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value_of
2012 Jan 27
2
to_json performance
...d, like so:
class Hash
def self.transpose(keys, values)
self[*keys.zip(values).flatten]
end
end
keys = %W{token artist album genre release_year title duration
duration_in_seconds position play_count favorited disc_number}
my_hash = @playlist.media_files.ordered.values_of(*keys).collect{ |
v| Hash.transpose(keys, v) }
Nice, now we have a Array of Hash without instantiating AR objects but
with all the info we need about our objects.
This operation proved to be _extremely_ fast even if we are
transforming and inserting 50k records.
Now, on to the rendering:
ren...