Working on a project, I had to make some changes to the associations – where Product_Lines had many Products to Product_Lines has one Product. (The reason behind this is a whole other story.)
This is the error I got:
No association found for name `products’. Has it been defined yet?
I had changed the Product_Lines model to has_one Product. But, I had over looked the accepts_nested_attributes_for line. I changed :products to :product and it fixed it.
Andrew Development Ruby, Ruby on Rails
“** [out :: myserver] deploy is not in the sudoers file. This incident will be reported.” — Solution is here.
Read more…
Andrew Development Capistrano, LAMP, Linux, Rails, Ruby on Rails, Ubuntu
In order to get Git working in RubyMine, you’ll need to go into preferences and setup the path for the executable.
Preferences > VCSs > Git
Path to git executable: /usr/local/git/bin/git (for OSx)
Andrew Development git, OS X, Ruby, Ruby Mine, Ruby on Rails
The request was simple – how do you change the header (or title) for a validation message. Using nested resources, I ended up with a weird message:
3 errors prohibited this page[contact attributes] from being saved
Not very user friendly. So, I hit Google, blogs and IRC. So, here the solution I discovered.
<%= error_messages_for ‘c’, :header_message => “Please correct the errors below:”%>
Since this was part of a fields_for block, I had to add this to my controller method:
@c = @section.contact
Andrew Development Development, LAMP, Rails, Ruby, Ruby on Rails
So this:
sudo gem install -r libxml-ruby
Gives you this:
ERROR: Error installing libxml-ruby:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
checking for socket() in -lsocket… no
checking for gethostbyname() in -lnsl… yes
checking for atan() in -lm… no
checking for atan() in -lm… yes
checking for inflate() in -lz… yes
checking for iconv_open() in -liconv… no
checking for libiconv_open() in -liconv… no
checking for libiconv_open() in -llibiconv… no
checking for iconv_open() in -llibiconv… no
checking for iconv_open() in -lc… yes
checking for xmlParseDoc() in -lxml2… no
checking for xmlParseDoc() in -llibxml2… no
checking for xmlParseDoc() in -lxml2… no
*** 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:
–with-opt-dir
–without-opt-dir
–with-opt-include
–without-opt-include=${opt-dir}/include
–with-opt-lib
–without-opt-lib=${opt-dir}/lib
–with-make-prog
–without-make-prog
–srcdir=.
–curdir
–ruby=/usr/bin/ruby1.8
–with-iconv-dir
–without-iconv-dir
–with-iconv-include
–without-iconv-include=${iconv-dir}/include
–with-iconv-lib
–without-iconv-lib=${iconv-dir}/lib
–with-zlib-dir
–without-zlib-dir
–with-zlib-include
–without-zlib-include=${zlib-dir}/include
–with-zlib-lib
–without-zlib-lib=${zlib-dir}/lib
–with-socketlib
–without-socketlib
–with-nsllib
–without-nsllib
–with-mlib
–without-mlib
–with-mlib
–without-mlib
–with-zlib
–without-zlib
–with-iconvlib
–without-iconvlib
–with-iconvlib
–without-iconvlib
–with-libiconvlib
–without-libiconvlib
–with-libiconvlib
–without-libiconvlib
–with-clib
–without-clib
–with-xml2-config
–without-xml2-config
–with-xml2-dir
–without-xml2-dir
–with-xml2-include
–without-xml2-include=${xml2-dir}/include
–with-xml2-lib
–without-xml2-lib=${xml2-dir}/lib
–with-xml2lib
–without-xml2lib
–with-libxml2lib
–without-libxml2lib
–with-xml2lib
–without-xml2lib
extconf failure: need libxml2.
Install the library or try one of the following options to extconf.rb:
–with-xml2-config=/path/to/xml2-config
–with-xml2-dir=/path/to/libxml2
–with-xml2-lib=/path/to/libxml2/lib
–with-xml2-include=/path/to/libxml2/include
So, do this:
sudo apt-get install libxml2-dev
And this again:
sudo gem install -r libxml-ruby
Andrew Development Gems, LAMP, Open Source, Rails, Ruby, Ruby on Rails, Ubuntu
One of the frustrating things about Rails is coming up to speed with everyone else. A very simple task can be difficult, just because you haven’t done a particular task yet. Well, that’s ok. That’s what the community is for. So, I’m sharing those little things here.
This one is how to install will_paginate. Not so much how to install it – but how to add a new source to the gem sources.
gem sources
do you see http://gemcutter.org? if so, skip the next command
gem sources -a http://gemcutter.org
sudo gem install will_paginate
Andrew Development Development, LAMP, Linux, Open Source, Ruby, Ruby on Rails, Ubuntu
So, you’re on a VPS with 128MB of RAM or doing development on your Linux workstation and you don’t want MySQL to hog all of the memory — here is what you do:
sudo cp /etc/mysql/my.cnf /etc/mysql/my.cnf.backup
sudo cp /usr/share/doc/mysql-server-5.1/examples/my-small.cnf /etc/mysql/my.cnf
sudo /etc/init.d/mysql restart
** verify the version # on the second command line.
Andrew Development LAMP, Linux, mysql, Open Source, Ruby, Ruby on Rails, Server Admin, Ubuntu
I’m working on one of my first apps and I discover that the map.root :controller => does not work. I verified the controller was spelled correctly, but it kept taking me to the Ruby On Rails intro page.
Solution: delete the index.html out of /public/
Andrew Development LAMP, Open Source, Ruby, Ruby on Rails, Solution
Getting the following error message?
desktop:~# gem install sqlite3-ruby
Building native extensions. This could take a while…
ERROR: Error installing sqlite3-ruby:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
extconf.rb:1:in `require’: no such file to load — mkmf (LoadError)
from extconf.rb:1
Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.2.5 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.2.5/ext/sqlite3_api/gem_make.out
Solution: apt-get install ruby1.8-dev
Andrew Development Open Source, Ruby, Ruby on Rails
Ruby on Rails on Windows Vista :: Getting error “The application has failed to start because sqlite.dll was not found.”
Solution:
Copy sqllite3.dll to a directory that is in your %path% variable.
Andrew Ruby on Rails Rails, Ruby, Ruby on Rails, Solution, sqllite3
