fields with false booleans and empty strings seem to cause extra DB hits #4
Description
When rendering show for a record the log reveals that, as expected, the controller is hitting the DB with a request for all fields but then, under certain circumstances, the view erb is generating extra requests for individual fields. For example, for a user who hasn't filled in a motto, and who is not an admin, we get:
Processing UserController#show HBASE SELECT (attribute:name, attribute:motto, attribute:is_admin) Rendering template within layouts/application Rendering users/show HBASE SELECT (attribute:motto) HBASE SELECT (attribute:is_admin)
I used the console to try and figure out what was going on. I found that when a record is requested (with default = all fields) only some of the fields are actually populated in the returned object e.g.:
>> user = User.find(:first) => #< User attribute:name: "jon" >
Subsequent calls to the fields that weren't returned adds them:
>> user.motto => nil >> user => #< User attribute:name: "jon", attribute:motto: nil > >> user.is_admin => false >> user => #< User attribute:name: "jon", attribute:motto: nil, attribute:is_admin: false >
I'm not sure if this is expected behaviour or not. Is the DB really being hit multiple times or is that just the way it's reported in the logs? I'm a bit confused!