```ruby
class BuildsController < ApplicationController
  before_filter :load_project, :only => :show

  def show
    @build = @project.builds.find(params[:id])
  end

  def create
    make_build

    if @build
      head :ok, :location => project_build_url(@build.project, @build)
    else
      head :ok
    end
  end

  def request_build
    make_build
    if @build
      flash[:message] = "Build added!"
    else
      flash[:error] = "Error adding build!"
    end
    redirect_to project_path(params[:project_id])

  end

private
  def make_build
    if params['payload']
      @build = create_build_from_github
    elsif params['build']
      @build = create_developer_build
    end
  end

  def load_project
    @project = Project.find_by_name!(params[:project_id])
  end

  def create_build_from_github
    load_project
    payload = params['payload']

    requested_branch = payload['ref'].split('/').last

    if @project.branch == requested_branch
      @project.builds.create!(:state => :partitioning, :ref => payload['after'], :queue => :ci)
    end
  end

  def create_developer_build
    @project = Project.where(:name => params[:project_id]).first
    if !@project
      @project = Project.create!(:name => params[:project_id])
    end

    @project.builds.create!(:state => :partitioning, :ref => params[:build][:ref], :queue => :developer)
  end
end
```

Fix controller to check validity correctly
user
```ruby
class BuildsController < ApplicationController
  before_filter :load_project, :only => :show

  def show
    @build = @project.builds.find(params[:id])
  end

  def create
    build = make_build

    if build && build.save
      head :ok, :location => project_build_url(build.project, build)
    else
      head :ok
    end
  end

  def request_build
    if developer_build.save
      flash[:message] = "Build added!"
    else
      flash[:error] = "Error adding build!"
    end
    redirect_to project_path(params[:project_id])

  end

private
  def make_build
    if params['payload']
      build_from_github
    elsif params['build']
      developer_build
    end
  end

  def load_project
    @project = Project.find_by_name!(params[:project_id])
  end

  def build_from_github
    load_project
    payload = params['payload']

    requested_branch = payload['ref'].split('/').last

    if @project.branch == requested_branch
      @project.builds.build(:state => :partitioning, :ref => payload['after'], :queue => :ci)
    end
  end

  def developer_build
    @project = Project.where(:name => params[:project_id]).first
    if !@project
      @project = Project.create!(:name => params[:project_id])
    end

    @project.builds.build(:state => :partitioning, :ref => params[:build][:ref], :queue => :developer)
  end
end
```
assistant