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我需要按与传递坐标的距离排序来搜索位置。

应用程序/索引/location_index.rb

ThinkingSphinx::Index.define :location, :with => :active_record do
  indexes :name
  has latitude, longitude
end

尝试搜索:

> Location.search(:geo => [53.348962, 83.777988], :order => "@geodist DESC").size
ThinkingSphinx::SyntaxError: sphinxql: syntax error, unexpected USERVAR, expecting IDENT (or 5 other tokens) near '@geodist DESC LIMIT 0, 20; SHOW META'

> Location.search(:geo => [53.348962, 83.777988],:with => {"@geodist" => 0.0..5000.0}, :order => "@geodist DESC").size
ThinkingSphinx::SphinxError: sphinxql: only >=, <=, and BETWEEN floating-point filter types are supported in this version near '@geodist BETWEEN 0.0 AND 5000.0 AND sphinx_deleted = 0 ORDER BY @geodist DESC LIMIT 0, 20; SHOW META'
  • Sphinx 2.0.6 版本(r3473;2012 年 10 月 22 日)
  • 思考狮身人面像 (3.0.1)

更新:

Pat Allan 建议: Geodist 不再需要 @ 符号 - 所以请尝试以下操作:

Location.search(:geo => [53.348962, 83.777988], :order => "geodist DESC").size
Location.search(:geo => [53.348962, 83.777988],:with => {:geodist => 0.0..5000.0}, :order => "geodist DESC").size
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1 回答 1

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以防万一人们发现这个问题认为我会以正确的格式添加答案并进行更多解释。

2.1.1 之前的 Sphinx 版本通过 @geodist 内部变量提供了计算距离。在与新版本的 Sphinx 兼容的 Thinking Sphinx 版本中,GEODIST() 的值已被别名为 geodist。

所以这:

Location.search(:geo => [53.348962, 83.777988], :order => "@geodist DESC").size

变成:

Location.search(:geo => [53.348962, 83.777988], :order => "geodist DESC").size

在此示例中还值得指出的是,上述示例中提供的坐标格式不正确。它们是度数而不是弧度: http: //pat.github.io/thinking-sphinx/geosearching.html。要转换它们,您可以执行以下操作:

def degrees_to_radians(degrees)
  degrees * Math::PI / 180
end

希望有帮助!

于 2014-06-28T07:52:33.193 回答