Rails 4 如何参数化枚举
Rails 4 how to parameterize enum
如何参数化枚举?我需要使用枚举作为数据类型为整数值的参数。
models/product.rb
class Product < ActiveRecord::Base
enum category_id: [ :hotel, :travel, :restaurant ]
end
views/products/sidebar
<div class="col-md-3">
<ul class="list-group">
<li class="list-group-item">
<span class="badge"><%= Product.where(user_id: current_user).count %></span>
<a href="<%= provider_root_path %>">All</a>
</li>
<% @categories.each do |category| %>
<li class="list-group-item">
<span class="badge"><%= Product.where(category_id: category[1]).count %></span>
<a href="<%= provider_product_category_path(category[0].parameterize) %>"><%= category[0].titleize %></a>
</li>
<% end %>
</ul>
</div>
这条线正是我想要的:
<%= product_category_path(category[0].parameterize) %>
它产生:
'/product/category/travel'
这是我的问题:
controllers/product_controller.rb
def category
@products = Product.where(category_id: params[:category_id]).order("created_at DESC")
@categories = @products.category_ids
end
我需要将 params[:category_id]
更改为整数。我试过 params[:category_id].to_i
但它总是 return 0.
有人可以帮忙吗?提前致谢:)
要使产品成功,您需要:
Product.where(category_id: params[:category_id].to_sym).order(anything_you_want)
要获得严格的整数,您需要:
Product.category_ids[params[:category_id].to_sym]
如何参数化枚举?我需要使用枚举作为数据类型为整数值的参数。
models/product.rb
class Product < ActiveRecord::Base
enum category_id: [ :hotel, :travel, :restaurant ]
end
views/products/sidebar
<div class="col-md-3">
<ul class="list-group">
<li class="list-group-item">
<span class="badge"><%= Product.where(user_id: current_user).count %></span>
<a href="<%= provider_root_path %>">All</a>
</li>
<% @categories.each do |category| %>
<li class="list-group-item">
<span class="badge"><%= Product.where(category_id: category[1]).count %></span>
<a href="<%= provider_product_category_path(category[0].parameterize) %>"><%= category[0].titleize %></a>
</li>
<% end %>
</ul>
</div>
这条线正是我想要的:
<%= product_category_path(category[0].parameterize) %>
它产生:
'/product/category/travel'
这是我的问题:
controllers/product_controller.rb
def category
@products = Product.where(category_id: params[:category_id]).order("created_at DESC")
@categories = @products.category_ids
end
我需要将 params[:category_id]
更改为整数。我试过 params[:category_id].to_i
但它总是 return 0.
有人可以帮忙吗?提前致谢:)
要使产品成功,您需要:
Product.where(category_id: params[:category_id].to_sym).order(anything_you_want)
要获得严格的整数,您需要:
Product.category_ids[params[:category_id].to_sym]