Question

New to rails….still trying to grasp all the “methods”

Table is called Histories.

   @compa = History.scoped(:limit => 10,:conditions => {:name => "IBM"}, :order => "closedate ASC")

Now I want to find if that @compa subset of the table contains an entry where the closedate = a specific date. I’ve tried all sorts of methods, but nothing seems to work.

Example:

if (@compa.has_value?(tmp))

Doesn’t work.

Should I work in the subset, or go back to the table and do a new scope? How can I work in the subset…I’m missing something I’m sure.

Answer 1

So you would want something like:

if(@compa.include?(tmp))

To see if @compa has the value, tmp.

However @compa contains attributes other than closedate. So you would want:

@compa.find{|o| o['closedate'] == tmp}

This will return nil if it doesn’t contain that value, otherwise it will return the object that does have closedate equal to tmp.

However why not use SQL to handle this:

Since @compa is an ActiveRecord Relation(because you called scoped), you can query it more by doing something like:

@compa.where(:closedate => tmp).exists?

Links:

Array#include

Enumerable#find

exists?