May 13, 2015 by Daniel P. Clark

Rails: Don’t “pluck” Unnecessarily

Using pluck in Rails is both quick and efficient.  But there are cases where it’s not what you want to use.  For example if you’re selecting all users who have contacts, you might see something like this.

Rails’ where method allows for Arrays of items for lookup so the above code might turn into…

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May 9, 2015 by Daniel P. Clark

Chaining an Array into Arel ors

I’d like to keep this post short.  So the basic idea behind this is that Arel helps you build SQL queries.  When you want to join multiple queries together into one result you use Arel’s or method.  The way Arel chains additional query commands is by nesting inside the current query.  For example, if you…

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February 6, 2015 by Daniel P. Clark

Getting Into Rails Model Queries

For the longest time I was stubborn against learning “database programming”.  It was the abhorrent syntax that made me so resistant.  But low and behold there came Rails who found it in their heart to make a middle man ActiveRecord in which to slay the evil abhorrent syntax by resolving all good details in more…

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