Ruby on Rails: Form Error
===

I have a form which takes users information and stores it in the database. For some of the fields the user can put new information in a field, or select previous info from the database. It was working earlier, however I recently cleaned the database and now I get this error when I try to access the page.

undefined method `empty?' for nil:NilClass

Extracted source (around line #27):

27: <%= f.select( :client, Project.all.map {|p| [p.client]}.uniq!, :prompt => "Select a previous Client") %>



Form view example:

    <div class="field">
    <%= label_tag :new_client, "Client" %><br/>
    <%= text_field_tag :new_client %>
    Or
    <%= f.select( :client, Project.all.map {|p| [p.client]}.uniq!, :prompt => "Select a previous Client") %>
    </div>

Project Controller:

    def create
    @project = Project.new(params[:project])


	@project.client = params[:new_client] unless params[:new_client].empty?
	@project.exception_pm = params[:new_exception_pm] unless params[:new_exception_pm].empty?
	@project.project_owner = params[:new_project_owner] unless params[:new_project_owner].empty?
	@project.role = params[:new_role] unless params[:new_role].empty?
	@project.industry = params[:new_industry] unless params[:new_industry].empty?
	@project.business_div = params[:new_business_div] unless params[:new_business_div].empty?

    respond_to do |format|
      if @project.save
        format.html { redirect_to @project, notice: 'Project was successfully created.' }
        format.json { render json: @project, status: :created, location: @project }
      else
        format.html { render action: "new" }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
    end



Any help at all will be appreciated.

Thanks in advance!