Rails添加字段到carrierwave宝石

我有一个News模型与Carrierwave AttachmentUploader安装。Rails添加字段到carrierwave宝石

JSON的输出是这样的：

{ 
    "id": 158, 
    "title": "title1", 
    "description": "desc1", 
    "category": "ipsum", 
    "attachments": [ 
    { 
     "url": "/uploads/news/attachments/158/Tesla_P100D_App_v3.0_Review.mp4", 
     "content_type": "application/mp4" 
    } 
    ], 
    "created_at": "2017-02-14T08:34:14.119Z" 
}

我想thumbnail字段添加到Carrierwave获得电流输出：

{ 
    "id": 158, 
    "title": "title1", 
    "description": "desc1", 
    "category": "ipsum", 
    "attachments": [ 
    { 
     "url": "/uploads/news/attachments/158/Tesla_P100D_App_v3.0_Review.mp4", 
     "content_type": "application/mp4", 
     "thumbnail": { 
       "name": "Tesla_P100D_App_v3.0_Review", 
       "url": "/uploads/news/attachments/158/Tesla_P100D_App_v3.0_Review.png" 
} 
    } 
    ], 
    "created_at": "2017-02-14T08:34:14.119Z" 
}

这里是我的NewsSerializer：

class NewsSerializer < ActiveModel::Serializer 
    attributes :id, :title, :description, :latitude, :longitude, :category, :tag_list, :avg_rating, :attachments, :created_at 

def attachments 
    a=[] 
    object.attachments.each do |att| 
     a << {url: att.url, content_type: att.content_type} 
    end 
    a 
end 

end

我该怎么做呢？

来源

2017-02-14 Roman Kanafotskiy

不要添加额外的字段，您可以用活动记录串行实现它。你能更新你的完整的JSON吗？ –

@DipakG。只是更新了代码。我需要存储将由客户端发送给我的'thumbnail' url。我如何用序列化程序实现它？ –

好吧，我设法通过在我的mac上安装ffmpeg和gem 'carrierwave-video-thumbnailer'来完成此操作。

并补充thumb我NewsSerializer

def attachments 
    a=[] 
    object.attachments.each do |att| 
     a << {url: att.url, content_type: att.content_type, thumb: att.thumb} 
    end 
    a 
end

来源

2017-02-14 12:59:42

Rails添加字段到carrierwave宝石

回答

相关问题