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Rails 4: f.select returns string not integer


In your create method, you should be able to quickly turn the :country param to an integer like so: @user = User.new(user_params.tap{ |u| u[:country] = u[:country].to_i })


Categories : Ruby On Rails

Related to : Rails 4: f.select returns string not integer
rails joins with select returns nil as id
You should use only option of to_json method: Foo.select('bars.comment_1, bars.comment_2, foos.rating').joins(:bars).each do |b| p b.to_json(only: [:comment_1, :comment_2, :rating]) end

Categories : Ruby On Rails
Select distinct returns duplicates
There are multiple columns in the select query, the query check for uniqueness across all the columns, not just the one in brackets. The SQL DISTINCT keyword is used in conjunction with SELECT statement to eliminate all the duplicate records and fetching only unique records.. Please note it not just columns If you modify your query to this: SELECT DISTINCT (TK.TICKETID), TK.DESCRIPTION, TK.CR

Categories : SQL
How to change string to integer
Prolog datatypes don't include 'strings'. SWI-prolog added it recently, but you can stay on ISO safety lane with number_codes

Categories : Prolog
How do I parse a hex-int from a string to an Integer?
There is actually a separate function where you can define the radix: https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html#parseInt(java.lang.String,%20int) Integer.parseInt(x) simply calls Integer.parseInt(x, 10) , so you have to specify a radix 10 number. In order to parse a hex string, you would simply have to use the following (note that the 0x prefix is not allowed): Integer.p

Categories : Java
MySQL rejects INSERT INTO if SELECT returns nothing
When you need a row -- even if there are no matches -- think aggregation. In your case: INSERT INTO `links` (`url`, `url_hash`, `parent_id`) SELECT $url, MD5($url), max(id) FROM (SELECT id FROM `links` WHERE `url` = $parentUrl LIMIT 1 ) t; This will generate one row. I'm not sure what "first" means in this context. This will be an arbitrary row.

Categories : Mysql
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