Rails is misinterpreting model name

Rails
1

I have two models

class Ferm < AR::Base
has_many :daily_analyses
end

class DailyAnalysis < AR::Base
belongs_to :ferm
end

$ script/console
Loading development environment (Rails 2.0.2)

f = Ferm.find(:first)
=> #<Ferm … >

f.daily_analyses
NameError: uninitialized constant Ferm::DailyAnalyAsis
from /Library/Ruby/Gems/1.8/gems/activesupport-2.0.2/lib/
active_support/dependencies.rb:478:in const_missing' from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/ base.rb:1750:incompute_type’
from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/
reflection.rb:125:in send' from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/ reflection.rb:125:inklass’
from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/
associations/has_many_association.rb:152:in construct_sql' from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/ associations/has_many_association.rb:6:ininitialize’
from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/
associations.rb:1032:in new' from /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/ associations.rb:1032:indaily_analyses’
from (irb):3

For some reason Rails is converting “daily_analyses” to
“daily_analy_asis”. Using the pluralizer and tableizer for
“daily_analysis” correctly give “daily_analysis”.

Should I roll back my schema and rename the table something other than
“daily_analysis?”

Thanks --SH

2

Hmmm, that’s weird.
After successfully reproducing your problem, I added the following to
config/initializers/inflections.rb

Inflector.inflections do |inflect|
inflect.singular ‘daily_analyses’, ‘daily_analysis’
end

Now, in the console:

“daily_analyses”.singularize # returns “daily_analysis”
“daily_analyses”.classify #returns DailyAnalysis

But calling the association on Ferm still yields an error.

:open_mouth:

Giuseppe

shenry wrote:

I have two models

class Ferm < AR::Base
has_many :daily_analyses
end

class DailyAnalysis < AR::Base
belongs_to :ferm
end

$ script/console
Loading development environment (Rails 2.0.2)

f = Ferm.find(:first)
=> #<Ferm … >

f.daily_analyses
NameError: uninitialized constant Ferm::DailyAnalyAsis

3

You can avoid inflection hassles entirely and just explicitly tell it
which class to use:

class Ferm < AR::Base
has_many :daily_analyses, :class_name => “DailyAnalysis”
end

class DailyAnalysis < AR::Base
belongs_to :ferm
end

4

Giuseppe B. wrote:

Hmmm, that’s weird.
After successfully reproducing your problem, I added the following to
config/initializers/inflections.rb

Inflector.inflections do |inflect|
inflect.singular ‘daily_analyses’, ‘daily_analysis’
end

Shouldn’t that be

inflect.singular 'analyses', 'analysis'

?

5

with :

Inflector.inflections do |inflect|
inflect.irregular ‘daily_analysis’, ‘daily_analyses’
end

I get …

“daily_analyses”.classify
=> “DailyAnalysis”

ferm.daily_analyses
=> NameError: uninitialized constant Ferm::DailyAnalyAsis (…etc…)

“daily_analyses”.camelize
=>“DailyAnalyses” # shouldn’t this camelize to ‘DailyAnalysis’?

“daily_analyses”.camelize.classify
=>“DailyAnalyAsis”

it seems like when rails is putting together the Ferm::DailyAnalysis
relationship it first camelizes “daily_analyses” into “DailyAnalyses”
then classifies it incorrectly as “DailyAnalyAsis”.

I think I’ll just change my table name to something like “daily”.

SH

6

@Philp,

I tried your suggestion, same result as the other things I tried.

@Max,

Works great, very simple solution. Thanks,

SH

7

shenry wrote:

Inflector.inflections do |inflect|
inflect.irregular ‘daily_analysis’, ‘daily_analyses’
end

That inflects too much.

Did anyone try my suggestion?

inflect.irregular ‘analysis’, ‘analyses’

It would be the same for ‘daily_crisis’ to ‘daily_crises’. (-: