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  • NOTE: This style guide borrowed from rails guides. We’ll modify it later.

Prologue

Each guide should start with motivational text at the top, telling readers what they’ll learn. ( Example – Routing Guide )

Generic Remarks

Communicate to the reader what’s the current way of doing things. Both explicit and implicitly. Use the recommended idioms in edge (which is the version we are documenting), reorder sections to emphasize favored approaches if needed, etc. The documentation should be a model for best practices and canonical, modern Rails usage.

Try to make your examples fit the boxes in the design, wrap comments, long method calls, just shorten stuff, etc. as needed.

The proper name of Rails components has spaces in between: “Active Record”. Please write them like that. There’s lack of unanimity in books, but we checked it with David.

Title Cases

Use title case for h2 and h3 titles:

  h2. Performance Testing Rails Applications
  h3. Performance Test Cases

and regular case for h4 and below:

  h4. Understanding the output
  h5. Wall time

Fonts

For the sake of coherence we follow in Rails Guides the same typographic conventions of the API documentation:

Fixed-width font for method names, literals like nil, false, true, self, symbols, and method parameters.

  Validations such as `validates_uniqueness_of` are one way in which models can
  enforce data integrity. The `:dependent` option on associations allows models to
  automatically destroy child objects when the parent is destroyed.

When “true” and “false” are English words rather than Ruby keywords use regular font for them:

  If you set the +:accessible+ option to true, then mass assignment is allowed
  for this association.

Fixed-width font as well for constants, in particular for class and module names.

  A migration is a subclass of +ActiveRecord::Migration+ that implements two class
  methods: +up+ (perform the required transformations) and +down+ (revert them).
  To get started make sure +Base.perform_caching+ is set to true for your
  environment.

Fixed-width font also for filenames:

  For example +20080906120000_create_products.rb+ should define +CreateProducts+ and
  +20080906120001_add_details_to_products.rb+ should define +AddDetailsToProducts+.

Textile

Guides are written in Textile. There’s comprehensive documentation here and a cheatsheet for markup here.

HTML Generation

To generate all the guides just cd into the railties directory and execute


  1. generates the HTML of all guides
    rake guides

To process my_guide.textile and nothing else use the ONLY environment variable:


  1. generates the HTML of “my_guide.textile”
    rake guides ONLY=my_guide

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