Hey All,
Just another Australian web development blog I’ve come across, it’s not entirely about rails but definitely worth a look if you get the time:
Cameron Stitt – Just another Web Developer blog
Let me know what you think.
Hey All,
Just another Australian web development blog I’ve come across, it’s not entirely about rails but definitely worth a look if you get the time:
Cameron Stitt – Just another Web Developer blog
Let me know what you think.
Just a quick post on an error I ran into today while using hidden fields:
undefined method `merge' for 5:Fixnum 27:28: 'button' %> 29:30: 31: 32:
Thankfully this is an easy fix, simply amend your code as follows:
'button' %>@upload.product_id %>
And that’s all there is to it, let me know if there are any issues.
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 /usr/bin/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? end
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.
UPDATE:
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:
https://github.com/thoughtbot/paperclip/issues/1038
http://stackoverflow.com/a/12760881/522859
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:
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:
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
The problem here is simply that the parenthesis are in the wrong place, simply amend your code as follows:
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
I’ve recently switched from SQLite3 to PostGreSQL and came across the following error this morning:
my_app_development=> select category from codes; ERROR: column "category" does not exist LINE 1: select category from codes;
The following post solved the issues in one sentence:
http://archives.postgresql.org/pgsql-novice/2007-01/msg00032.php
Yes. In postgres, unquoted column and table names are converted to lower case.
The user also added that when using PostGreSql you should either be always, or never using quotes around column names.
My goal for today was to populate a record with all of the Australian postcodes and their corresponding suburb and state descriptions. To do this I had to complete the following:
Step #1: Download the .csv
I came across the following files after browsing a few of the Australian tech forums. I chose to use the Corra ones due to the claim that there are no license restrictions.
Once you’ve chosen your .csv, just save it in your project folder i.e. C:my_app
Step #2: Create a Model for your Locations
Secondly, you’ll need to create a new migration for your locations. I’ve simply called mine Code:
def change create_table :codes do |t| t.string "Pcode" t.string "Locality" t.string "State" t.string "Comments" t.string "DeliveryOffice" t.string "PresortIndicator" t.string "ParcelZone" t.string "BSPnumber" t.string "BSPname" t.string "Category" t.timestamps end end
Step #3: Create a Script to Import the .csv
The third step is to create a script that allows you to import the csv. This is made simple thanks to a comment left by “Gianluca” on the following blog post:
http://erikonrails.snowedin.net/?p=212
Simply create a new file within your tasks folder and add the following code:
#my_app/lib/tasks/import.rake require "csv" desc "Import CSV file into an Active Record table" task :csv_model_import, [:filename, :model] => :environment do |task,args| firstline=0 keys = {} CSV.foreach(args[:filename]) do |row| if (firstline==0) keys = row firstline=1 next end params = {} keys.each_with_index do |key,i| params[key] = row[i] end Module.const_get(args[:model]).create(params) end end
Step #4: Run the script in order to populate the database
To run the script simply run the following command:
chris@chris-VirtualBox:~/my_app$ rake csv_model_import[codes.csv,Code]
Step #5: Cleanse the data
Cleansing the data is a little tedious, however one tip is to remove all locations that do not have a category value of “Delivery Area”.
Ahwell, that’s all I’ve got for now – let me know if you have any trouble.