使用嵌套屬性和has_one：through關係的「未經許可的參數」

我正在使用Papercrop gem裁剪縮略圖圖像。它可以在我的用戶控制器上的其他地方正常工作，但是我試圖用has_one：through關係進行裁剪，並且嵌套窗體不會彈球。使用嵌套屬性和has_one：through關係的「未經許可的參數」

一些示例參數：

Parameters: {"utf8"=>"✓", "authenticity_token"=>"t3BsHf6nxAhM9zcRUJfy3nMoLVQAJF/KLbWwqrxeYuk=", "project"=>{"uploaded_image_original_w"=>"960.0", "uploaded_image_original_h"=>"640.0", "uploaded_image_box_w"=>"500", "uploaded_image_crop_x"=>"330", "uploaded_image_crop_y"=>"0", "uploaded_image_crop_w"=>"607", "uploaded_image_crop_h"=>"607", "uploaded_image_aspect"=>"1.0"}, "commit"=>"Save", "profile_name"=>"Benji", "id"=>"1"}

而且隨之而來的錯誤：

class Project < ActiveRecord::Base 
    belongs_to :user 

    has_one :thumbnail, :dependent => :destroy 
    has_one :image, through: :thumbnail 
    accepts_nested_attributes_for :image 
end

projects_controller.rb（該image_attribute attr_accessors被做

Unpermitted parameters: uploaded_image_original_w, uploaded_image_original_h, uploaded_image_box_w, uploaded_image_crop_x, uploaded_image_crop_y, uploaded_image_crop_w, uploaded_image_crop_h, uploaded_image_aspect

Project.rb The Papercrop gem）

def crop_params 
    params.require(:project).permit(image_attributes: [:uploaded_image_original_w, :uploaded_image_original_h, 
                :uploaded_image_box_w, :uploaded_image_crop_x, 
                :uploaded_image_crop_y, :uploaded_image_crop_w, 
                :uploaded_image_crop_h, :uploaded_image_aspect]) 
end

爲什麼它不允許這些屬性？

編輯：

添加fields_for周圍改變了我的錯誤，現在唯一不允許的參數是「圖像」

<%= form_for(@project.thumbnail.image, :as => :project,:url => project_thumbnail_path(@user, @project)) do |f| %> 
    <%= f.fields_for :image, @project.thumbnail.image do |pf| %> 
     <%= pf.cropbox :uploaded_image, :width => 500 %> 
    <%= pf.crop_preview :uploaded_image, :width => 150 %> 
    <%= pf.submit 'Save' %> 
    <% end %> 
<% end %>

來源

2014-04-04 BeamJinn

看你的參數，可以你不及格image_attributes:作爲PARAM：

"project"=>{"uploaded_image_original_w"=>"960.0", "uploaded_image_original_h"=>"640.0", "uploaded_image_box_w"=>"500", "uploaded_image_crop_x"=>"330", "uploaded_image_crop_y"=>"0", "uploaded_image_crop_w"=>"607", "uploaded_image_crop_h"=>"607", "uploaded_image_aspect"=>"1.0"}

您可能沒有在您的視圖中設置f.fields_for（並且只是按照原樣使用元素）。你有你的表單代碼嗎？

若要獲得上述PARAMS工作，你需要這些strong_params：

params.require(:project).permit(:uploaded_image_original_w, :uploaded_image_original_h, 
                :uploaded_image_box_w, :uploaded_image_crop_x, 
                :uploaded_image_crop_y, :uploaded_image_crop_w, 
                :uploaded_image_crop_h, :uploaded_image_aspect)

來源

2014-04-04 12:48:28

嘿，感謝您的幫助。這裏是我的表單 - <％= form_for（@ project.thumbnail.image，as =>：project，：url => project_thumbnail_path（@user，@project））do | f | ％> <％= f.cropbox：uploaded_image，：width => 500％> <％= f.crop_preview：uploaded_image，：width => 150％> <％= f.submit'Save'％> <% end %> '我認爲需要保持內部的strong_params，因爲attr_accessors在圖像模型中。 – BeamJinn

另外我試圖在fields_for標籤中包裝字段給了我一個未定義的nil：NilClass錯誤方法，因爲它不再引用附件了。 – BeamJinn

是的，'f.fields_for'需要您在嘗試使用之前構建嵌套對象。嘗試將@ project.thumbnail.image.build放入你的'new'方法 - 修復一些東西后，我會在一分鐘後看到更好的效果 –

使用嵌套屬性和has_one：through關係的「未經許可的參數」

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