HABTM forms problem. Select form tag

rubyonrails-talk
1

Hi, I am a bit of a rails novice and trying to work this out. Been tearing my hair out over this for a long time.

I have 2 models that I am working on at the moment. The idea is that Teams have many players and Players have many teams. I want to be able to assign a starting team to a player when they are created.

class Team < ActiveRecord::Base   has_and_belongs_to_many :players

class Player < ActiveRecord::Base   has_and_belongs_to_many :teams

*Note: I have set up the correct join table and can insert these relationships from the ruby console. *

At the moment I have this in my view:

<%= select(:player_id, :teams, Team.all.collect{|s| [s.name, s.id]}) %>

It collects all the team names however when I hit submit nothing is sent. Am I missing out something?

Thank you. I have spent ages trying to sort this out.

2

Do you mean f.select( :player ...) rather than just select? Assuming you are inside a form_for that is.

Colin

3

Hi, thanks for your reply.

I am indeed that a form_for. When I put an f. infrount i get an error.

undefined method `merge' for [["1st Team", 1], ["2nd Team", 2]]:Array

Just to confirm. Without the f. the form loads however no Team data gets sent to the Params on the create. Sorry that is a bit vauge and probably the wrong way of saying it!

4

I have made some progress.

<%= select(:player, :team, Team.all.collect{|s| [s.name, s.id]}) %>

However I now get an error when I submit the form. One that is gettting closer!

undefined method `each' for "2":String

AND THIS IS THE PARAMETERS

“player”=>{“first_name”=>“test”, “last_name”=>“2”, “email”=>“eamiltest@test.com”, “teams”=>“2”}, “commit”=>“create player”}

5 
<%= collection_select(:player, :team, Team.all, :id, :name, :prompt => true) %>

i think it will work for u.assume you have form_for
6

O had to put :teams not :team but this works,

However when I hit create it comes back with a new error undefined method `each’ for “2”:String

7

ok u just write <%= f.collection_select(:player, Team.all, :id, :name, :prompt => true) %> it will store team id in ur player attrbutes

8

This does not work.

Using your code from before: <%= collection_select(:players, :teams, Team.all, :id, :name, :prompt => true) %>

The form now submits however:

NO DATA IS SAVED IN THE JOIN TABLE IN THE HABTM RELATIONSHIP.

9

WELL YOU HAVE SOMETHING WRONG IN YOUR CONTROLLER CODE THEN. Have look at the Rails Guide on debugging to find out how to debug the code.

Colin