我按照Ryan Bates教程向sort table columns
实现了这个并且它工作得很好,但是当我渲染索引页时,表已经按标题(asc)排序了,我想只对列进行排序用户单击列标题。
我怎么能实现这个目标?
代码
控制器
class ProductsController < ApplicationController
helper_method :sort_column, :sort_direction
def index
@products = Product.order(sort_column + " " + sort_direction)
end
# ...
private
def sort_column
Product.column_names.include?(params[:sort]) ? params[:sort] : "name"
end
def sort_direction
%w[asc desc].include?(params[:direction]) ? params[:direction] : "asc"
end
end
是helper_method
def sortable(column, title = nil)
title ||= column.titleize
css_class = column == sort_column ? "current #{sort_direction}" : nil
direction = column == sort_column && sort_direction == "asc" ? "desc" : "asc"
link_to title, {:sort => column, :direction => direction}, {:class => css_class}
end
index.html.erb
<tr>
<th><%= sortable "name" %></th>
<th><%= sortable "price" %></th>
<th><%= sortable "released_at", "Released" %></th>
</tr>
CSS
.pretty th .current {
padding-right: 12px;
background-repeat: no-repeat;
background-position: right center;
}
.pretty th .asc {
background-image: url(/images/up_arrow.gif);
}
.pretty th .desc {
background-image: url(/images/down_arrow.gif);
}
答案 0 :(得分:6)
你应该看看Ransack。它在排序和复杂搜索方面做得很好。有一个很棒的RailsCasts视频可以帮助你,并且侵入性更小。
答案 1 :(得分:2)
万一有人会发现这个问题。可排序列有一个很棒的宝石(不仅如此):https://github.com/leikind/wice_grid
看看这些例子: http://wicegrid.herokuapp.com/
答案 2 :(得分:1)
您可以尝试对索引方法进行if检查
def index
if sort_column and sort_direction
@products = Product.order(sort_column + " " + sort_direction)
else
@products = Product.all()
end
end
def sort_column
Product.column_names.include?(params[:sort]) ? params[:sort] : nil
end
def sort_direction
%w[asc desc].include?(params[:direction]) ? params[:direction] : nil
end