Oracle (PL/SQL) and I know something from MySql. Based in this facts, What database to use with Ruby on Rails, based on actual Hosting services ? Thank you !

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  • Ruby on Rails ActiveScaffold: Showing {{model}} instead of model name?

    - by AnExtremelySmellyPerson
    Hi there, I'm using ActiveScaffold with Ruby on Rails and I'm loving it, however there is one weird thing. Whenever I hit "Edit" or "Create New" in my webapp's ActiveScaffold, it says "Create {{model}}" or "Update {{model}}" in the webapp rather than using the model's name. Why is this? I have an ads_controller.rb that includes this: active_scaffold :ad do |config| config.label = "Ads" config.columns = [:name, :description, :imageUrl, :linkUrl, :apps, :created_at, :updated_at] config.update.columns = [:name, :description, :imageUrl, :linkUrl, :apps] config.create.columns = config.update.columns list.sorting = {:created_at => 'DESC'} columns[:imageUrl].label = "Image URL" columns[:linkUrl].label = "Link URL" end And my routes.rb includes this: map.namespace :admin do |admin| admin.root :controller => 'admin_home', :action => 'index' admin.resources :ads, :active_scaffold => true end Any thoughts on why I'm seeing "Create {{model}}" instead of "Create ad" ?

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  • How do I setup a shared session between two users on my Ruby on Rails powered site?

    - by ben
    Hey guys, The website that I'm building includes a section where two users can interact. I think I know how to do most of it, except the actual session sharing part. I'm using Ruby on Rails & Javascript (jquery), and I've got user login and session management all working okay. Would the best way to create a shared session be to have a SharedSession model, with accompanying database table, with participant1ID, participant2ID etc? Is there a better way? Thanks so much for reading!

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  • Rails - How do you dynamically call the request methods "get put destroy etc" at runtime in tests

    - by adam
    I'm always writing tests to check my controller restricts people from certain actions depending on their status i.e. logged in, admin? etc Regardless of whether its a get to :index or a puts to :create the code is always the same. I'm trying to refactor this so that i have one method such as should_redirect_unauthenticated_to_login_action(request, action) and call it like so should_redirect_unauthenticated_to_login_action(:get, :index) = get :index But not sure how to dynamically call the various response methods rails provides for functional tests which seem to live in the module ActionController I mucked around with module = Kernel.const_get("ActionController") module::TestProcess.get NoMethodError: undefined method `get' for ActionController::TestProcess:Module can anyone help (im very new to dynamic calling in ruby)

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