这是我第一次使用数据表。我希望能够在我的项目表中显示记录并按每个字段排序。我正在关注这个 RailCast 并使用了他们提供的代码。但是,我的页面加载没有错误,但实际记录从未加载到表中——它只是无限期地显示“正在处理...”。有什么想法会导致这种情况吗?我的一些代码:
view/projects/new.html.erb(我的应用程序的索引指向的位置,以及我希望显示表格的位置)
<table id="projects" class="display" data-source="<%= projects_url(format: "json") %>">
<thead>
<tr>
<th>File</th>
<th>Author</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
项目.js.coffee
jQuery ->
$("#projects").dataTable
bProcessing: true
bServerSide: true
sAjaxSource: $('#projects').data('source')
"aaSorting": [[ 0, "desc" ]]
项目控制器
# GET /projects/new
# GET /projects/new.json
def new
@projects = Project.all
respond_to do |format|
format.html # new.html.erb
format.json { render json: ProjectsDatatable.new(view_context) }
end
end
Projects_datatable.rb
class ProjectsDatatable
delegate :params, :h, :link_to, :number_to_currency, to: :@view
def initialize(view)
@view = view
end
def as_json(options = {})
{
sEcho: params[:sEcho].to_i,
iTotalRecords: Project.count,
iTotalDisplayRecords: Project.count,
aaData: data
}
end
private
def data
projects.map do |proj|
[
h(proj.filename),
h(proj.author)
]
end
end
def projects
@projects ||= fetch_projects
end
def fetch_projects
projects = Project.order("#{sort_column} #{sort_direction}")
projects = projects.page(page).per_page(per_page)
if params[:sSearch].present?
projects = projects.where("name like :search or category like :search", search: "%#{params[:sSearch]}%")
end
projects
end
def page
params[:iDisplayStart].to_i/per_page + 1
end
def per_page
params[:iDisplayLength].to_i > 0 ? params[:iDisplayLength].to_i : 10
end
def sort_column
columns = %w[name category released_on price]
columns[params[:iSortCol_0].to_i]
end
def sort_direction
params[:sSortDir_0] == "desc" ? "desc" : "asc"
end
end
我的项目迁移:
class CreateProjects < ActiveRecord::Migration
def change
create_table :projects do |t|
t.string :filename
t.string :location
t.string :author
end
end
end
如果有人有任何意见,我将不胜感激。谢谢。