Class: PostgresqlWeb::Paginator

Inherits:
Object
  • Object
show all
Defined in:
lib/postgresql_web/paginator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data, page, per_page, total_records) ⇒ Paginator

Returns a new instance of Paginator.



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# File 'lib/postgresql_web/paginator.rb', line 5

def initialize(data, page, per_page, total_records)
  @data = data
  @page = page.to_i
  @per_page = per_page.to_i
  @total_records = total_records.to_i
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/postgresql_web/paginator.rb', line 3

def data
  @data
end

#page ⇒ Object (readonly)

Returns the value of attribute page.



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# File 'lib/postgresql_web/paginator.rb', line 3

def page
  @page
end

#per_page ⇒ Object (readonly)

Returns the value of attribute per_page.



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# File 'lib/postgresql_web/paginator.rb', line 3

def per_page
  @per_page
end

#total_records ⇒ Object (readonly)

Returns the value of attribute total_records.



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# File 'lib/postgresql_web/paginator.rb', line 3

def total_records
  @total_records
end

Instance Method Details

#first_page? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/postgresql_web/paginator.rb', line 28

def first_page?
  page.to_i <= 1
end

#last_page? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/postgresql_web/paginator.rb', line 31

def last_page?
  page == total_pages
end

#offset ⇒ Object 



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# File 'lib/postgresql_web/paginator.rb', line 12

def offset
  if page > 0
    self.per_page * ( page - 1)
  else
    0
  end
end

#total_pages ⇒ Object 



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# File 'lib/postgresql_web/paginator.rb', line 20

def total_pages
  if self.total_records > 0
    (self.total_records.to_f / self.per_page).ceil 
  else
    1
  end
end