I want to enable users to overwrite custom translations in the locales/YAML-files.
I use the i18n-active_record gem by Sven Fuchs which works great to use translations stored in the database.
The problem: Users should only get their own translations, not those of others.
So I added a user_id column to the translations table. Now I have no idea how to setup a scope for I18n::Backend::ActiveRecord.
My locale.rb (in config/initializers):
require 'i18n/backend/active_record'
I18n.backend = I18n::Backend::ActiveRecord.new
I18n::Backend::ActiveRecord.send(:include, I18n::Backend::Memoize)
I18n::Backend::ActiveRecord.send(:include, I18n::Backend::Flatten)
I18n::Backend::Simple.send(:include, I18n::Backend::Memoize)
I18n::Backend::Simple.send(:include, I18n::Backend::Pluralization)
I18n.backend = I18n::Backend::Chain.new(I18n.backend, I18n::Backend::Simple.new)
Thanks for any ideas!
try adding this to an initializer file
ie: added to where you initialize the activerecord backend for i18n
config/initializers/i18n_backend.rb
require 'i18n/backend/active_record'
if ActiveRecord::Base.connection.table_exists? 'translations'
require 'i18n/backend/active_record'
I18n.backend = I18n::Backend::Chain.
new(I18n::Backend::ActiveRecord.new, I18n.backend)
end
# OVERRIDING DEFAULT QUERY
module I18n
module Backend
class ActiveRecord
class Translation < ::ActiveRecord::Base
class << self
def locale(locale)
where(:locale => locale.to_s).where(:field => condition)
end
end
end
end
end
end
this should overrides the default locale method in the i18n-active_record gem
Related
I create a route for each product from database with following code:
Products.all.each do |product|
get "/#{product.title.latinize}"
end
end
class String
def latinize
self
end
end #or with helpers
which raises NoMethodError: undefined method `latinize' for "hello":String.
How to use helpers (or class's extensions as seen here) from dynamically generated routes in Sinatra?
It's probably because you are defining the latinize method after you are generating the routes. Move to above the Product.all section.
I have a subclassed ActiveRecord model which uses a separate table to store records and friendly_id (4.1.0.beta.1) to generate slugs. Problem is friendly_id is using the parent class's table to check for existing slugs, instead of using the child table. Basically I'd like friendly_id to scope its checks to the right table.
Example:
class Parent
friendly_id :name, :use => :slugged
end
class Child < Parent
self.table_name = 'children'
end
Parent.create(name: 'hello').slug
> 'hello'
Child.create(name: 'hello').slug
> 'hello--2'
I want friendly_id to generate the 'hello' slug for the second create, because there are no records in the children table with that slug. Is there a way to configure or monkey patch the class friendly id uses for its queries?
EDIT: added friendly_id version for future reference
I'm posting my own solution to this problem, just in case someone is having the same problem. I should reiterate that this problem was found on version 4.1.0.beta.1 of the friendly_id gem (which at the time was the most recent version), so this issue may not occur any more.
To solve this problem, I basically configured slug_generator_class to use my own class, so I could monkey patch the culprit method.
In my model:
friendly_id do |config|
config.slug_generator_class = SubclassScopableSlugGenerator
end
In an initializer, I overrode the FriendlyId::SlugGenerator.conflicts method so I could access the sluggable_class var:
# Lets a non-STI subclass of a FriendlyId parent (i.e. a subclass with its
# own dedicated table) have independent slug uniqueness.
class SubclassScopableSlugGenerator < FriendlyId::SlugGenerator
private
def conflicts
# this is the only line we're actually changing
sluggable_class = friendly_id_config.model_class
pkey = sluggable_class.primary_key
value = sluggable.send pkey
base = "#{column} = ? OR #{column} LIKE ?"
# Awful hack for SQLite3, which does not pick up '\' as the escape character without this.
base << "ESCAPE '\\'" if sluggable.connection.adapter_name =~ /sqlite/i
scope = sluggable_class.unscoped.where(base, normalized, wildcard)
scope = scope.where("#{pkey} <> ?", value) unless sluggable.new_record?
length_command = "LENGTH"
length_command = "LEN" if sluggable.connection.adapter_name =~ /sqlserver/i
scope = scope.order("#{length_command}(#{column}) DESC, #{column} DESC")
end
end
I'm working in a Sinatra application using Sequel.
I want to make a transaction, according to the manual I have to use the DB object, how can I get this object from any part of my code?
You can define it in your base app.rb (or equivalent) or include a separate file where you configure the DB object if you wish.
For example, in one of my Sinatra apps, I have an app.rb that includes a
class App < Sinatra::Application
#lots of stuff here...
end
require_relative 'models/init'
In my models/init.rb I configure DB
require 'sequel'
conf = YAML.load(File.open(File.expand_path('./config/dbconn.yml')))
env = ENV['RACK_ENV'] || 'development'
DB = Sequel.connect(host:conf['database'][env]['host'],
port:conf['database'][env]['port'],
database:conf['database'][env]['schema'],
username:conf['database'][env]['username'],
password:conf['database'][env]['password'],
adapter:conf['database'][env]['adapter'],
encoding:conf['database'][env]['encoding'])
raise "Unable to connect to #{conf['database'][env]['host']}" unless DB.test_connection
...
That's one way. Hope it helps.
You mention that you want to reference from any part of your code; however I've found that encapsulated within the models is where I tend to wrap transactions; and from there it's relatively easy:
class X < Sequel::Model
def self.y
self.db.transaction {
...
end
end
def z
db.transaction {
...
}
end
end
I'm trying to do some monkey patching in ActiveShipping UPS class .
I need to add a class level method (starting with .self), so here it's what I'm trying to do:
module ActiveMerchant
module Shipping
class UPS < Carrier
def self.process_request(receiver, sender, packages, options = {})
# some code
end
def regular_method
"foobar"
end
end
end
end
Unfortunately when I'm trying to use it:
ActiveMerchant::Shipping::UPS.process_request(receiver etc)
I get an error:
NoMethodError: undefined method `process_request' for ActiveMerchant::Shipping::UPS:Class
from (irb):6
from C:/Ruby19/bin/irb.bat:19:in `<main>'
There is no class method named process_request in original class.
In original UPS class provided in gem there is one static method defined self.retry_safe = true
and I can use it without errors.
I can also use regular_method after creating instance of UPS class.
More details provided:
I'm working with Rails 2.3 ( :-( ) and Ruby 1.9.2. I have no influce on environment.
Monkey patched code is under plugins/my_plugin/lib/active_shipping/ext/carriers/ups.rb
In /active_shipping I have file named extensions.rb in which i have:
require 'active_shipping'
require_relative 'ext/carriers'
require_relative 'ext/carriers/ups'
It deals with loading everything properly (I suppose basing on regular_method beheaviour from first chunk of code in my question).
I try to invoke process_request in one of my Controllers. This part is little tricky, beacuse i'm using sth like this:
MyModel.courier_service.process_request(parameters)
where courier_service, in this case holds the ActiveMerchant::Shipping::UPS class.
I'm still a newbie in Ruby and don't know what sort of details i should provide.
Maybe you want to do it in another way
File patch_classes.rb:
module ActiveMerchantExpand
module Shipping
module ClassMethods
def self.process_request(receiver, sender, packages, options = {})
# some code
end
end
module InstanceMethods
def regular_method
"foobar"
end
end
def self.included(receiver)
receiver.extend ClassMethods
receiver.send :include, InstanceMethods
end
end
end
Then you have to load your class "ActiveMerchant::Shipping::UPS"
and after that you can attach your methods to your class via
Rails.configuration.to_prepare do
require_dependency [[file for ActiveMerchant::Shipping::UPS]]
require 'patch_classes' )
ActiveMerchant::Shipping::UPS.send(:include, ::ActiveMerchantExpand::Shipping)
end
This is from rails plugin writing, i hope this helps.
regards tingel2k
Do you explicitly require file with your monkey patch? If you just put it under your app or lib path without requiring, it wouldn't load because constant ActiveMerchant::Shipping::UPS is defined in gem and it doesn't trigger dependency resolution mechanism.
I have a class called User, that needs to include a module.
The class looks like this:
require 'sequel'
require 'modules/validations'
class User < Sequel(..)
many_to_one :country
includes ::Validations
validates_email(:email)
end
The module is defined in a subfolder called modules. It has been added to the $LOAD_PATH and Ruby is no complaining about the loading. The module looks like this:
module Validations
def validates_email(attr, options = {})
email = super.email
end
end
The error I am getting is :
undefined method 'validates_email' for User:class
What am I missing to make this work properly?
If you want to use modules to define class methods you should use the extends method.
class User < Sequel(..)
extend ::Validations
validates_email(:email)
...
end
I suggest reading this article: http://railstips.org/blog/archives/2009/05/15/include-vs-extend-in-ruby/