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• Rails object inheritence with belongs_to

  - by Rabbott

  I have a simple has_many/belongs_to relationship between Report and Chart. The issue I'm having is that my Chart model is a parent that has children. So in my Report model I have class Report < ActiveRecord::Base has_many :charts end And my Chart model is a parent, where Pie, Line, Bar all inherit from Chart. I'm not sure where the belongs_to :report belongs within the chart model, or children of chart model. I get errors when I attempt to access chart.report because the object is of type "Class" undefined local variable or method `report' for #< Class:0x104974b90 The Chart model uses STI so its pulling say.. 'Pie' from the chart_type column in the charts table.. what am I missing?

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• Rails error_messages helper

  - by Bob

  This is a very common piece of code <% form_for :blah... do |f| %> <%= f.error_messages %> First name: <%= f.text_field :first_name %><br /> .... <% end %> error_messages is a helper method but I am having a hard time finding the documentation for it, why is that?

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• I am having trouble with my first project in ruby on rails

  - by Sebastian

  Here's my index action in the books controller: http://pastebin.com/XdtGRQKV Here's the view for the action i just mentioned: http://pastebin.com/nQFy400m Here's the result without being logged in: http://i.imgur.com/rQoiw.jpg Here's the result when i'm logged in with the user 'admin': http://i.imgur.com/E1CUr.jpg So the problem is that, in the view, before line 25 the 'user' variable seems to be empty ( or not loaded), and after line 25 the variable 'user' has the expected values. I have tried initializing a variable in the index method of the books controller but get exactly the same results. Thanks in advance! BTW had to make the links text because of stackoverflow limit.

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• How to refresh a parent page #Rails

  - by sameera

  Hi Guys, I have the fllowing requirement, I have a model called Task to display user tasks 1 . Link to add a new task (in the tasks index page) 2 . when a user click the link, 'tasks/new' action will open up inside a popup 3 . when the user save the new task, I want to close 'new task' popup and refresh the parent page 'tasks/index' so that new task will display I guess, i will have to execute a page reload java script at the end of 'tasks/create' action. But i'm not sure how to. can anyone help me out to make this happen, thanks in advance cheers, sameera

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• Getting the value from an array in the model in rails

  - by slythic

  Hi all, I have a relatively simple problem. I have a model named Item which I've added a status field. The status field will only have two options (Lost or Found). So I created the following array in my Item model: STATUS = [ [1, "Lost"], [2, "Found"]] In my form view I added the following code which works great: <%= collection_select :item, :status, Item::STATUS, :first, :last, {:include_blank => 'Select status'} %> This stores the numeric id (1 or 2) of the status in the database. However, in my show view I can't figure out how to convert from the numeric id (again, 1 or 2) to the text equivalent of Lost or Found. Any ideas on how to get this to work? Is there a better way to go about this? Many thanks, Tony

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• Get SEO friendly URLS with Rails without method_missing?

  - by tesmar

  Hi all, Currently we are using method_missing to catch for calls to SEO friendly actions in our controllers rather than creating actions for every conceivable value for a variable. What we want are URLS like this: /students/BobSmith and NOT /students/show/342 IS there a cleaner solution than method_missing? Thank you!

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• Respond_to in rails

  - by piemesons

  respond_to do |format| format.html format.xml { render :xml => @mah_blogz } end respond_to do |format| format.js end Whats this respond_to, format.html, format.xml and format.js. Whats the purpose, How they work.

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• Searching in Rails 3

  - by cbarton

  Here is the situation: I have the need to search for specifics or generals, much like expedia.com or your local library catalog search. In that there are fields that may or may not be filled out based on the individual need. It acts much like an "advanced search page". I have all of that code done for the models/controller and such and have it setup with a Searches controller along with matching model and views. The question that I have is there a way to cut down the amount of parameters posted to GET so that the url isn't search?search[:a]=""+search[:b]=""+search[:c]="x"... plus the unicode checkmark. I only want the filled out fields to be shown in the response link especially minus the checkmark. cbarton

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• How to get id of the saved record in Ruby on Rails

  - by railsnew

  I am doing this from the console but I'd like to do this in my code too. Basically I am trying to add a record to the table and then get the id back. >> @record = Physician.create(:pname => "someone2") => #<Physician id: nil, pname: "someone2", pgroup: nil, created_at: nil, updated_at: nil, userid: nil, storeid: nil, licexpdate: nil, address: nil> >> @record.save => false >>

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• Rails HTML editor to create forms

  - by Ignace

  Hey all, I'm looking for a HTML editor which can be (easiliy) integrated in a RoR app that has the possibility to create forms. Not forms per se, but I need the possibility to add radiobuttons, input fields, checkboxes and so on. I loved the smoothness of TinyMCE, but apparently this doesn't take me far enough. Does there exists such a gem/plugin? Thanks!

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• Using before_create in Rails to normalize a many to many table

  - by weotch

  I am working on a pretty standard tagging implementation for a table of recipes. There is a many to many relationship between recipes and tags so the tags table will be normalized. Here are my models: class Recipe < ActiveRecord::Base has_many :tag_joins, :as => :parent has_many :tags, :through => :tag_joins end class TagJoin < ActiveRecord::Base belongs_to :parent, :polymorphic => true belongs_to :tag, :counter_cache => :usage_count end class Tag < ActiveRecord::Base has_many :tag_joins, :as => :parent has_many :recipes, :through => :tag_joins, :source => :parent , :source_type => 'Recipe' before_create :normalizeTable def normalizeTable t = Tag.find_by_name(self.name) if (t) j = TagJoin.new j.parent_type = self.tag_joins.parent_type j.parent_id = self.tag_joins.parent_id j.tag_id = t.id return false end end end The last bit, the before_create callback, is what I'm trying to get working. My goal is if there is an attempt to create a new tag with the same name as one already in the table, only a single row in the join table is produced, using the existing row in tags. Currently the code dies with: undefined method `parent_type' for #<Class:0x102f5ce38> Any suggestions?

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• Ruby on Rails POST parameters on redirect_to

  - by Splashlin

  I have to make a call to a different url in one of my controllers on my site. The problem is that with all the parameters the other site requires I'm overflowing the url. Is there anyway to call another url from the controller and send all of the parameters using a POST? I'm not expecting a response from the other site. Also, I think there's a way to do this using the Net::HTTP library thought I'm not sure how. Thanks

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• Routing error when trying to use same view for update and create flows (Rails 3)

  - by Jamis Charles

  My overall use case: I have a Listing model that has many images. The Listing detail page lists all the fields that can be updated inline (through ajax). I want to be able to use the same view for both update listing and create new listing. My listing controller looks as follows: def detail @listing = Listing.find(params[:id]) @image = Image.new #should this link somewhere else? respond_to do |format| format.html # show.html.erb format.xml { render :xml => @listing } end end def create # create a new listing and save it immediately. Assign it to guest, with a status of "draft" @listing = Listing.new(:price_id => 1) # Default price id # save it to db # TODO add validation that it has to have a price ID, on record creation. So the view doesn't break. @listing.save @image = Image.new # redirect_to "/listings/detail/@listing.id" #this didn't work respond_to do |format| format.html # show.html.erb format.xml { render :xml => @listing } end end The PROBLEM I'm using a partial that shows the same form for the create view and the detail view. This works perfectly except for one thing: When I pull up http://0.0.0.0:3000/listings/detail/7, it works perfectly. When I pull up http://0.0.0.0:3000/listings/new, I get the following error: Showing /Applications/MAMP/htdocs/rails_testing/feedbackd/app/views/listings/_edit_form.html.erb where line #100 raised: No route matches {:action="show", :controller="images"} Extracted source (around line #100): 97: <!-- Form for new images --> 98: <div class="span-20 append-bottom"> 99: <!-- <%# form_for :image, @image, :url => image_path, :html => { :multipart => true } do |f| %> --> 100: <%= form_for @image, :url => image_path, :html => { :multipart => true } do |f| %> 101: <%= f.text_field :description %><br /> 102: <%= f.file_field :photo %> 103: <%= submit_tag "Upload" %> What I think the issue is: When I upload a new image (I'm using Paperclip), it requires the listing_id to create the image record. Since the listing_id isn't passed in with listings/new it can't find the listing_id. How can I pass in the id? Via a redirect? What's the best way to solve this? Thank you.

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• How to test Gem Extensions in Rails

  - by rube_noob

  I have written an extension to an existing gem (that is stored in lib) and a corresponding test for my extension. How could I go about running the gem's tests as well as my own automatically. What is the best practice for this case?

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• How To Create A Link For "save Image As" To Download an Image In Rails

  - by Kuya

  I want to make a link download like this http://idwallpaper.com/download.php?image_id=1517 I have tried on other tutorial like this <script> function SaveFile(fname){ img.document.execCommand('saveas', null ,fname) } </script> <iframe id="img" src="myimage.jpg" width="(image width + 20)px" height="(image height + 25)px" scrolling="no" frameborder="0px"></iframe> <button onclick="SaveFile('myimage.jpg');">save as</button> Does not work in FireFox though.....

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• Custom Rails Validation (Doesn't seem to be working)

  - by Karl Entwistle

  Hey guys ive got the following Model for Accounts require 'net/http' require 'uri' require 'date' class Account < ActiveRecord::Base validates_presence_of :username, :password, :on => :update validate :valid_expiry_date, :on => :update def valid_expiry_date reply = Net::HTTP.get URI.parse("http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=getaccountdetails_v1&type=prem&login=" + username + "&password=" + password) account = Time.at(reply[80..90].to_i) if (Time.now + 2419200) <= account return true else return false errors.add_to_base("Sorry this account isnt valid") end end end I know the code works in a ruby.rb file and will return true or false, however I seem to be having rather a lot of difficultly trying to translate this code into an actual validation, any help would be much appreciated. Thanks :) Its also defiantly at least connecting to the website as my firewall asked me if the Terminal was aloud to access it. At the moment not only is it displaying no errors its actually letting anything through and saving it.

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• Get methods params type parsing wsdl file in a rails/ruby application

  - by Marco Sangiorgi

  Hi, I have a question about ruby and wsdl soap. I couldn't find a way to get each method's params and their type. For example, if I found out that a soap has a methods called "get_user_information" (using wsdlDriver) is there a way to know if this method requires some params and what type of params does it require (int, string, complex type, ecc..)? I'd like to be able to build html forms from a remote wsdl for each method... Sorry for my horrible English :D

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• Background processing in Rails

  - by Shreyas Satish

  A certain function in my controller takes a lot of time to process (heavy db work) . So when my user clicks on "submit" on the form he has to wait for the process to complete which is quite long. Is there any way that on "submitting", the user is redirected to the next view without any delay while the processing continues in the back-end without making the user wait ? Thanks & Cheers !

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• Rails always include (join) on initialize

  - by Seth

  Hello, I have a User model as illustrated below: class User < ActiveRecord belongs_to :college belongs_to :class_level end I want to ALWAYS join with those other two tables returning one simplified User object. How do I accomplish this in my User model. I'm aware that I can do this in another model: class Foo < ActiveRecord has_many :users, :include => [:college, :class_level] end But I want to do this in my User model, so Foo.users will either be eager loaded OR be joined already. Is there a way to create an initialize this in the User model?

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• Rails has_one vs belongs_to semantics

  - by Anurag

  I have a model representing a Content item that contains some images. The number of images are fixed as these image references are very specific to the content. For example, the Content model refers to the Image model twice (profile image, and background image). I am trying to avoid a generic has_many, and sticking to multiple has_one's. The current database structure looks like: contents - id:integer - integer:profile_image_id - integer:background_image_id images - integer:id - string:filename - integer:content_id I just can't figure out how to setup the associations correctly here. The Content model could contain two belongs_to references to an Image, but that doesn't seem semantically right cause ideally an image belongs to the content, or in other words, the content has two images. This is the best I could think of (by breaking the semantics): class Content belongs_to :profile_image, :class_name => 'Image', :foreign_key => 'profile_image_id' belongs_to :background_image, :class_name => 'Image', :foreign_key => 'background_image_id' end Am I way off, and there a better way to achieve this association?

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• Ruby on Rails: instance & class variables not maintaining value in controller

  - by DerNalia

  at the top of my controller, outside of any method, I have @@javascript_is_disabled = false and I have methods that that the view calls and invokes something like this @@javascript_is_disabled = params[:javascript_disabled] but when I need the @@javascript_is_disabled in completely different method.. it is always false. I know it changes in the method with params args... cause those methods behave differently, and appropriately And ideas?

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• JSON is not nested in rails view

  - by SeanGeneva

  I have a several models in a heirarchy, 1:many at each level. Each class is associated only with the class above it and the one below it, ie: L1 course, L2 unit, L3 unit layout, L4 layout fields, L5 table fields (not in code, but a sibling of layout fields) I am trying to build a JSON response of the entire hierarchy. def show @course = Course.find(params[:id]) respond_to do |format| format.html # show.html.erb format.json do @course = Course.find(params[:id]) @units = @course.units.all @unit_layouts = UnitLayout.where(:unit_id => @units) @layout_fields = LayoutField.where(:unit_layout_id => @unit_layouts) response = {:course => @course, :units => @units, :unit_layouts => @unit_layouts, :layout_fields => @layout_fields} respond_to do |format| format.json {render :json => response } end end end end The code is bring back the correct values, but the units, unit_layouts and layout_fields are all nested at the same level under course. I would like them to be nested inside their parent.

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• Operations inside Rails I18n locales' strings

  - by Cristobal Viedma

  Hi, I am trying to put operations inside the locales to adapt to different languages. For example, in English a billion is 1,000,000,000, however in Spanish a billion is 1,000,000,000,000 so I would like to be able to have the following: en: billion: "You have %{money} billions" es: billion: "Tienes %{money/1000.0} billones" In order to be able to write: I18n.t :billion, :money => whatever And be right for whatever language. However, it seems that I cannot put operations inside the locales' strings. Any hint on how should I be doing this? Maybe my approach is just wrong "philosophically" talking? Thanks all!

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• Rails select helper - Default selected value, how?

  - by totocaster

  Here a code I'm using now. <%= f.select :project_id, @project_select %> How to modify it to make it it's default value params[:pid] when page is loaded?

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• Obfuscating ids in Rails app

  - by fphilipe

  I'm trying to obfuscate all the ids that leave the server, i.e., ids appearing in URLs and in the HTML output. I've written a simple Base62 lib that has the methods encode and decode. Defining—or better—overwriting the id method of an ActiveRecord to return the encoded version of the id and adjusting the controller to load the resource with the decoded params[:id] gives me the desired result. The ids now are base62 encoded in the urls and the response displays the correct resource. Now I started to notice that subresources defined through has_many relationships aren't loading. e.g. I have a record called User that has_many Posts. Now User.find(1).posts is empty although there are posts with user_id = 1. My explanation is that ActiveRecord must be comparing the user_id of Post with the method id of User—which I've overwritten—instead of comparing with self[:id]. So basically this renders my approach useless. What I would like to have is something like defining obfuscates_id in the model and that the rest would be taken care of, i.e., doing all the encoding/decoding at the appropriate locations and preventing ids to be returned by the server. Is there any gem available or does somebody have a hint how to accomplish this? I bet I'm not the first trying this.

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