def create
@subjection = @subject.subjections.new
if params[:video_or_show_id].length == 20
show = Show.where(:showid => params[:video_or_show_id]).try(:first)
if show.present?
@show = show
else
begin
@show = Show.build_from_show_id(params[:video_or_show_id])
@subjection.subjectable_type = "show"
@subjection.subjectable_id = @show.id
@subjection.title = @show.showname
@subjection.sub_title = @show.showsubtitle
@subjection.description = @show.showdesc
@subjection.save
if @show.save
img_v = @subjection.pictures.new(:url => @show.show_vthumburl,
:name => "img_v")
img_v.save
img_h = @subjection.pictures.new(:url => @show.show_thumburl,
:name => "img_h")
img_h.save
end
rescue ArgumentError, Youku::DS::Error => e
@show = Show.new
@show.errors.add(:base, e.message)
redirect_to new_subject_subjection_path(@subject), :notice => "视频没有版权"
end
end
else
video = Video.where(:videoid => params[:video_or_show_id]).try(:first)
if video.present?
@video = video
else
begin
@video = Video.build_from_video_id(params[:video_or_show_id])
if @video.videoid.present?
@subjection.subjectable_type = "video"
@subjection.subjectable_id = @video.id
@subjection.description = @video.desc
@subjection.title = @video.title
@subjection.save
if @video.save
img_h = @subjection.pictures.new(:url => @video.thumburl,
:name => "img_h")
img_h.save
end
end
rescue ArgumentError, Youku::DS::Error => e
@video = Video.new
@subjection.errors.add(:base, e.message)
render :error and return
end
end
end if @subjection.save
redirect_to subject_subjections_url(@subject), notice: '新建成功'
else
render :new
end
end
修改后
if persisted? # 如果是已经保存到数据库的 ActiveRecord 对象
super # 则调用原始的 subjectable= 方法
只有在新建一个 subjection 时，调用 subjectable= 方法的时做一些特殊处理，
比如给 title, sub_title 和 description 赋值
def create
@subjection = @subject.subjections.build
id = params[:video_or_show_id] subjectable = if id.length == 20
find_or_create_show_from_show_id(id)
else
find_or_create_video_from_video_id(id)
end @subjection.subjectable = subjectable if @subjection.save
redirect_to subject_subjections_url(@subject), notice: '新建成功'
else
render :error
end
rescue ArgumentError, Youku::DS::Error => e
@subjection.errors.add(:base, e.message)
render :error
end private
def find_or_create_show_from_show_id(id)
if show = Show.find_by_showid(id)
show
else
show = Show.build_from_show_id(id)
show.save
show
end
end def find_or_create_video_from_video_id(id)
if video = Video.find_by_videoid(id)
video
else
video = Video.build_from_video_id(id)
video.save
video
end
end
def subjectable=(subjectable)
if persisted?
super
else
self.attributes = {
subjectable_type: subjectable.class.name,
subjectable_id: subjectable.id
} case subjectable
when Show
self.attributes = {
title: subjectable.showname,
sub_title: subjectable.showsubtitle,
description: subjectable.showdesc,
pictures_attributes: [{ name: 'img_h', url: subjectable.show_thumburl },
{ name: 'img_v', url: subjectable.show_vthumburl }]
}
when Video
self.attributes = {
title: subjectable.title,
description: subjectable.desc,
pictures_attributes: [{ name: 'img_h', url: subjectable.thumburl }]
}
else
super
end
end
end