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  • Foreign Key Relationship in Rails

    - by Steve
    Hi...I am a beginner in Rails and I read that the Rails enforces the foreign key relationships at the model level and also at the database level in the migration file, while creating the table. Is it really necessary and what kind of advantage does it provide

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  • Showing response time in a rails app.

    - by anshul
    I want to display a This page took x seconds widget at the bottom of every page in my rails application. I would like x to reflect the approximate amount of time the request spent on my server. What is the usual way this is done in Rails?

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  • [rails] do we need database level constraints

    - by shrimpy
    i have the same problem as in the following post http://stackoverflow.com/questions/1451570/ruby-on-rails-database-migration-not-creating-foreign-keys-in-mysql-tables so i am wondering, why rails do not support generate foreign key by default??? it is not necessary??? or we suppose to do it manually?

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  • Override a Rails Engine controller action

    - by sad sheep
    Hello, i'm using a Rails engine, but i need to customize some controllers actions. I actually forked the engine, and implementing those customizations into my own fork, but i was wondering if there is an official way in Rails Engines to override and customize controllers.

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  • Can't run rails server as daemon

    - by Jim
    I'm using rails 2.3.2 and when I run script/server -d, the only output I get is = Booting Mongrel = Rails 2.3.2 application starting on http://0.0.0.0:3000 which is fine. But when I check for anything running on port 3000, i get nothing. Any ideas?

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  • Rails :Is this caching problem

    - by Ankit
    Hi, I'm new to rails, and have taken some existing site for new enhancements. I mirrored rails application from remote server, and running locally using "ruby script/server" server. The problem is any changes to the files are not being reflected in web browser. Is this because of caching somehwere. Can someone pls point me where should Ilook to disable this or come back to development env?

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  • Annotate gem and rails 3.1

    - by vincent jacquel
    Does anyone have any idea why annotate does not work anymore in rails 3.1 ? When trying to run it with : $ rvmsudo bundle exec annotate --position before and given I've got the following in my gemfile: gem "annotate", '2.4.0' I get the following error: /usr/local/rvm/gems/ruby-1.9.2-p180@rails31/gems/activerecord-3.1.0/lib/active_record /railties/databases.rake:3:in `<top (required)>': undefined method `namespace' for main:Object (NoMethodError) I'm using RVM with a gemset dedicated to rails 3.1 with Ruby 1.9.2

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  • :any option for rails 3 routes

    - by user357523
    In rails 2 you can use the :any option to define a custom route that responds to any request method e.g. map.resources :items, :member => {:erase => :any} rails 3 doesn't seem to support the :any option resources :items do get :erase, :on => :member # works any :erase, :on => :member # doesn't work end does anyone know if this option has been removed or just renamed?

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  • How to evaluate the quality of Rails code?

    - by Fortuity
    In a code review, what do you look for to assess a developer's expertise? Given an opportunity to look at a developer's work on a real-world project, what tell-tale signs are a tip-off to carelessness or lack of experience? Conversely, where do you look in the code to find evidence of a developer's skill or knowledge of best practices? For example, if I'm looking at a typical Rails app, I would be happy to see the developer is using RSpec (showing a commitment to using test-driven development and knowledge that RSpec is currently more popular than the default TestUnit). But in examining the specs for a Rails model, I see that the developer is testing associations, which might indicate a lack of real understanding of Rails testing requirements (since such tests are redundant given that they only test what's already implemented and tested in ActiveRecord). More generally, I might look to see if developers are writing their own implementations versus using widely available gems or if they are cleaning up code versus leaving lots of commented-out "leftovers." What helps you determine the skill of a Rails developer? What's your code quality checklist?

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  • How to evaluate the quality of Rails code?

    - by Fortuity
    In a code review, what do you look for to assess a developer's expertise? Given an opportunity to look at a developer's work on a real-world project, what tell-tale signs are a tip-off to carelessness or lack of experience? Conversely, where do you look in the code to find evidence of a developer's skill or knowledge of best practices? For example, if I'm looking at a typical Rails app, I would be happy to see the developer is using RSpec (showing a commitment to using test-driven development and knowledge that RSpec is currently more popular than the default TestUnit). But in examining the specs for a Rails model, I see that the developer is testing associations, which might indicate a lack of real understanding of Rails testing requirements (since such tests are redundant given that they only test what's already implemented and tested in ActiveRecord). More generally, I might look to see if developers are writing their own implementations versus using widely available gems or if they are cleaning up code versus leaving lots of commented-out "leftovers." What helps you determine the skill of a Rails developer? What's your code quality checklist?

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  • Custom field names in Rails error messages

    - by Madhan ayyasamy
    The defaults in Rails with ActiveRecord is beautiful when you are just getting started and are created everything for the first time. But once you get into it and your database schema becomes a little more solidified, the things that would have been easy to do by relying on the conventions of Rails require a little bit more work.In my case, I had a form where there was a database column named “num_guests”, representing the number of guests. When the field fails to pass validation, the error messages is something likeNum guests is not a numberNot quite the text that we want. It would be better if it saidNumber of guests is not a numberAfter doing a little bit of digging, I found the human_attribute_name method. You can override this method in your model class to provide alternative names for fields. To change our error message, I did the followingclass Reservation ... validates_presence_of :num_guests ... HUMAN_ATTRIBUTES = { :num_guests = "Number of guests" } def self.human_attribute_name(attr) HUMAN_ATTRIBUTES[attr.to_sym] || super endendSince Rails 2.2, this method is used to support internationalization (i18n). Looking at it, it reminds me of Java’s Resource Bundles and Spring MVC’s error messages. Messages are defined based off a key and there’s a chain of look ups that get applied to resolve an error’s message.Although, I don’t see myself doing any i18n work in the near-term, it is cool that we have that option now in Rails.

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  • Way to view Rails Migration output

    - by Ganesh Shankar
    Is there an easy way to see the actual SQL generated by a rails migration? I have a situation where a migration to change a column type worked on my local development machine by partially failed on the production server. My postgreSQL versions are different between local and production (7 on production, 8 on local) so I'm hoping by looking at the SQL generated on the successful migration locally I can work out a SQL statement to run on production to fix things....

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  • Connect Rails model to non-rails database

    - by the_snitch
    I'm creating a new web application (Rails 3 beta), of which pieces of it will access data from a legacy mysql database that a current php application is using. I do not wish to modify the legacy db schema, I just want to be able to read/write to it, as well as the rails application having it's own database using activerecord for the newer stuff. I'm using mysql for the rails app, so I have the adapter installed. How is the best way to do this? For example, I want contacts to come from the old database. Should I create a contacts controller, and manually call sql to get the variables for the views? Or should I create a Contact model, and define attributes that match the fields in the database, and am I able to use it like Contact.mail_address to have it call "SELECT mailaddr FROM contacts WHERE id=Contact.id". Sorry, I've never done much in Rails outside of the standard stuff that is documented well. I'm not sure of what the best approach would be. Ideally, I want the contacts to be presented to my rails application as native as possible, so that I can expose them RESTfully for API access. Any suggestions and code examples would be much appreciated

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  • Pgagent startup script (under the postgres user)

    - by Dominique Guardiola
    Hello, I'm trying to make a clean startup script for pgagent I found one here but I don't see how I can change this : if start-stop-daemon --start --quiet --pidfile /var/run/pgagent.pid \ --exec /usr/bin/pgagent "hostaddr=127.0.0.1 dbname=postgres user=postgres \ password=XXXXXXX";then to launch something like this : su - postgres -c /usr/bin/pgagent "hostaddr=127.0.0.1 dbname=postgres user=postgres" in order to avoid to hard-code the PG password in the script. This is possible using the .pgpass file feature. It works when I'm logged under the postgres user. So my only problem left is how to launch this command under the postgres user tried to add --user=postgres in the call, like mentioned here but it does not work.

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  • Completely remove Postgres on Mac OSX Lion

    - by Nai
    I'm trying to get postgis running on my machine. Running brew install postgis seems to have installed postgres 9.2.1 on to my machine. I would like to remove my previous version 9.1.2 to keep my environment clean. Running brew uninstall postgres removes 9.2.1. What's the best way to do this? UPDATE nai@nyc ~ $ brew versions postgresql 9.2.1 git checkout ed92469 /usr/local/Library/Formula/postgresql.rb 9.2.0 git checkout 2f6cbc6 /usr/local/Library/Formula/postgresql.rb 9.1.5 git checkout 6b8d25f /usr/local/Library/Formula/postgresql.rb 9.1.4 git checkout c40c7bf /usr/local/Library/Formula/postgresql.rb 9.1.3 git checkout 05c7954 /usr/local/Library/Formula/postgresql.rb 9.1.2 git checkout dfcc838 /usr/local/Library/Formula/postgresql.rb 9.1.1 git checkout 4ef8fb0 /usr/local/Library/Formula/postgresql.rb 9.0.4 git checkout 2accac4 /usr/local/Library/Formula/postgresql.rb 9.0.3 git checkout b782d9d /usr/local/Library/Formula/postgresql.rb 9.0.2 git checkout 2c3b88a /usr/local/Library/Formula/postgresql.rb 9.0.1 git checkout b7fab6c /usr/local/Library/Formula/postgresql.rb 9.0.0 git checkout 1168d8f /usr/local/Library/Formula/postgresql.rb 8.4.4 git checkout c32bea0 /usr/local/Library/Formula/postgresql.rb 8.4.3 git checkout 237d1c5 /usr/local/Library/Formula/postgresql.rb

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  • Too Few Arguments

    - by NoahClark
    I am trying to get some Javascript working in my Rails app. I want to have my index page allow me to edit individual items on the index page, and then reload the index page upon edit. My index.html.erb page looks like: <div id="index"> <%= render 'index' %> </div> In my index.js.erb I have: $('#index').html("<%=j render 'index' %>"); and in my holders_controller: def edit holder = Holder.find(params[:id]) end def update @holder = Holder.find(params[:id]) if @holder.update_attributes(params[:holder]) format.html { redirect_to holders_path } #, flash[:success] = "holder updated") ## ^---Line 28 in error format.js else render 'edit' end end When I load the index page it is fine. As soon as click the edit button and it submits the form, I get the following: But if I go back and refresh the index page, the edits are saved. What am I doing wrong?

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  • Rails 3 memory issue

    - by Erik
    Hello! I'm developing a new site based on Ruby on Rails 3 beta. I knew this might be a bad idea considering it's just beta, but I still thought it might work. Now though I'm having HUGE problems with Rails consuming huge ammounts of memory. For my application today it consumes about 10 mb per request and it doesn't seem to release it either. So I thought this might be because of bloat in my application and thus I created a test app just to compare. For my test app I just generated a model with a scaffold and then created about 20 records on this model. I then went to the index page and hit refresh and I could immediately see memory taking off! Less than my app but still about 1-3 mb per request. I'm working in OSX Leopard, with Ruby 1.8.7, Rails 3.0.0.beta and a SQLLite db for development. Does anyone recognize my problem? I would really appreciate some help here. :/ Thanks!

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  • Ruby on Rails controller and architecture with cells

    - by dt
    I decided to try to use the cells plugin from rails: http://cells.rubyforge.org/community.html given that I'm new to Ruby and very used to thinking in terms of components. Since I'm developing the app piecemeal and then putting it together piece by piece, it makes sense to think in terms of components. So, I've been able to get cells working properly inside a single view, which calls a partial. Now, what I would like to be able to do (however, maybe my instincts need to be redirected to be more "Rails-y"), is call a single cell controller and use the parameters to render one output vs. another. Basically, if there were a controller like: def index params[:responsetype] end def processListResponse end def processSearchResponse end And I have two different controller methods that I want to respond to based on the params response type, where I have a single template on the front end and want the inner "component" to render differently depending on what type of request is made. That allows me to reuse the same front-end code. I suppose I could do this with an ajax call instead and just have it rerender the component on the front end, but it would be nice to have the option to do it either way and to understand how to architect Rails a bit better in the process. It seems like there should be a "render" option from within the cells framework to render to a certain controller or view, but it's not working like I expect and I don't know if I'm even in the ballpark. Thanks!

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  • PostgreSQL timezone does not match system timezone

    - by Martin C.
    I have several PostgreSQL 9.2 installations where the timezone used by PostgreSQL is GMT, despite the entire system being "Europe/Vienna". I double-checked that postgresql.conf does not contain timezone setting, so according to the documentation it should fallback to the system's timezone. However, # su -s /bin/bash postgres -c "psql mydb" mydb=# show timezone; TimeZone ---------- GMT (1 row) mydb=# select now(); now ------------------------------- 2013-11-12 08:14:21.697622+00 (1 row) Any hints, where the GMT timezone could come from? The system user does not have TZ set and the /etc/timezone and /etc/timeinfo seem to be configured correctly. # cat /etc/timezone Europe/Vienna # date Tue Nov 12 09:15:42 CET 2013 Any hints are appreciated, thanks in advance!

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  • PostgreSQL didn't install on Ubuntu 11.04

    - by peanut
    On a new copy of Ubuntu 11.04 server I am trying to install PostgreSQL server by apt-get install postgresql. But in the end of installation log I saw: Error: could not create default cluster. Please create it manually with pg_createcluster 8.4 main --start When I ran this command I saw this message: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US:en", LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). Error: The locale requested by the environment is invalid. And no PostgreSQL server started :( What I need to do to become happy on this?

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  • PostgreSQL won't start anymore

    - by Sander Declerck
    Today, my PostgreSQL doesn't start anymore on my windows machine... I've tried to start the service in windows services and got the following error: Windows could not start the PostgreSQL Database Server 8.3 service on Local Computer. Error 1053: The service did not respond to the start or control request in a timely fashion. Then I went to the command line to manually start C:/Program Files (x86)/PostgreSQL/8.3/bin/psql.exe, and then I got this error: psql: Could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "???" and accepting TCP/IP connections on port 5432? Edit: I found this in the logs: 2011-04-22 13:13:16 CEST LOG: could not receive data from client: No connection could be made because the target machine actively refused it. 2011-04-22 13:13:16 CEST LOG: unexpected EOF on client connection

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  • Postgresql by network

    - by sev
    I have running PostgreSQL sever on 192.168.0.102:5432. postgresql.conf has this line: listen_addresses = '*' and pg_hba.conf has this one: host all all 127.0.0.1/32 trust I have Rails app with same config/database.yml development: adapter: postgresql host: 192.168.0.102 port: 5432 encoding: unicode database: test pool: 5 username: test password: But when I run rake db:migrate I get (I run this from 192.168.0.100) FATAL: no pg_hba.conf entry for host "192.168.0.100", user "test", database "postgres", SSL on FATAL: no pg_hba.conf entry for host "192.168.0.100", user "test", database "postgres", SSL off ... Who can help with this?

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  • ASP.NET, PostgreSQL, Mono, Ubuntu, Apache: Good idea?

    - by wreck_of_u
    I am a long-time Microsoft .NET developer. ASP.NET/MSSQL/IIS has been my bread & butter over the past 6 years. Now, I'm getting fond of the "lightweightness" of Ubuntu 10.xx server. I'm also loving SSH-ing it from my Windows 7 PC and installing apps using the awesome "apt-get" command. I've also been using HeidiSQL with MySQL now and loving it. It feels like Management Studio. However, i've read that PostgreSQL "may" be better than MySQL, and I did experience some MySQL overloads in my Moodle box (but this can be just a poor tweaking in my part). My question is, would it be a good idea to run this configuration? ASP.NET 4.0 PostgreSQL (the latest one I can apt-get!) Ubuntu 10.10 with Mono running on Apache Also, I assume I would be using Npgsql for Mono as my connector from ASP.NET to PostgreSQL?

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  • VirtualBox Port Fowarding to Connect to PostgreSQL Database

    - by kliao
    I'm trying to connect to a PostgreSQL database hosted on a Win7 guest from a Win7 host. I've configured security in pg_hba.conf host all all 127.0.0.1/32 md5 host all all 10.0.2.15/32 md5 host all all 192.168.1.6/32 md5 and set the listen_addresses setting in postgresql.conf to '*'. I think I've set up port forwarding correctly as I see: Key: VBoxInternal/Devices/e1000/0/LUN#0/Config/win7_vm1/GuestPort, Value: 5432 Key: VBoxInternal/Devices/e1000/0/LUN#0/Config/win7_vm1/HostPort, Value: 5432 Key: VBoxInternal/Devices/e1000/0/LUN#0/Config/win7_vm1/Protocol, Value: TCP when I call getextradata. This is similar to http://serverfault.com/questions/106168/cant-connect-to-postgresql-on-virtualbox-guest but I'm not sure what I'm doing wrong. In the vbox.log file I see: 00:00:01.019 NAT: set redirect TCP host port 5432 = guest port 5432 @ 10.0.2.15 00:00:01.033 NAT: failed to redirect TCP 5432 = 5432 but I'm not sure how to fix that. Any ideas? Thanks.

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  • What is a practical way to debug Rails?

    - by Joshua Fox
    I get the impression that in practice, debuggers are rarely used for Rails applications. (Likewise for other Ruby apps, as well as Python.) We can compare this to the usual practice for Java or VisualStudio programmers--they use an interactive debugger in a graphical IDE. How do people debug Rails applications in practice? I am aware of the variety of debuggers, so no need to mention those, but do serious Rails programmers work without them? If so, why do you choose to do it this way? It seems to me that console printing has its limits when debugging complex logic.

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