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  • Multiple children in single form in rails

    - by CaptnCraig
    I have a model that has an arbitrary number of children entities. For simplicity lets call the entities Orders and Items. I would like to have a create Orders form where I input the order information, as well as add as many items as I want. If I click the "Add another item" button, a new set of form elements will be added to input the new data, amounts, etc.. I could hack this out in pure javascript, but I'm pretty sure there has to be a more magical, railsish way to do it, maybe with a partial view or something. I'm just a little too new to rails to know what it is. What is the best way to dynamically add the new form elements, and then to access them in the create controller?

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  • How do I find the .max of an attribute value among a group of different Models?

    - by Angela
    Hi, everyone: I am also open to just straight-up refactoring what I'm finding to be pretty repetitive, but to give a baseline of how it's working.... I have for every contact a Campaign, which has_many of three types of Models: Email, Call, and Letter. When an Email (Call or Letter) has been executed for a specific contact, I have a Contact_Email(_or_Call_or_Letter) which belongs to both the Contact and the Model (Email_or_Call_or_Letter). Each Contact_Email for example pairing has a :date_sent attribute. So does each Contact_Call and Contact_Letter. How do I find the latest of all of them? Here is the code I wrote that can find the latest Email and my finding retyping similar code for Call and Letter, but then stuck on how to do a .max on all of them: def last_email(contact) #get campaign the contact belongs to @campaign = Campaign.find_by_id(contact.campaign_id) @last_email = ContactEmail.find(:last, :conditions => "contact_id = #{contact.id}", :order => "date_sent DESC") @last_call = ContactCall.find(:last, :conditions => "contact_id = #{contact.id}", :order => "date_sent DESC") @last_letter = ContactLetter.find(:last, :conditions => "contact_id = #{contact.id}", :order => "date_sent DESC") # how do I get the latest of all of these to display? if @last_sent_email.nil? return "no email sent" else return @last_sent_email.date_sent end end Question 1: With what I have, how can I find effectively @last_event given I can find the last Email, last Call, and last Letter for every contact? Question 2: How can I remove the repetitive code that I have to write for each Model?

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  • Administrator account: Where, when and how?

    - by Pickels
    Where, when and how to insert/create the administrator account for a website? Here are a few ways I encountered in other websites/webapplication. Installation wizard: You see this a lot in blog software or forums. When you install the application it will ask you to create an administrator user. Private webapplication will most likely not have this. Installation file: A file you run to install your application. This file will create the administrator account for you. Configuration files: A configuration file that holds the credentials for the administrator account. Manually insert it into a database: Manually insert the administrator info into the database.

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  • Character Sets explained for Dummies!

    - by Imran
    I don't think i fully understand character sets so i was wondering if anyone would be kind enough to explain it in layman's terms with examples ( for Dummies).I know there is utf8, latin1, ascii ect The more answers the better really. Thank you in advance;-)

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  • Creating relationship between two model instances

    - by Lowgain
    This is probably pretty simple, but here: Say I've got two models, Thing and Tag class Thing < ActiveRecord::Base has_and_belongs_to_many :tags end class Tag < ActiveRecord::Base has_and_belongs_to_many :things end And I have an instance of each. I want to link them. Can I do something like: @thing = Thing.find(1) @tag = Tag.find(1) @thing.tags.add(@tag) If not, what is the best way to do this? Thanks!

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  • Is it possible to do have Capistrano do a checkout over a reverse SSH tunnel?

    - by James A. Rosen
    I am developing an application that resides on a public host but whose source I must keep in a Git repository behind a corporate firewall. I'm getting very tired of the slowness of deploying via scp (copying the whole repository and shipping it over SSH on each deploy) and would like to have the remote host simply do a git pull to update. The problem is that the firewall prohibits incoming SSH connections. Would it be possible for me to set up an SSH tunnel from my computer to the deployment computer and use my repository as the source for the git pull? After all, git is distributed, so my copy is just as valid a repository as the central one. If this is possible, what would the tunnel command and the Capistrano configuration be? I think the tunnel will look something like ssh -R something:deployserver.com:something [email protected]

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  • Hashes or tokens for "remember me" cookies?

    - by Emanuil Rusev
    When it comes to remember me cookies, there are 2 distinct approaches: Hashes The remember me cookie stores a string that can identify the user (i.e. user ID) and a string that can prove that the identified user is the one it pretends to be - usually a hash based on the user password. Tokens The remember me cookie stores a random (meaningless), yet unique string that corresponds with with a record in a tokens table, that stores a user ID. Which approach is more secure and what are its disadvantages?

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  • rails code within javascript

    - by Jesse
    I am trying to use some rails code withing a javascript and need to have that rails code be dynamically changed. Here's the line of code: $(this).replaceWith("<%= escape_javascript(render(:partial => 'shared/products')) %>"); The 'shared/products' is the part I want to change based off information passed earlier in the javascript. How do I insert a value from javascript so that instead of 'shared/products' the products portion can be a variable? Hope this makes sense. I'm not the most experienced jQuery/javascript programmer, so any help is very much appreciated. Thanks in advance!

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  • Is it possible to group validation?

    - by lambdabutz
    I am using a lot of my own validation methods to compare the data from one association to the other. I've noticed that I'm constantly checking that my associations aren't nil before trying to call anything on them, but I am also validating their presence, and so I feel that my nil checks are redundant. Here's an example: class House < ActiveRecord::Base has_one :enterance, :class => Door has_one :exit, :class => Door validates_presence_of :enterance, :exit validate :not_a_fire_hazard def not_a_fire_hazard if enterance && exit && enterance.location != exit.location errors.add_to_base('If there is a fire you will most likely die') return false end end end I feel like I am repeating myself by checking the existence of enterance and exit within my own validation. Is there a more "The Rails Way" to do this?

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  • Getting the first of a GROUP BY clause in SQL

    - by Michael Bleigh
    I'm trying to implement single-column regionalization for a Rails application and I'm running into some major headaches with a complex SQL need. For this system, a region can be represented by a country code (e.g. us) a continent code that is uppercase (e.g. NA) or it can be NULL indicating the "default" information. I need to group these items by some relevant information such as a foreign key (we'll call it external_id). Given a country and its continent, I need to be able to select only the most specific region available. So if records exist with the country code, I select them. If, not I want a records with the continent code. If not that, I want records with a NULL code so I can receive the default values. So far I've figured that I may be able to use a generated CASE statement to get an arbitrary sort order. Something like this: SELECT *, CASE region WHEN 'us' THEN 1 WHEN 'NA' THEN 2 ELSE 3 END AS region_sort FROM my_table WHERE region IN ('us','NA') OR region IS NULL GROUP BY external_id ORDER BY region_sort The problem is that without an aggregate function the actual data returned by the GROUP BY for a given row seems to be untameable. How can I massage this query to make it return only the first record of the region_sort ordered groups?

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  • "rake db:seed" no method error

    - by louddwarf
    when I try and run the "rake db:seed" command the rails console outputs "NoMethodError: undefined method `db' for #" not quite sure what going on. I'm using netbeans to build my rails project which is using the built-in JRuby 1.2 would that have anything to do with it?

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  • Setting default_scope according to some criteria

    - by Tam
    I'm trying to set default scope according to some criteria determined by ana ActionController before_filter. In controller: before_filter :authorize ... def authorize if some_condition @default_scope_conditions = something elsif another_condition @default_scope_conditions = something_else end end Inside the ActiveRecord default_scope :conditions => @default_scope_conditions But it doesn't seem to work, the before filter gets called but the default_scope doesn't get set. Could you please advise me what I'm doing wrong and how to fix it or suggest me some other way of achieving that.

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  • How do I create multiple submit buttons for the same form in Rails?

    - by Angela
    I need to have multiple submit buttons. I have a form which creates an instance of Contact_Call. One button creates it as normal. The other button creates it but needs to have a different :attribute value from the default, and it also needs to set the attribute on a different, but related model used in the controller. How do I do that? I can't change the route, so is there a way to send a different variable that gets picked up by [:params]? And if I do then, what do I do in the controller, set up a case statement?

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  • Methodology for a Rails app

    - by Aaron Vegh
    I'm undertaking a rather large conversion from a legacy database-driven Windows app to a Rails app. Because of the large number of forms and database tables involved, I want to make sure I've got the right methodology before getting too far. My chief concern is minimizing the amount of code I have to write. There are many models that interact together, and I want to make sure I'm using them correctly. Here's a simplified set of models: class Patient < ActiveRecord::Base has_many :PatientAddresses has_many :PatientFileStatuses end class PatientAddress < ActiveRecord::Base belongs_to :Patient end class PatientFileStatus < ActiveRecord::Base belongs_to :Patient end The controller determines if there's a Patient selected; everything else is based on that. In the view, I will be needing data from each of these models. But it seems like I have to write an instance variable in my controller for every attribute that I want to use. So I start writing code like this: @patient = Patient.find(session[:patient]) @patient_addresses = @patient.PatientAddresses @patient_file_statuses = @patient.PatientFileStatuses @enrollment_received_when = @patient_file_statuses[0].EnrollmentReceivedWhen @consent_received = @patient_file_statuses[0].ConsentReceived @consent_received_when = @patient_file_statuses[0].ConsentReceivedWhen The first three lines grab the Patient model and its relations. The next three lines are examples of my providing values to the view from one of those relations. The view has a combination of text fields and select fields to show the data above. For example: <%= select("patientfilestatus", "ConsentReceived", {"val1"="val1", "val2"="val2", "Written"="Written"}, :include_blank=true )% <%= calendar_date_select_tag "patient_file_statuses[EnrollmentReceivedWhen]", @enrollment_complete_when, :popup=:force % (BTW, the select tag isn't really working; I think I have to use collection_select?) My questions are: Do I have to manually declare the value of every instance variable in the controller, or can/should I do it within the view? What is the proper technique for displaying a select tag for data that's not the primary model? When I go to save changes to this form, will I have to manually pick out the attributes for each model and save them individually? Or is there a way to name the fields such that ActiveRecord does the right thing? Thanks in advance, Aaron.

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  • Rails populate edit form for non-column attributes

    - by Rabbott
    I have the following form: <% form_for(@account, :url => admin_accounts_path) do |f| %> <%= f.error_messages %> <%= render :partial => 'form', :locals => {:f => f} %> <h2>Account Details</h2> <% f.fields_for :customer do |customer_fields| %> <p> <%= customer_fields.label :company %><br /> <%= customer_fields.text_field :company %> </p> <p> <%= customer_fields.label :first_name %><br /> <%= customer_fields.text_field :first_name %> </p> <p> <%= customer_fields.label :last_name %><br /> <%= customer_fields.text_field :last_name %> </p> <p> <%= customer_fields.label :phone %><br /> <%= customer_fields.text_field :phone %> </p> <% end %> <p> <%= f.submit 'Create' %> </p> <% end %> As well as attr_accessor :customer And I have a before_create method for the account model which does not store the customer_fields, but instead uses them to submit data to an API.. The only thing I store are in the form partial.. The problem I'm running into is that when a validation error gets thrown, the page renders the new action (expected) but none of the non-column attributes within the Account Detail form will show? Any ideas as to how I can change this code around a bit to make this work me?? This same solution may be the help I need for the edit form, I have a getter for the data which it asks the API for, but without place a :value = "asdf" within each text box, it doesn't populate the fields either..

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  • Get string value from http response with Mechanize

    - by Gearóid
    Hi, I'm currently integrating facebook into my current app and I've succeeded in retrieving the access_token using the following code: url="#{url}?#{client_id}&#{client_secret}&#{code}&#{redirect_uri}&type=client_cred" agent = Mechanize.new page = agent.get(url) The page object above has a body which contains text something along the lines of access_token=XXXXX I just want to pull out the access_token value. I can get the entire string simply by writing: page.body But I was wondering is there a way to get the access_token value without resorting to regular expressions etc? Thanks.

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  • Formatting Dates in Rails 3.0

    - by Neil Middleton
    I'm trying to format a date in Rails 3 using the new syntax as described in the code: http://github.com/rails/rails/blob/master/activesupport/lib/active_support/core_ext/date/conversions.rb by using the following syntax in an initialiser: Date::DATE_FORMATS[:my_format] = '%m %d %Y' I am then referencing dates in my view like so: comment.created_at.to_formatted_s(:my_format) However, I'm just getting the default formatting - what could be wrong?

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  • Get pixel color with Rails or anything else

    - by ulf
    I'd like to build a webapp in Rails in which I'd like to determine every pixel's color of a given image (JPEG). Is there any possibility to do that with Rails or JavaScript? The goal is to write an algorithm which determines the "middle color" of the image and uses it for background color of the site. Any suggestion would be appreciated.

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  • form serialize problem

    - by ZX12R
    I have a form. I am trying to validate it through AJAX GET requests. So i am trying to send the field values in the GET request data. $('#uxMyForm').serialize(); the problem it is returning something undecipherable. I have used serialize before. This is totally bizzare. the return value of serialize is authenticity_token=oRKIDOlPRqfnRehedcRRD7WXt6%2FQ0zLeQqwIahJZJfE%3D&customer%5BuxName%5D=&customer%5BuxEmail%5D=&customer%5BuxResidentialPhone%5D=&customer%5BuxMobilePhone%5D=&customer%5BuxDateOfBirth%5D=&customer%5BuxAddress%5D=&customer%5BuxResidentialStatus%5D= i have no idea how to use this. Thanks

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  • Passing arguments to an Rspec SpecTask

    - by Bayard Randel
    Rake allows for the following syntax: task :my_task, :arg1, :arg2 do |t, args| puts "Args were: #{args}" end I'd like to be able to do the same, but with RSpecs SpecTask. The following unfortunately fails: desc "Run example with argument" SpecTask.new('my_task'), :datafile do |t, args| t.spec_files = FileList['cvd*_spec.rb -datafile=#{args}'] t.spec_opts = ["-c -f specdoc"] end Is it possible to achieve this with a SpecTask, or is there an alternative approach?

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  • What is the difference between a restful route method for getting an index vs. creating a new object

    - by Jason
    According to rake routes, there's the same path for getting an index of objects as there is for creating a new object: cars GET /cars(.:format) {:controller=>"plugs", :what=>"car", :action=>"index"} POST /cars(.:format) {:controller=>"plugs", :what=>"car", :action=>"create"} Obviously, the HTTP verb is what distinguishes between them. I want the "create" version of the cars_path method, not the "index" version. My question is what route method do you invoke to choose the one you want? I'm telling cucumber what path to generate with this: when /the car plug preview page for "(.+)"/ cars_path(:action => :create, :method => :post) ...but it always chooses the "index" action, not "create". I've tried lots of combinations for the hash argument following cars_path and nothing changes it from choosing "index" instead of "create". I'll get an error like this: cars_url failed to generate from {:controller=>"plugs", :method=>:post, :what=>"car", :action=>"create"}, expected: {:controller=>"plugs", :what=>"car", :action=>"index"}, diff: {:method=>:post, :action=>"index"} (ActionController::RoutingError) This seems like a very simple question but I've had no luck googling for it, so could use some advice. Thanks.

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