我在mongoDB中有一个包含许多文档的集合,其中一个看起来像,
{
date: '2012-10-20 12:30UTC',
personal_info: {name: 'sam', group_id: 'A1234', address:['rourkela', 'sundergarh']},
blog:[{ blog: 'Got admitted to IIT',
comments:[{
author:{name:'sam', email: 'sam@gmail.com'},
comment:'good buddy',
ph_no: 12345
},
{
author:{name:'vam', email: 'vam@gmail.com'},
comment:'happy for you',
ph_no:56789}
}]
}]
}
我的要求是在评论数组中添加子文档结构,其中博客 '已获准进入IIT'
我想附加的子文件如下:
{
author:{name:'mam', email: 'mam@gmail.com'},
comment:'great, keep it up'
}
在附加上述结构后,我的文档结构应如下所示:
{
date: '2012-10-20 12:30UTC',
personal_info: {name: 'sam', group_id: 'A1234', address:['rourkela', 'sundergarh']},
blog:[{ blog: 'Got admitted to IIT',
comments:[{
author:{name:'sam', email: 'sam@gmail.com'},
comment:'good buddy',
ph_no: 12345
},
{
author:{name:'vam', email: 'vam@gmail.com'},
comment:'happy for you',
ph_no:56789
},
{
author:{name:'mam', email: 'mam@gmail.com'},
comment:'great, keep it up'
}]
}]
}
如何通过mongo shell中的编码实现上述目的。
提前致谢..
答案 0 :(得分:0)
您可以按照以下方式执行此操作:
db.myObject.update(
{"blog.blog" : "Got admitted to IIT"},
{
"$push" : {
"blog.$.comments" : {
author: {name:'mam', email: 'mam@gmail.com'},
comment:'great, keep it up'
}
}
}
)