Read table row-by-row in ruby
I needed to export some data from a huge data table. Iterating through MyModel.find took too long and too much ram, so I went straight to the db instead.
Example code was tough to find, so here's an example:
sql = "select * from #{ MyModel.table_name }"
MyModel.connection.execute(sql) do |handle|
handle.fetch do |row|
# row is an array of values
... export row ...
end
end
Using Javascript Code for RJS Instead of IDs 3
Some info on how to make RJS output code like:
new Insertion.Bottom($$('p.welcome b').first(), "Some item"
