rubyXL | Ruby lib for reading/writing/modifying .xlsx and .xlsm files | Application Framework library
kandi X-RAY | rubyXL Summary
kandi X-RAY | rubyXL Summary
Ruby lib for reading/writing/modifying .xlsx and .xlsm files
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QUESTION
I need to be able to read the first (header) row in big xlsx file (350k x 12 cells, ~30MB) very fast in Ruby on Rails app. I am using Roo gem at the moment, which is fine for smaller files. But for files this big it takes 3-4 minutes. Is there a way to do this in seconds?
...ANSWER
Answered 2021-Dec-07 at 14:53Using #gets
could work, maybe something like:
QUESTION
I'm trying to revive an old Rails application I worked on several years ago. I'm using ruby 2.3.3 and rails 3.2.15 on the Heroku-16 stack with ClearDB for my MySQL database with the mysql2 adapter. When deploying to Heroku it succeeds on the deploy but crashes when it tries to start the app.
Full stack trace from the Heroku log (updated after fixing activerecord-import gem version per suggestion in first answer):
...ANSWER
Answered 2021-Feb-09 at 01:07Looks like you're running into compatibility issues trying to use the latest version of the activerecord-import gem at the time of writing (released in October 2020) with activerecord 3.2.22.5 (released in September 2016). You do mention it's a rails 3.2.15 app but you're not using activerecord 3.2.15 which is confusing.
Try using activerecord-import 0.4.1 (released in July 2013) and activerecord 3.2.15 which should be compatible with rails 3.2.15.
QUESTION
As I have known, there are some Ruby gems to read .xls and .xlsx files.
rubyXL: read .xlsx and .xlsm files
spreadsheet: read .xls file
Also know some gems to write an excel file.
axlsx: only write .xlsx file
But I couldn't find any gem to read both file types.
Does anyone know?
...ANSWER
Answered 2020-Jun-18 at 14:54QUESTION
Using RubyXL I want to know what row number my iteration is.
...ANSWER
Answered 2020-Jan-13 at 20:58You can use each_with_index
method while looping to get the current row number of the iteration
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