ruby-on-rails Archives - Page 5 of 19

Programming, ruby-on-rails

IT Nursery

Rails has_many with alias name

In my User model I could have: has_many :tasks and in my Task model: belongs_to :user Then, supposing the foreign key ‘user_id’ was ...

May 28, 2022
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Programming, ruby-on-rails

IT Nursery

How to use RSpec’s should_raise with any kind of exception?

I’d like to do something like this: some_method.should_raise <any kind of exception, I don't care> How should I do this? some_method.should_raise exception … ...

May 28, 2022
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Programming, ruby-on-rails

IT Nursery

Want to find records with no associated records in Rails

Consider a simple association… class Person has_many :friends end class Friend belongs_to :person end What is the cleanest way to get all persons ...

May 28, 2022
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Programming, ruby-on-rails

IT Nursery

How to change a nullable column to not nullable in a Rails migration?

I created a date column in a previous migration and set it to be nullable. Now I want to change it to be ...

May 28, 2022
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Programming, ruby-on-rails

IT Nursery

How to rollback just one step using rake db:migrate

After adding migration files in the db/migrate folder and running rake db:migrate, I want get back to the previous step, I think using ...

May 28, 2022
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Programming, ruby-on-rails

IT Nursery

What do helper and helper_method do?

helper_method is straightforward: it makes some or all of the controller’s methods available to the view. What is helper? Is it the other ...

May 28, 2022
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Programming, ruby-on-rails

IT Nursery

Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]

I have been googling for about 90 minutes now and still don’t have an answer to this. Where do I set default_url_options? I’ve ...

May 27, 2022
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Programming, ruby-on-rails

IT Nursery

How to pass arguments into a Rake task with environment in Rails? [duplicate]

This question already has answers here: How to pass command line arguments to a rake task (20 answers) Closed 4 years ago. I ...

May 27, 2022
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Programming, ruby-on-rails

IT Nursery

Ruby/Rails: converting a Date to a UNIX timestamp

How would I get a UNIX timestamp (number of seconds since 1970 GMT) from a Date object in a Rails app? I know ...

May 27, 2022
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Programming, ruby-on-rails

IT Nursery

Ruby on Rails – Import Data from a CSV file

I would like to import data from a CSV file into an existing database table. I do not want to save the CSV ...

May 27, 2022
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