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データベースに新しいエントリを保存しようとすると問題が発生します。送信時に、プロジェクトはプロジェクトテーブルに保存され、そのプロジェクト内のテクノロジー/テクノロジーはTechnolsと呼ばれるテクノロジーテーブルに保存され、それらの間の関係はProjecttechnolsと呼ばれるテーブルに保存されます。

これが私の新しいアクションです：

def new
    @project = Project.new
    @technol = Technol.new(params[:tech])

@all_technols = Technol.all
tech_ids = params[:technols][:id].reject(&:blank?) unless params[:technols].nil?


@project_technol = @project.projecttechnols.build





#@project_technol = Projecttechnol.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @project }
    end
  end

アクションを作成します。

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

@technol = Technol.new(params[:tech])




params[:technol].each_value do |tech|

technology = Technol.find_by_tech(tech.strip)

@project_technol = @project.projecttechnols.build(:technol_id => technology.id)

end


    @project.client = params[:new_client] unless params[:new_client].blank?
    @project.project_owner = params[:new_project_owner] unless params[:new_project_owner].blank?
    @project.tech = params[:new_tech] unless params[:new_tech].blank?
    @project.role = params[:new_role] unless params[:new_role].blank?
    @project.industry = params[:new_industry] unless params[:new_industry].blank?
    @project.business_div = params[:new_business_div] unless params[:new_business_div].blank?

    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

そして私の3つのモデル：

Project.rb

class Project < ActiveRecord::Base
  attr_accessible  :edited_first_name, :edited_last_name, :first_name, :last_name, :business_div, :client, :customer_benifits, :edited_date, :end_date, :entry_date,  :financials, :industry, :keywords, :lessons_learned, :project_name, :project_owner, :role, :start_date, :status, :summary, :tech , :technols

validates_presence_of :business_div, :client, :customer_benifits, :end_date,  :financials, :industry, :keywords, :lessons_learned, :project_name, :project_owner, :role, :start_date, :status, :summary




has_many :projecttechnols
has_many :technols, :through => :projecttechnols


def self.like(text); "%#{text}%"; end

  def self.search(search_client, search_industry, search_role, search_techs_ids, search_business_div, search_project_owner,  search_status, search_start_date_dd, search_start_date_A, search_start_date_B,  search_keywords)
    # start with a scoped query, to apply more scopes on it afterwards
    _projects = Project.scoped 
    # then, for each of the parameters, apply the scope only if present
    if search_client.present?
      _projects = _projects.where ['client LIKE ?', like(search_client)] 
    end
    if search_industry.present?
      _projects = _projects.where ['industry LIKE ?', like(search_industry)]
    end
    if search_role.present?
      _projects = _projects.where ['role LIKE ?', like(search_role)]
    end

#_projects = _projects.joins(:technols).
 #             where("technols.id" => search_techs_ids)



#_projects = _projects.joins(:projecttechnols).where("projecttechnols.id" => search_techs_ids)


if search_techs_ids.present?
_projects = _projects.joins(:technols).where("technols.id" => search_techs_ids)
end



    if search_business_div.present?
      _projects = _projects.where ['business_div LIKE ?', like(search_business_div)]
    end
    if search_project_owner.present?
      _projects = _projects.where ['project_owner LIKE ?', like(search_project_owner)]
    end

     if search_status.present?
      _projects = _projects.where ['status LIKE ?', like(search_status)]
    end



todays_date = DateTime.now.to_date

if !search_start_date_A.blank? or !search_start_date_B.blank?
    search_start_date_A = Date.parse(search_start_date_A).strftime("%Y-%m-%d")
    search_start_date_B = Date.parse(search_start_date_B).strftime("%Y-%m-%d")
    todays_date = nil
    search_start_date_dd = nil

    end

if search_start_date_dd.blank?
    todays_date = nil
end


if search_start_date_A.present? or search_start_date_B.present?

      _projects = _projects.where [' DATE(start_date) BETWEEN ? AND ?', search_start_date_A, search_start_date_B]
    end


                if search_start_date_dd.present?
      _projects = _projects.where ['DATE(start_date) BETWEEN ? AND ?', search_start_date_dd, todays_date]
    end




    if search_keywords.present?
      _projects = _projects.where ['keywords LIKE ?', like(search_keywords)]
    end
    # now you have applied only the present scopes. return the result, and watch 
    # the query as it executes.
    _projects
  end


def self.paginated_for_index(projects_per_page, current_page)
    paginate(:per_page => projects_per_page, :page => current_page)
  end

end

technol.rb

class Technol < ActiveRecord::Base
  attr_accessible :tech

has_many :projecttechnols
has_many :projects, :through => :projecttechnols
end

projecttechnol.rb

class Projecttechnol < ActiveRecord::Base
  attr_accessible :project_id, :technol_id

belongs_to :technol
belongs_to :project
end

これが新しいビューの一部であり、問​​題を引き起こしていると思います。

<div class="tech">

<% common_techs = [['Mainframe'],['UNIX'],['Windows Servers'],['Networking'],['CISCO'], ['Win7'], ['Telephony'], ['Web services'], ['Website'], ['Cloud'], ['Virtualisation'], ['Data Centre']] %>
 <% db_techs = Technol.all.map {|p| [p.tech]}.uniq %>

<% all_tech = common_techs + db_techs %>


<%= form_for(@technol) do |tech| %>
<div class="field">
    <%= tech.label :tech %><br />
    <%= tech.text_field :tech %>
  </div>
<%end%>

[送信]ボタンをクリックして新しいプロジェクトを作成すると、次のエラーが発生します。

    RuntimeError in ProjectsController#create

Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id

app/controllers/projects_controller.rb:116:in `block in create'
app/controllers/projects_controller.rb:112:in `each_value'
app/controllers/projects_controller.rb:112:in `create'

これらは私のパラメータです：

    {"utf8"=>"✓",
 "authenticity_token"=>"sPyJbgBKTxa9iHWF9r0Gg/0R/v0l0/e8KwXpPebzdus=",
 "project"=>{"project_name"=>"",
 "status"=>"Active",
 "client"=>"",
 "business_div"=>"",
 "project_owner"=>"",
 "start_date"=>"01-10-2012",
 "entry_date"=>"2012-10-03",
 "end_date"=>"09-10-2012",
 "role"=>"",
 "industry"=>"",
 "summary"=>"",
 "lessons_learned"=>"",
 "customer_benifits"=>"",
 "financials"=>"",
 "keywords"=>""},
 "new_client"=>"",
 "new_business_div"=>"",
 "new_project_owner"=>"",
 "technol"=>{"tech"=>"TESTER"},
 "new_role"=>"",
 "new_industry"=>"",
 "commit"=>"Save New Project"}

私はレールに慣れていないので、私を助けようとするときはこれを覚えておいてください。すべての助けをいただければ幸いです。前もって感謝します。

アップデート：

作業コード

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

@technol = Technol.new(params[:tech])




params[:technol].each_value do |tech|

technology = Technol.find_or_create_by_tech(tech.strip)

@project_technol = @project.projecttechnols.build(:technol_id => technology.id)

end
4

1 に答える 1

2

すべてをふるいにかけるのは少し難しいですが、このメッセージが表示されるたびに：

Called id for nil, which would mistakenly be ...

これは、正しくロードされていないオブジェクトに対してメソッド（この場合は.id）を呼び出そうとしたことを意味します。これがここでの作成アクションに含まれると推測する必要がある場合：

technology = Technol.find_by_tech(tech.strip)
  @project_technol = @project.projecttechnols.build(:technol_id => technology.id)
end

具体的にはtechnology.id。この行は確かですか：

technology = Technol.find_by_tech(tech.strip)

意図した結果を返していますか？に置き換えるとTechnol.firstエラーは止まりますか？もしそうならfind_by_tech失敗です。

于 2012-10-03T15:43:46.640 に答える