rails object expected got string

Question

I have seen multiple questions similar to this, but none worked for me. I have a team model: ``` class Team < ActiveRecord::Base has_one :p1, :class_name => "Player", :foreign_key => 'player_id', :validate => true has_one :p2, :class_name => "Player", :foreign_key => 'player_id', :validate => true end ``` in my team's _form.html.erb, I am referring to players as ``` <%= f.collection_select :p1, Player.all, :id, :name %> ``` However, on form submission, I see the error: ``` Player(#28401456) expected, got String(#14111904) Application Trace | Framework Trace | Full Trace app/controllers/teams_controller.rb:47:in `new' ``` ``` Parameters: {"utf8"=>"✓", "authenticity_token"=>"GSIcEvROFnvgGWT4HvE2VNqRw4NxU1J8iAw/WhZeRLk=", "team"=>{"p1"=>"1"}, "commit"=>"Create Team"} ``` And here is the code at line ``` def create @team = Team.new(params[:team]) ..... end ``` Any ideas please?

Accepted Answer

Finally, this worked:

```
 <%= f.collection_select :p1_id, Player.all, :id, :name %>
```

Here is the magic: My migration has t.references p1 and that created a column of p1_id in the database. When The form is submitted, rails is looking to fill in the id of the reference at:

```
def create
  @team = Team.new(params[:team])
  .....
end
```

rails object expected got string

Solution

Problem