Class: OrderQuery::Point

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

Overview

Search around a record in an order space

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(record, space) ⇒ Point

Returns a new instance of Point.

Parameters:



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# File 'lib/order_query/point.rb', line 12

def initialize(record, space)
  @record    = record
  @space     = space
  @where_sql = SQL::Where.new(self)
end

Instance Attribute Details

#record ⇒ Object (readonly)

Returns the value of attribute record.



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# File 'lib/order_query/point.rb', line 7

def record
  @record
end

#space ⇒ Object (readonly)

Returns the value of attribute space.



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# File 'lib/order_query/point.rb', line 7

def space
  @space
end

Instance Method Details

#after ⇒ ActiveRecord::Relation

Returns:

  • (ActiveRecord::Relation) 


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

def after
  side :after
end

#before ⇒ ActiveRecord::Relation

Returns:

  • (ActiveRecord::Relation) 


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# File 'lib/order_query/point.rb', line 40

def before
  side :before
end

#inspect ⇒ Object 



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# File 'lib/order_query/point.rb', line 64

def inspect
  "#<OrderQuery::Point @record=#{@record.inspect} @space=#{@space.inspect}>"
end

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

Returns:

  • (ActiveRecord::Base) 


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

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/point.rb', line 30

def position
  space.count - after.count
end

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

Returns:

  • (ActiveRecord::Base) 


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

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

#side(side) ⇒ ActiveRecord::Relation

Parameters:

  • side (:before, :after)

Returns:

  • (ActiveRecord::Relation) 


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

def side(side)
  query, query_args = @where_sql.build(side)
  scope = if side == :after
            space.scope
          else
            space.scope_reverse
          end
  if query.present?
    scope.where(query, *query_args)
  else
    scope
  end
end

#value(cond) ⇒ Object 



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# File 'lib/order_query/point.rb', line 60

def value(cond)
  record.send(cond.name)
end