Ruby on Rails Study Notes

Reference books: Agile web development with rails 4th Edition

Create a new website and create some default directories and files:

$ Rails new <projectname>

Start the server and run the following command in the project directory:

$ Rails Server

Default website address: http: // localhost: 3000/

Generate controller for two pages

$ Rails generate controller controllername page1 page2

In the. html. ERB fileCodeIt is Ruby.

@ Variable: Variable

The link can be linked in standard HTML.

<A href = "/say/Hello"> Hello </a>

However, if the file location changes in the future, the URL may become invalid. The rails solution should be used:

<% = Link_to "goodbye", say_goodbye_path %>

Config/routes. RB: configure the ing between the browser path and the file. For example, you can access http: // localhost: 3000/and use root to use a file as the default file.

Root: To => 'store # Index',: As => 'store'

: String is the symbol, saving memory than the string, because the symbol is saved only once.

Ruby's special foreach expression. The brackets are actually blocks. | contains local variables representing each member:

Array. Each {| localvariable | print localvariable}

Rubyonrails, learning notes