Use Model.created_at.strftime(“%FT%T”) where, %F – The ISO 8601 date format (%Y-%m-%d) %T – 24-hour time (%H:%M:%S) Following are some of the frequently used useful list of Date and Time formats that you could specify in strftime method: Date (Year, Month, Day): %Y – Year with century (can be negative, 4 digits at least) -0001, 0000, … Read more
You may actually need to install both of these packages sudo apt-get install libxslt-dev libxml2-dev
You can do something like: object.attribute = value object.save(:validate => false)
Look at your gem environment. In a terminal run gem env You should see an entry INSTALLATION DIRECTORY, but there is also GEM PATHS which is where it’s loading all your gems from in your current environment.
Here are all the Rails3 (ActiveRecord migration) datatypes: :binary :boolean :date :datetime :decimal :float :integer :primary_key :references :string :text :time :timestamp Source
I have decided to compile this answer because all others seem to be incomplete. config.active_record.default_timezone determines whether to use Time.local (if set to :local) or Time.utc (if set to :utc) when pulling dates and times from the database. The default is :utc. http://guides.rubyonrails.org/configuring.html If you want to change Rails timezone, but continue to have Active … Read more
As odd as it sound when you want to permit nested attributes you do specify the attributes of nested object within an array. In your case it would be Update as suggested by @RafaelOliveira params.require(:measurement) .permit(:name, :groundtruth => [:type, :coordinates => []]) On the other hand if you want nested of multiple objects then you … Read more
I’m guessing you’re unaware of the Hash#except method ActiveSupport adds to Hash. It would allow your code to be simplified to: redirect_to my_path(params.except(:controller, :action, :other_key)) Also, you wouldn’t have to monkey patch, since the Rails team did it for you!
Use update_column (Rails >= v3.1) or update_columns (Rails >= 4.0) to skip callbacks and validations. Also with these methods, updated_at is not updated. #Rails >= v3.1 only @person.update_column(:some_attribute, ‘value’) #Rails >= v4.0 only @person.update_columns(attributes) http://api.rubyonrails.org/classes/ActiveRecord/Persistence.html#method-i-update_column #2: Skipping callbacks that also works while creating an object class Person < ActiveRecord::Base attr_accessor :skip_some_callbacks before_validation :do_something after_validation :do_something_else … Read more
Rails 4.1 added Hash#compact and Hash#compact! as a core extensions to Ruby’s Hash class. You can use them like this: hash = { a: true, b: false, c: nil } hash.compact # => { a: true, b: false } hash # => { a: true, b: false, c: nil } hash.compact! # => { a: … Read more