Tag Archives: Gems

sqlite3.h is missing – Ruby on Rails

Just an error I ran into while running bundle install on a new ubuntu virtual:

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb 
checking for sqlite3.h... no
sqlite3.h is missing. Try 'port install sqlite3 +universal'
or 'yum install sqlite-devel' and check your shared library search path (the
location where your sqlite3 shared library is located).
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.
Provided configuration options:

To fix it, simply run the following:

sudo apt-get install libsqlite3-dev

Not Recognised by the ‘identify’ command – Paperclip

Just a quick post on another problem I ran into while setting up PaperClip. When attempting to submit a form WITHOUT an image I received the following error message:

Assets asset /tmp/stream20120218-22611-dgnkr-0.exe is not recognized by the 'identify' command.

Apparently the most common cause of this issue is one of two things:

#1: You don’t have RMagick installed
The easiest fix for this is to simply install the rmagick gem. Simply add rmagick to your Gemfile and run bundle install. Restart your server and you should be ready to go.

#2: Your command_path isn’t set correctly
Run the following command from your console:

chris@chris-VirtualBox:~/site$ which identify

Then add the path that is returned to your environment settings:

Paperclip.options[:command_path] = "/usr/bin"

#3: If all else fails

If none of the above seem to be causing your issue, try adding the following to your model:

 def asset?
    !(asset_content_type =~ /^image.*/).nil?

This will simply prevent the file being processed if it’s not an image, avoiding the issue all together. Hopefully this’ll help someone out, let me know if you come across any other solutions.

Apparently a more recent cause of this issue is an update to the cocaine gem, rolling back to version 0.3.2 appears to resolve the issue. Thanks to Ahmed and Fabrice for bringing it to my attention:

PaperClip Issues – Ruby on Rails

I finally decided to replace all my existing code to handle images with Paperclip. I was following the screencast by Emerson Lackey, #134 Paperclip, however I ran into a couple of issues. Thankfully they were all very easily fixed, and probably wouldn’t have occurred at all if I’d simply watched the whole screencast instead of trying to rush on ahead.

Issue #1:
The first issue I encountered was that my asset fields weren’t appearing on the page:

<% f.fields_for :assets do |asset_fields|   %>
      <% if asset_fields.object.new_record? %>
          <%= asset_fields.file_field :asset %>
      <% end %>
    <% end %>

I spent way too much time trying to work this one out, especially considering how obvious the solution is – the screencast is simply missing an “=” after the initial “<%" in "<% f.fields_for". Simply amend it as follows:

<%= f.fields_for :assets do |asset_fields|   %>
      <% if asset_fields.object.new_record? %>
          <%= asset_fields.file_field :asset %>
      <% end %>
    <% end %>

Issue #2:
The second one is actually encountered and addressed by Emerson himself. Unfortunately I started trying to find a solution before seeing his, so just in case someone else does a Google search I’ll include the issue here:

undefined method `symbolize_keys!' for "/system/assets/1/original/mack_truck.jpg?1329550205":String

     <% f.fields_for :assets do |asset_fields| %>
       <% unless asset_fields.object.new_record? %>

<%= link_to image_tag(asset_fields.object.asset.url(:thumb), asset_fields.object.asset.url(:original)) %>

<% end %> <% end %>

The problem here is simply that the parenthesis are in the wrong place, simply amend your code as follows:

     <% f.fields_for :assets do |asset_fields| %>
       <% unless asset_fields.object.new_record? %>
         <%= link_to image_tag(asset_fields.object.asset.url(:thumb)), asset_fields.object.asset.url(:original) %>
       <% end %>
     <% end %>

Anyway, hopefully this helps someone else out – let me know if there are any issues.

Update: Don’t name your model assets!
Unfortunately I followed the tutorials naming example and called my model Asset. While this may have been fine in earlier version of rails it causes quirky conflicts with the asset pipeline. I strongly encourage you to use a different name i.e. Uploads

PostgreSQL Installation Error – Ruby

I ran into a bit of problem moving an app to a test Heroku host – I needed to install PostgreSQL. I added the following to my Gemfile:

#gem 'sqlite3'
gem 'pg'

I then tried to run bundle install:

root@chris-VirtualBox:~/site# bundle install

However I received the following error:

root@chris-VirtualBox:~/site# bundle install

Fetching source index for http://rubygems.org/
Using rake (0.9.2) 
Using multi_json (1.0.3) 
Using activesupport (3.1.1) 
Using builder (3.0.0) 
Using i18n (0.6.0) 
Using activemodel (3.1.1) 
Using erubis (2.7.0) 
Using rack (1.3.4) 
Using rack-cache (1.1) 
Using rack-mount (0.8.3) 
Using rack-test (0.6.1) 
Using hike (1.2.1) 
Using tilt (1.3.3) 
Using sprockets (2.0.2) 
Using actionpack (3.1.1) 
Using mime-types (1.16) 
Using polyglot (0.3.2) 
Using treetop (1.4.10) 
Using mail (2.3.0) 
Using actionmailer (3.1.1) 
Using arel (2.2.1) 
Using tzinfo (0.3.30) 
Using activerecord (3.1.1) 
Using activeresource (3.1.1) 
Using bundler (1.0.21) 
Using rack-ssl (1.3.2) 
Using json (1.6.1) 
Using rdoc (3.10) 
Using thor (0.14.6) 
Using railties (3.1.1) 
Using rails (3.1.1) 
Using acts-as-taggable-on (2.1.1) 
Using awesome_nested_set (2.0.2) 
Using bcrypt-ruby (3.0.1) 
Using carrierwave (0.5.7) 
Using cocaine (0.2.0) 
Using coffee-script-source (1.1.2) 
Using execjs (1.2.9) 
Using coffee-script (2.2.0) 
Using coffee-rails (3.1.1) 
Using orm_adapter (0.0.5) 
Using warden (1.0.6) 
Using devise (1.4.8) 
Using escape (0.0.4) 
Using geocoder (1.0.5) from git://github.com/alexreisner/geocoder.git (at no_grouping) 
Using jquery-rails (1.0.16) 
Using libv8 ( 
Using nokogiri (1.5.0) 
Using paperclip (2.4.5) 
Installing pg (0.12.2) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.8 extconf.rb 
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/pg-0.12.2 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/pg-0.12.2/ext/gem_make.out
An error occured while installing pg (0.12.2), and Bundler cannot continue.
Make sure that `gem install pg -v '0.12.2'` succeeds before bundling.

It turned out that because I was on Ubuntu I needed to install the libpq-dev package:

root@chris-VirtualBox:~/site# apt-get install libpq-dev

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-2.6.38-8 linux-headers-2.6.38-8-generic
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  comerr-dev krb5-multidev libgssapi-krb5-2 libgssrpc4 libk5crypto3
  libkadm5clnt-mit7 libkadm5srv-mit7 libkdb5-4 libkrb5-3 libkrb5-dev
  libkrb5support0 libpq5 libssl-dev
Suggested packages:
  krb5-doc krb5-user postgresql-doc-8.4
The following NEW packages will be installed:
  comerr-dev krb5-multidev libgssrpc4 libkadm5clnt-mit7 libkadm5srv-mit7
  libkdb5-4 libkrb5-dev libpq-dev libpq5 libssl-dev
The following packages will be upgraded:
  libgssapi-krb5-2 libk5crypto3 libkrb5-3 libkrb5support0
4 upgraded, 10 newly installed, 0 to remove and 106 not upgraded.
Need to get 3,142 kB of archives.
After this operation, 8,520 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libk5crypto3 i386 1.8.3+dfsg-5ubuntu2.2 [76.7 kB]
Get:2 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libgssapi-krb5-2 i386 1.8.3+dfsg-5ubuntu2.2 [100 kB]
Get:3 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libkrb5-3 i386 1.8.3+dfsg-5ubuntu2.2 [327 kB]
Get:4 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libkrb5support0 i386 1.8.3+dfsg-5ubuntu2.2 [22.2 kB]
Get:5 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libgssrpc4 i386 1.8.3+dfsg-5ubuntu2.2 [54.6 kB]
Get:6 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libkadm5clnt-mit7 i386 1.8.3+dfsg-5ubuntu2.2 [38.7 kB]
Get:7 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libkdb5-4 i386 1.8.3+dfsg-5ubuntu2.2 [38.1 kB]
Get:8 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libkadm5srv-mit7 i386 1.8.3+dfsg-5ubuntu2.2 [51.6 kB]
Get:9 http://au.archive.ubuntu.com/ubuntu/ natty/main comerr-dev i386 2.1-1.41.14-1ubuntu3 [41.5 kB]
Get:10 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main krb5-multidev i386 1.8.3+dfsg-5ubuntu2.2 [82.5 kB]
Get:11 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libpq5 i386 8.4.10-0ubuntu0.11.04.1 [81.6 kB]
Get:12 http://au.archive.ubuntu.com/ubuntu/ natty/main libssl-dev i386 0.9.8o-5ubuntu1 [2,019 kB]
Get:13 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libkrb5-dev i386 1.8.3+dfsg-5ubuntu2.2 [15.0 kB]
Get:14 http://au.archive.ubuntu.com/ubuntu/ natty-updates/main libpq-dev i386 8.4.10-0ubuntu0.11.04.1 [193 kB]
Fetched 3,142 kB in 6s (506 kB/s)                                              
(Reading database ... 167506 files and directories currently installed.)
Preparing to replace libk5crypto3 1.8.3+dfsg-5ubuntu2.1 (using .../libk5crypto3_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Unpacking replacement libk5crypto3 ...
Preparing to replace libgssapi-krb5-2 1.8.3+dfsg-5ubuntu2.1 (using .../libgssapi-krb5-2_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Unpacking replacement libgssapi-krb5-2 ...
Preparing to replace libkrb5-3 1.8.3+dfsg-5ubuntu2.1 (using .../libkrb5-3_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Unpacking replacement libkrb5-3 ...
Preparing to replace libkrb5support0 1.8.3+dfsg-5ubuntu2.1 (using .../libkrb5support0_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Unpacking replacement libkrb5support0 ...
Selecting previously deselected package libgssrpc4.
Unpacking libgssrpc4 (from .../libgssrpc4_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Selecting previously deselected package libkadm5clnt-mit7.
Unpacking libkadm5clnt-mit7 (from .../libkadm5clnt-mit7_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Selecting previously deselected package libkdb5-4.
Unpacking libkdb5-4 (from .../libkdb5-4_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Selecting previously deselected package libkadm5srv-mit7.
Unpacking libkadm5srv-mit7 (from .../libkadm5srv-mit7_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Selecting previously deselected package comerr-dev.
Unpacking comerr-dev (from .../comerr-dev_2.1-1.41.14-1ubuntu3_i386.deb) ...
Selecting previously deselected package krb5-multidev.
Unpacking krb5-multidev (from .../krb5-multidev_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Selecting previously deselected package libpq5.
Unpacking libpq5 (from .../libpq5_8.4.10-0ubuntu0.11.04.1_i386.deb) ...
Selecting previously deselected package libssl-dev.
Unpacking libssl-dev (from .../libssl-dev_0.9.8o-5ubuntu1_i386.deb) ...
Selecting previously deselected package libkrb5-dev.
Unpacking libkrb5-dev (from .../libkrb5-dev_1.8.3+dfsg-5ubuntu2.2_i386.deb) ...
Selecting previously deselected package libpq-dev.
Unpacking libpq-dev (from .../libpq-dev_8.4.10-0ubuntu0.11.04.1_i386.deb) ...
Processing triggers for man-db ...
Processing triggers for doc-base ...
Processing 1 added doc-base file(s)...
Registering documents with scrollkeeper...
Processing triggers for install-info ...
Setting up libkrb5support0 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libk5crypto3 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libkrb5-3 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libgssapi-krb5-2 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libgssrpc4 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libkadm5clnt-mit7 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libkdb5-4 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libkadm5srv-mit7 (1.8.3+dfsg-5ubuntu2.2) ...
Setting up comerr-dev (2.1-1.41.14-1ubuntu3) ...
Setting up krb5-multidev (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libpq5 (8.4.10-0ubuntu0.11.04.1) ...
Setting up libssl-dev (0.9.8o-5ubuntu1) ...
Setting up libkrb5-dev (1.8.3+dfsg-5ubuntu2.2) ...
Setting up libpq-dev (8.4.10-0ubuntu0.11.04.1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place

And then just run bundle install again:

root@chris-VirtualBox:~/site# bundle install

There’s some documentation on the gems wiki page: https://bitbucket.org/ged/ruby-pg/wiki/Home

Uninstalling a Gem – Ruby on Rails

Due to a few recent issues with SunSpot (see my previous posts), I’ve decided to uninstall it until I have enough time to work on it properly. Once again, Ruby makes this pretty simple:

chris@chris-VirtualBox:~/site$ sudo gem uninstall sunspot
[sudo] password for chris: 
You have requested to uninstall the gem: sunspot-1.2.1 sunspot_rails-1.2.1 depends on [sunspot (= 1.2.1)]
If you remove this gems, one or more dependencies will not be met.
Continue with Uninstall? [Yn]  y
Remove executables: sunspot-solr, sunspot-installer in addition to the gem? [Yn]  y
Removing sunspot-solr
Removing sunspot-installer
Successfully uninstalled sunspot-1.2.1