Class Ferret::Search::TypedRangeFilter
In: ext/r_search.c
Parent: cFilter

Summary

TypedRangeFilter filters a set of documents which contain a lexicographical range of terms (ie "aaa", "aab", "aac", etc), unless the range boundaries happen to be numbers (positive, negative, integer, float), in which case a numerical filter is applied. See also TypedRangeQuery

Example

Find all products that cost less than or equal to $50.00.

  filter = TypedRangeFilter.new(:created_on, :<= => "50.00")

Methods

new  

Public Class methods

Create a new TypedRangeFilter on field field. There are two ways to build a range filter. With the old-style options; +:lower+, +:upper+, +:include_lower+ and +:include_upper+ or the new style options; +:<+, +:<=+, +:>+ and +:>=+. The options’ names should speak for themselves. In the old-style options, limits are inclusive by default.

Examples

  f = TypedRangeFilter.new(:date, :lower => "0.1", :include_lower => false)
  # is equivalent to
  f = TypedRangeFilter.new(:date, :< => "0.1")
  # is equivalent to
  f = TypedRangeFilter.new(:date, :lower_exclusive => "0.1")

  # Note that you numbers can be strings or actual numbers
  f = TypedRangeFilter.new(:date, :lower => "-132.2", :upper => -1.4)
  # is equivalent to
  f = TypedRangeFilter.new(:date, :>= => "-132.2", :<= => -1.4)

[Validate]