Class: MongoidPagingToken::PagingToken

Inherits:
Object
  • Object
show all
Defined in:
lib/mongoid_paging_token/paging_token.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(criteria) ⇒ PagingToken

Returns a new instance of PagingToken.



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# File 'lib/mongoid_paging_token/paging_token.rb', line 5

def initialize(criteria)
  @criteria = criteria
end

Instance Attribute Details

#criteria ⇒ Object (readonly)

Returns the value of attribute criteria.



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# File 'lib/mongoid_paging_token/paging_token.rb', line 4

def criteria
  @criteria
end

Instance Method Details

#can_page? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mongoid_paging_token/paging_token.rb', line 21

def can_page?
  !!(sorts && limit) && limit > 0 && limit == entries.size
end

#next_page_criteria ⇒ Object 



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# File 'lib/mongoid_paging_token/paging_token.rb', line 9

def next_page_criteria
  if sorts.keys.size > 2
    raise NotImplementedError, 'paging not supported for more than two sorted fields'
  end
  
  if one_field_sort?
    one_field_sort_criteria
  else
    two_field_sort_criteria
  end
end

#to_s ⇒ Object 



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# File 'lib/mongoid_paging_token/paging_token.rb', line 25

def to_s
  return nil unless can_page?
  CGI.escape(Base64.encode64(Marshal.dump(next_page_criteria)))
end