Learning Rails for Django devs

1. Rails for Django Devs
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2. Why?
1. Polyglot-ism is good
2. Not a Django vs Rails tutorial
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3. Why?
1. Rails is an influential framework and many
libraries have been inspired by it. Eg Backbone.
2. Lot of great libraries and knowing rails would
help you port them rather than start from
scratch. Eg we built Django-Merchant after
looking through the API of active merchant.
3. Eg. South, Arel
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4. Good ideas to pick up from Rails
1. Asset Pipeline
2. Better way to write template tags
3. Simplified routing
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5. You say MTV, I say MVC
app_name/models.py app/models/models_
name.rb
app_name/views.py app/controllers/contro
ller_name.rb
templates/app_name/ app/views/view_nam
template.html e.erb
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6. Models
Authoritative Source
app_name/models.py
Database
models.py generate the SQL which is then
applied to DB
Migrations update the DB which is thenn used
to auto-generate schema.rb
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7. Relationships
models.ForeignKey belongs_to,
has_many
models. has_one
OneToOneField
models. has_and_belongs_t
ManyToManyField o_many
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8. Queryset etc
User.objects.create() User.create(..)
user.save() user.save!
Model.objects.get(id=10) Model.find(10)
Model.objects.filter(.. Model.where(..
conditions) conditions)
Model.objects.order_by Model.order
("created_at") ("created_at")
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9. Routing
urls.py config/routes.rb
Regex based DSL based
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10. Some More Mappings.
python manage.py runserver rails server
python manage.py shell rails console
python manage.py syncdb && python rake db:create && rake db:migrate
manage.py migrate
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11. Things not to learn from Rail
1. Too much autogenerated code
2. Django forms API is much cleaner
3. All models fields are nullable by default
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12. Resources
1. rubyonrails.org
2. guides.rubyonrails.org
3. ruby.railstutorial.org
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13. About Agiliq
Python Software consulting company. Small op
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