Trouble with the results of a dynamically generated find() method

Rails
1

Hi all,

So I have two tables:

  • apps (short for applicants)
    has_and_belongs_to_many :locations

  • locations
    has_and_belongs_to_many :apps

In my system, a user searches for applicants by the locations to which
they are associated, by using a dropdown menu that includes the names
of locations (and sends to the method that returns the results the id
of the selected location).

So, in the application for “joe,” joe has indicated that he wants to
live in “ethiopia” and “cambridge”. If I search for all apps
associated to “ethiopia,” joe DOES result. That’s good. But, in the
result, in joe’s row, only ethiopia appears. Where’s cambridge?

Here’s my find (which I’ve canned to look for ethiopia by it’s id of
41):
@apps = App.find(:all, :include => :locations, :conditions =>
[‘locations.id = ?’, 41])

Here’s the result, in script/console:
=> [#<App:0x368bcf0 @locations=[#<Location:0x3689f2c
@attributes={“status”=>“open”, “name”=>“Ethiopia”, “id”=>“41”}>],
@attributes={“prefix”=>“Mr”, “first_name”=>“joe”,
“last_name”=>“bloggs”}>]

So, my find is clearly limiting my result to show only the location
that was searched for in joe’s row. But I want to show joe’s row
complete with all his associations, including joe’s association to
cambridge. I just want to be able to search for joe by his
association to ‘ethiopia.’

Can anyone help me out?

Thanks,
Brad

2

brad wrote:

Here’s my find (which I’ve canned to look for ethiopia by it’s id of
41):
@apps = App.find(:all, :include => :locations, :conditions =>
[‘locations.id = ?’, 41])

Can anyone help me out?

Thanks,
Brad

@apps = App.find(:all, :include => :locations, :conditions =>
[‘locations.id in ?’, [41, 54].join(’,’)])

hth

ilan

3

you can pass “true” as an argument to your association to force it to
reload the values from the database.

For example:

App.find(:all, :conditions => [‘locations.name = ?’, ‘Ethiopia’],
:include => “locations”).each do |user|
puts “user: #{user.name} num locations #{user.locations(true).length}”
end

Mike