Class: Ckeditor::Paginatable

Inherits:
Object
  • Object
show all
Defined in:
lib/ckeditor/paginatable.rb

Overview

Simple paginate relation

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(scope, options = {}) ⇒ Paginatable

Returns a new instance of Paginatable.



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# File 'lib/ckeditor/paginatable.rb', line 6

def initialize(scope, options = {})
  @scope = scope
  @limit_value = (options[:limit] || Ckeditor.default_per_page).to_i
end

Instance Attribute Details

#limit_value ⇒ Object (readonly)

Returns the value of attribute limit_value.



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# File 'lib/ckeditor/paginatable.rb', line 4

def limit_value
  @limit_value
end

#offset_value ⇒ Object (readonly)

Returns the value of attribute offset_value.



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# File 'lib/ckeditor/paginatable.rb', line 4

def offset_value
  @offset_value
end

Instance Method Details

#current_page ⇒ Object

Current page number



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# File 'lib/ckeditor/paginatable.rb', line 51

def current_page
  offset = (offset_value < 0 ? 0 : offset_value)
  (offset / limit_value) + 1
end

#first_page? ⇒ Boolean

First page of the collection?

Returns:

  • (Boolean) 


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# File 'lib/ckeditor/paginatable.rb', line 31

def first_page?
  current_page == 1
end

#last_page? ⇒ Boolean

Last page of the collection?

Returns:

  • (Boolean) 


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# File 'lib/ckeditor/paginatable.rb', line 36

def last_page?
  current_page >= total_pages
end

#next_page ⇒ Object

Next page number in the collection



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# File 'lib/ckeditor/paginatable.rb', line 21

def next_page
  current_page + 1 unless last_page?
end

#page(num = 1) ⇒ Object 



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# File 'lib/ckeditor/paginatable.rb', line 11

def page(num = 1)
  @offset_value = limit_value * ([num.to_i, 1].max - 1)
  self
end

#prev_page ⇒ Object

Previous page number in the collection



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# File 'lib/ckeditor/paginatable.rb', line 26

def prev_page
  current_page - 1 unless first_page?
end

#scoped ⇒ Object 



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# File 'lib/ckeditor/paginatable.rb', line 16

def scoped
  @scope.limit(limit_value).offset(offset_value)
end

#total_count ⇒ Object

total item numbers of scope



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# File 'lib/ckeditor/paginatable.rb', line 46

def total_count
  @total_count ||= @scope.count
end

#total_pages ⇒ Object

Total number of pages



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# File 'lib/ckeditor/paginatable.rb', line 41

def total_pages
  (total_count.to_f / limit_value).ceil
end