Pure git/github version of my scrapbook on Ruby on Rails, web-development, linux system configuration.
##########################################################################
## ##
## Check individual .md files above for more information on topics ##
## ##
##########################################################################
Archive:
# on VM
curl --upload-file /tmp/export.csv https://transfer.sh/
# https://transfer.sh/123456/export.csv
# on Laptop
wget https://transfer.sh/123456/export.csv
# bin/importmap pin local-time
time_tag post.created_at, 'data-local': 'time-ago'
rails g resource comment post:reference content:text
form.text_area :content, size: '20x5'
<div id="<%= dom_id @post %>" >
</div>
<% if quote.errors.any? %>
<%= @model.errors.full_messages.to_sentence.capitalize %>
<% end %>
# `app` is variable and `ENV` a constant loaded when you start rails console
a = Rails.application.config.session_store.new(app, Rails.application.config.session_options)
a.class # => ActionDispatch::Session::RedisStore
a.get_session(ENV, '07319b2485be9ac4850664cd47cede38') # you can find session id inspecting
# your cookis via firefox or plugin
# or a.find_session(ENV, '07319b2485be9ac4850664cd47cede38')
rvm docs generate
to lunch ri Array
require 'net/http'
require 'cgi'
class Cowsays
def say(message)
message = CGI.escape(message)
Net::HTTP.get_print(URI.parse(http://www.cowsays.com/cowsay?message=#{message}))
end
end
source: ruby tapas 30
Rails.application.eager_load!
ActiveRecord::Base.descendants
class Foo
include Rails.application.routes.url_helpers
# ... or you can Delegate methods it
def home_macro
h.link_to 'Home', root_path
end
private
def h
ActionController::Base.helpers
end
end
note you can do include UrlHelper
which includes link_to
but this will work only for String based urls as this module was changed in Rails 4 ( check source code )
if you keep getting error arguments passed to url_for can't be handled ...
your only chance is to use my former code
Rails 5, Rails 6, Rails 7
ActiveRecord::Type::Boolean.new.cast "f"
in Rails 4.2
ActiveRecord::Type::Boolean.new.type_cast_from_database(value)
in Rails 3.2 and down
ActiveRecord::ConnectionAdapters::Column.value_to_boolean 'f' # => false
ActiveRecord::ConnectionAdapters::Column.value_to_boolean 't' # => true
ActiveRecord::ConnectionAdapters::Column.value_to_boolean '0' # => false
ActiveRecord::ConnectionAdapters::Column.value_to_boolean '1' # => true
ActiveRecord::ConnectionAdapters::Column.value_to_boolean nil # => false
...works the same the only difference is that when nil
is passed it
returns nil
and "y"
, "n"
will give you deprication warning
https://gist.github.com/equivalent/3825916
Tell browser not to cache content that hold harmfull data (e.g.: user settings, card details..>)
<meta http-equiv="Cache-control" content="no-cache no-store">
def memstats
`ps -o size= #{$$}`.strip.to_i
end
source: ruby tapas 42
tail -f log/production.log | grep "NoMethodError"
"2010-10-25 23:48:46 UTC".to_time.iso8601