[英]Using $match in aggregation query
I have these values in my Mongodb: 我的Mongodb中有这些值:
{
"_id" : ObjectId("4feb9d573752c8a33a000001"),
"name" : "TSP1",
"Server" : "S1",
"active" : true,
"tag" : "<A HREF=\"[FAST_1]http://www.google.com"><IMG SRC=\"http://ad.google.com.CO/B5981883.7;sz=300x50;ord=[TIMESTAMP]?\" BORDER=0 WIDTH=300 HEIGHT=50 ALT=\"ment\"></A>"
},
{
"_id" : ObjectId("4feb9d573752c8a33a000001"),
"name" : "TSP2",
"Server" : "S1",
"active" : true,
"tag" : "<A HREF=\"[FAST_1]http://www.google.com"><IMG SRC=\"http://ad.ITG.com.CO/B5981883.7;sz=300x50;ord=[TIMESTAMP]?\" BORDER=0 WIDTH=300 HEIGHT=50 ALT=\"ment\"></A>"
}
{
"_id" : ObjectId("4feb9d573752c8a33a000003"),
"name" : "TSP3",
"Server" : "S2",
"active" : true,
"tag" : "<A HREF=\"[FAST_2]http://www.google.com"><IMG SRC=\"http://ad.Yahoo.com.CO/B5981883.7;sz=300x50;ord=[TIMESTAMP]?\" BORDER=0 WIDTH=300 HEIGHT=50 ALT=\"ment\"></A>"
}
I am trying to get this result out: 我试图得到这个结果:
"result" : [
{
"_id" : "S1",
"count" : 2
}]
This is the query that i am using: 这是我正在使用的查询:
db.creative.aggregate([ { $match : { tag : { $regex : /[FAST_1]/ } }}, { $group: { _id : "$Server", count: { $sum: 1} }} ]);
Also, tried this: 另外,尝试了这个:
db.creative.aggregate([ {$match : {"tag" : /[FAST_1]/ }}, { $group: { _id : "$Server", count: { $sum: 1}}} ])
But i keep getting this result: 但我一直得到这个结果:
{
"_id" : "S1",
"count" : 2
},
{
"_id" : "S2",
"count" : 1
}
Even if i change FAST_1 to FAST_2 i get the same result. 即使我将FAST_1更改为FAST_2,我也会得到相同的结果。
Any help is appreciated. 任何帮助表示赞赏。
Thanks 谢谢
您需要在大括号[]周围使用正则表达式。
db.creative.aggregate([ { $match : { tag : { $regex : /\[FAST_1\]/ } }}, ...
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