Class: OrderQuery::RelativeOrder

Inherits:
Object
  • Object
show all
Defined in:
lib/order_query/relative_order.rb

Overview

Search around a record in a scope

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(record, order_space) ⇒ RelativeOrder

Returns a new instance of RelativeOrder.

Parameters:



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# File 'lib/order_query/relative_order.rb', line 13

def initialize(record, order_space)
  @record = record
  @order  = order_space
  @query_builder = WhereBuilder.new record, order_space
end

Instance Attribute Details

#order ⇒ Object (readonly)

Returns the value of attribute order.



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# File 'lib/order_query/relative_order.rb', line 8

def order
  @order
end

#record ⇒ Object (readonly)

Returns the value of attribute record.



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# File 'lib/order_query/relative_order.rb', line 8

def record
  @record
end

Instance Method Details

#after ⇒ ActiveRecord::Relation

Returns:

  • (ActiveRecord::Relation) 


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# File 'lib/order_query/relative_order.rb', line 51

def after
  records :after
end

#before ⇒ ActiveRecord::Relation

Returns:

  • (ActiveRecord::Relation) 


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# File 'lib/order_query/relative_order.rb', line 56

def before
  records :before
end

#count ⇒ Integer

Returns:

  • (Integer) 


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# File 'lib/order_query/relative_order.rb', line 30

def count
  @total ||= scope.count
end

#first ⇒ ActiveRecord::Base

Returns:

  • (ActiveRecord::Base) 


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# File 'lib/order_query/relative_order.rb', line 20

def first
  scope.first
end

#last ⇒ ActiveRecord::Base

Returns:

  • (ActiveRecord::Base) 


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# File 'lib/order_query/relative_order.rb', line 25

def last
  reverse_scope.first
end

#next(loop = true) ⇒ ActiveRecord::Base

Returns:

  • (ActiveRecord::Base) 


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# File 'lib/order_query/relative_order.rb', line 41

def next(loop = true)
  unless_record_eq after.first || (first if loop)
end

#position ⇒ Integer

Returns:

  • (Integer) 


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# File 'lib/order_query/relative_order.rb', line 35

def position
  count - after.count
end

#previous(loop = true) ⇒ ActiveRecord::Base

Returns:

  • (ActiveRecord::Base) 


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# File 'lib/order_query/relative_order.rb', line 46

def previous(loop = true)
  unless_record_eq before.first || (last if loop)
end

#records(direction) ⇒ ActiveRecord::Relation

Parameters:

  • direction (:before, :after)

Returns:

  • (ActiveRecord::Relation) 


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# File 'lib/order_query/relative_order.rb', line 62

def records(direction)
  scope             = (direction == :after ? order.scope : order.reverse_scope)
  query, query_args = @query_builder.build_query(direction)
  if query.present?
    scope.where(query, *query_args)
  else
    scope
  end
end