Activeadmin表格选择下拉更新

Question

我有一个类别模型和一个子类别模型和id像SubCategory选择输入来刷新，取决于与我选择的特定类别关联的SubCategories。

form do |f| 
    f.inputs do 
     f.input :title 
     f.input :category, as: :select, collection: Category.all, :input_html => { :class => 'chzn-select', :width => 'auto', "data-placeholder" => 'Click' } 
     f.input :sub_category, as: :select, collection: SubCategory.all, :input_html => { :class => 'chzn-select', :width => 'auto', "data-placeholder" => 'Click' } 
    end 
    f.actions 
end 

Answer 1

1. 你必须创建一个构件的动作（方法：GET，则params：所选择的类别的ID）中，返回的子类别（在JSON，例如）的ActiveAdmin类别模型属于选择类别：

   https://github.com/activeadmin/activeadmin/blob/master/docs/8-custom-actions.md#member-actions

2. 你必须使用jQuery（对于〔实施例）与阿贾克斯，即填充子类别选择输入时，类别选择输入已更改：

   Populate Select box options on click with Javascript/Jquery with Json data https://forum.jquery.com/topic/best-practices-for-populating-selects-with-ajax

Answer 2

您可以使用依赖于选择用于此目的。 例子说明here

主动联系

ActiveAdmin.register CatalogsProduct do 
    form do |f| 
    f.inputs "Details" do 
     f.input :product, :as => :select, :collection => Product.all.collect {|product| [product.name, product.id] } 
     f.input :catalog, :as => :select, :input_html => {'data-option-dependent' => true, 'data-option-url' => '/products/:catalogs_product_product_id/catalogs', 'data-option-observed' => 'catalogs_product_product_id'}, :collection => (resource.product ? resource.product.category.catalogs.collect {|catalog| [catalog.attr_name, catalog.id]} : []) 
    end 
    f.actions 
    end 
end 

目录控制器

class CatalogsController < ApplicationController 
    respond_to :json 

    def index 
    if params[:product_id] 
     product = Product.find_by_id(params[:product_id]) 
     @catalogs = product.category.catalogs 
    else 
     @catalogs = Catalog.all 
    end 
    render :json => @catalogs.collect {|catalog| {:id => catalog.id, :name => catalog.attr_name} } 
    end 
end