i have two models that relate to each other as many-to-many.
class User
property :id, Serial
property :name, String
has n, :studygroups, :through => Resource
end
class Studygroup
property :id, Serial
property :name, String
has n, :users, :through => Resource
end
when i build a form for studygroup, it behaves as expected until i
submit it at which it complains that
undefined method `collection=' for ["id", "1"]:Array
i'm using a dropdown to choose a new user. that user should then be
appended to the studygroup.users collection when the post hits the
studygroup controller (i think).
the problem is in this piece of haml.
%td
approve new user
%select{:name => 'studygroup[users][id]'}
- @user.each do |user|
%option{:value => user.id}
= user.name
which renders this piece of html:
<td>
approve new user
<select name='studygroup[users][id]'>
<option value='1'>
guy smiley
</option>
</select>
</td>
i'm populating the form with data from @studygroup but i'm also making
the @user collection available so new users can be chosen.
maybe i'm abusing or mishandling update_attributes (i'm using the
update action without any modifications). my intuition is that it's
trying to work, but i'm not naming the form element correctly in first
place.
i would be grateful for help in understanding the basic strategies and
syntaxes to use for generic many-to-many gigs.
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