Rails has been good with automatically inserting correctly formatted datetimes in MySql without the need for me to give it much thought.
However, for doing a validation, I need to check if a stored mysql datetime value (ie 2008-07-02 18:00:00) is greater than or less than “now”. I can call DateTime.now or Time.now but how can I convert that into the format mysql likes?
Thanks
Answers:
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Method 1
You can use to_s(:db) to convert into a database friendly format.
Time.now.to_s(:db)
However, be careful if you have a timezone specified in Rails because the time will be stored in UTC in the database. You’ll need to specify that to do proper comparisons.
Time.now.utc.to_s(:db)
You can also use NOW() function in MySQL instead of generating the current time in Ruby.
Method 2
You don’t need to. Let Rails do the work for you:
If your model is Widget this will find all the widgets that have been created in the last day:
Thing.find(:all, :condition => ["created_at > ?", Time.now - 1.day])
Rails will automatically convert the timestamp into the correct format.
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0