问题
I am trying to assign a group of players to a fixture though a form.
I have been trying to list all the players from my players table via checkboxes so the user can select which players he wants for the fixture.
Models There are 3 models concedered with the fixtures and players
class Fixture < ActiveRecord::Base
belongs_to :team
has_many :player_fixtures
has_many :players, :through => :player_fixtures
has_one :venue
class Player < ActiveRecord::Base
has_and_belongs_to_many :teams
has_many :player_fixtures
has_many :fixtures, :through => :player_fixtures
class PlayerFixture < ActiveRecord::Base
belongs_to :player
belongs_to :fixture
I need to use a :through as with the association of the players and fixtures. I need a boolean whether that person has paid.
The associations of these work, and I can assign a player to a fixture in the join table though the console.
Views In my view I have:
<%= form_for(:fixture, :url => {:action =>'create'}) do |f| %>
This is the code I have been trying to get to work at the moment!
<%= f.collection_select(:player, :player_id, @players,:id, :name, { :include_blank => true ,:multiple => true}) %>
EDIT
I have now inserted the comment below and also changed the collection select to:
<%= f.collection_select(:player_ids, Player.all,:id, :name, {:include_blank => true ,:multiple => true}) %>
At the moment I get the following error on trying to load the form:
undefined method `merge' for :name:Symbol
on this line
28: <td><%= f.collection_select(:fixture, :player_id, Player.all,:id, :name, { :include_blank => true ,:multiple => true}) %>
This is probably horribly wrong, however I really need to get this working as this is a large part of my project.
Could anyone point me in the right direction? If someone wants to send along the formtastic route, feel free, as I can not get that work either.
回答1:
You should pass object to the form_for instead of symbol:
<%=form_for(:fixture, :url => {:action =>'create'}) do |f| %>
should be
<%= form_for(@fixture, :url => {:action =>'create'}) do |f| %>
Update:
Look like you did not define has_many :player_fixtures in the Fixture model, has_many :through required it first.
class Fixture < ActiveRecord::Base
belongs_to :team
has_many :player_fixtures
has_many :players, :through => :player_fixtures
has_one :venue
来源：https://stackoverflow.com/questions/9897126/habtm-form-not-submitting-more-than-one-value-in-rails