rails won't save form field - ruby-on-rails

Question

I have a formfield in my form like this:
<div class="tags">
<%= f.label :tags %>
<%= f.text_area :tags %>
</div>
I ran a migration like this:
class AddTagsToIssues < ActiveRecord::Migration
def change
add_column :issues, :tags, :text
end
end
When i save, the new row is added to db, but tags = nil, although I typed something like 'test' in de text_area
in my development log I have:
Unpermitted parameters: tags
I have tried whitelisting in my controller:
def create
#issue = Issue.new(issue_params)
Issue.new(params.permit(:tags))
but this doesn't work.
Update for follow up question:
Full create method:
def create
def issue_params
params.require(:issue).permit(:tags)
end
#issue = Issue.new(issue_params)
Issue.new(params.permit(:tags))
respond_to do |format|
if #issue.save
format.html { redirect_to #issue, notice: 'Issue was successfully created.' }
format.json { render action: 'show', status: :created, location: #issue }
else
format.html { render action: 'new' }
format.json { render json: #issue.errors, status: :unprocessable_entity }
end
end
end
The model:
class Issue < ActiveRecord::Base
belongs_to :project
end
The table create query:
class CreateIssues < ActiveRecord::Migration
def change
create_table :issues do |t|
t.string :title
t.text :description
t.integer :no_followers
t.timestamps
end
end
end
So with this I don't have permission problems, that only happened with the later adding of the tags, and then only with the tags.

Answer 1

tags is being set as nil because you have not permitted it.
Permit tags in the issue_params method as below:
def issue_params
params.require(:issue).permit(:tags,...)
end
where, ... refers to other fields in model Issue.
Your create action should look something like this,
def create
#issue = Issue.new(issue_params) ## issue_params called
if #issue.save ## save the record
redirect_to #issue, notice: 'Issue was successfully created.'
else
render action: 'new'
end
end