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Cursored fetching
When resolving the query, all the models are stored in memory before being processed.
This behavior can overload the memory in case of large dataset of models. To prevent this, clear offers the methods
each_with_cursors
and fetch_with_cursors
:User.query.each_with_cursor do |usr|
#...
end
The block retrieved on each call can be tweaked using
batch
optional parameter (default: 1000 models retrieved per call) :User.query.each_with_cursor(100) do |usr|
#...
end
Last modified 4yr ago