Ruby practice-will_paginate implement Paging

Development Environment:

OS: Windows XP

RUBY: ruby1.9.1

Rails: rails2.3.5

Will_paginate: will_paginate2.3.11

(Run the gem install mislav-will_paginate -- source http://gems.github.com in the command line)

IDE: rubymine2.0.1

DB: mysql5.0.9

 

This example uses the will_paginate plug-in to implement paging based on the previous example (Ruby practice-simple database operations ).

1. Install will_paginate

(Run the gem install mislav-will_paginate -- source http://gems.github.com in the command line)

 

Ii. Modify enviroment. Rb

Reference "will_paginate", in

Rails: initializer. Run do | config |

End

 

Then add require 'will _ paginate'. Otherwise, the error "method not found 'paginate'" will be reported during running '"

 

3. Modify product_controller.rb

The method for modifying the index is as follows:

Def index <br/> # @ products = product. all <br/> @ products = product. paginate: page => Params [: Page] | 1,: per_page => 2 <br/> respond_to do | format | <br/> format.html # index.html. ERB <br/> format. XML {render: XML =>@ products} <br/> end

# Note: 1 is the data displayed on page 3000 with http: // localhost: 1st/products; 2 is the number of records displayed on each page.

@ Product_pages = product. paginate: page => Params [: Page] | 1,: per_page => 2

 

Modify index.html. ERB

Add the following reference

<% = Will_paginate @ products,: prev_label => 'pre',: next_label => 'Next' %>

 

Running result: