GridFS and Geospatial

佚名 6年前 (2019-04-25) 随笔 2129人围观抢沙发百度已收录

GridFS - specification for storing and retrieving large files... images,audio file, video files...

File system to store the chunks. Data is stored within MongoDB collections...

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Geospatial:

#2d sphere 
{type: 'point', coordinates: [40 ,5 ]}

#2d sphere index creation 

db[:zips].indexes.create_one({:loc=>Mongo::Index::GEO2DSPHERE})

#2d sphere queries 
db[:zips].find(:loc=> 
                   {:$near => { 
                     :$geometry=>{:type=>"Point", :coordinates=>[-76.625203, 39.29463]},
                      :$minDistance => 10000,
                      :$maxDistance => 50000

            }
        }).each { |r| pp r}