On 25 Mar 2011, at 18:34, Taylor Strait <li...@ruby-forum.com> wrote:
> I have a highly-normalized user model called Respondent. It has many
> join fields such as "ethnicity_id", "education_id", etc. that define
> relational categories. Most of them are indexed. For reasons unknown,
> Rails is hitting a huge number of the tables when accessing any
> Respondent objects. For example, on a simple SHOW action:
>
Looks to me that it's because of some of your validations, that seem to be
validating that (eg) ethnicity_id is in the list of all ethnicities etc.
Fred
> ==CONTROLLER== (from basic scaffold)
> def show
> @respondent = Respondent.find(params[:id])
>
> respond_to do |format|
> format.html # show.html.erb
> format.xml { render :xml => @respondent }
> end
> end
>
> ==VIEW== (note - nothing is even being rendered!)
> <p id="notice"><%= notice %></p>
>
> <%= link_to 'Edit', edit_respondent_path(@respondent) %> |
> <%= link_to 'Back', respondents_path %>
>
> ==RESULTING SERVER LOG==
> Started GET "/respondents" for 127.0.0.1 at 2011-03-25 14:12:50 -0400
> Processing by RespondentsController#index as HTML
> Geokit is using the domain: localhost
> ←[1m←[35mPostalCode Load (101.0ms)←[0m SELECT `postal_codes`.* FROM
> `postal_codes`
> ←[1m←[36mCountry Load (1.0ms)←[0m ←[1mSELECT `countries`.* FROM
> `countries`←[0m
> ←[1m←[35mEthnicity Load (1.0ms)←[0m SELECT `ethnicities`.* FROM
> `ethnicities`
> ←[1m←[36mEducation Load (0.0ms)←[0m ←[1mSELECT `educations`.* FROM
> `educations`←[0m
> ←[1m←[35mJobStatus Load (0.0ms)←[0m SELECT `job_statuses`.* FROM
> `job_statuses`
> ←[1m←[36mRespondent Load (0.0ms)←[0m ←[1mSELECT `respondents`.* FROM
> `respondents`←[0m
> Rendered layouts/_navigation.html.erb (1.0ms)
> Rendered respondents/index.html.erb within layouts/application (190.0ms)
> Completed 200 OK in 3809ms (Views: 205.0ms | ActiveRecord: 103.0ms)
>
> ==QUESTION==
> Why in the world could the server need to hit these tables and why is it
> taking so long? Some of these models are related -- for example,
> postal_code BELONGS_TO country, etc. It does not do this for any other
> models. I have attached the model and migration file for reference since
> they are so long.
>
> Attachments:
> http://www.ruby-forum.com/attachment/6083/respondent.rb
> http://www.ruby-forum.com/attachment/6084/20110226202511_create_respondents.rb
>
>
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