Created
June 1, 2017 16:00
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Aggregate for file collection
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// variables used in query | |
_path="/path/to/my/folder"; | |
basepath="folder"; | |
collname="files"; | |
// my example collection contents | |
db.getCollection(collname).find() | |
{ "_id" : 1, "name" : "", "type" : "folder", "createdAt" : ISODate("2017-05-02T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z") } | |
{ "_id" : 2, "name" : "path", "type" : "folder", "createdAt" : ISODate("2017-02-05T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 1 } | |
{ "_id" : 3, "name" : "to", "type" : "folder", "createdAt" : ISODate("2017-03-01T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 2 } | |
{ "_id" : 4, "name" : "my", "type" : "folder", "createdAt" : ISODate("2017-01-21T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 3 } | |
{ "_id" : 5, "name" : "folder", "type" : "folder", "createdAt" : ISODate("2017-01-21T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 4 } | |
{ "_id" : 6, "name" : "file1.txt", "type" : "file", "createdAt" : ISODate("2017-01-21T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 5 } | |
{ "_id" : 7, "name" : "file2.txt", "type" : "file", "createdAt" : ISODate("2017-01-25T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 5 } | |
{ "_id" : 8, "name" : "file3.txt", "type" : "file", "createdAt" : ISODate("2017-01-25T05:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 5 } | |
{ "_id" : 9, "name" : "subdir", "type" : "folder", "createdAt" : ISODate("2017-05-02T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 5 } | |
{ "_id" : 10, "name" : "etc", "type" : "folder", "createdAt" : ISODate("2017-05-02T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 1 } | |
{ "_id" : 11, "name" : "usr", "type" : "folder", "createdAt" : ISODate("2017-05-02T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 1 } | |
{ "_id" : 12, "name" : "their", "type" : "folder", "createdAt" : ISODate("2017-05-01T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 3 } | |
{ "_id" : 13, "name" : "folder", "type" : "folder", "createdAt" : ISODate("2017-04-01T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 12 } | |
{ "_id" : 14, "name" : "notmyfiles", "type" : "file", "createdAt" : ISODate("2017-04-01T04:00:00Z"), "updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), "parentId" : 13 } | |
// actual aggregation | |
db.getCollection(collname).aggregate([ | |
{$match:{type:"folder",name: basepath}}, | |
{$graphLookup:{ | |
from:collname, | |
startWith:"$parentId", | |
connectFromField:"parentId", | |
connectToField:"_id", | |
as:"paths", | |
restrictSearchWithMatch:{ | |
type:"folder", | |
parentId:{$ne:null} | |
}, | |
depthField:"d" | |
}}, | |
{$addFields:{ | |
ordered:{$map:{ | |
input:{$range:[0, {$size:"$paths"}]}, | |
as:"i", | |
in:{ $arrayElemAt:[ | |
{$filter:{input:"$paths",cond:{$eq:["$$this.d","$$i"]}}}, | |
0 | |
]} | |
}} | |
}}, | |
{$addFields:{ | |
path:{$concat:[ | |
"/", | |
{$reduce:{ | |
input:"$ordered.name", | |
initialValue:"", | |
in:{$concat:["$$this","/","$$value"]}}}, | |
basepath | |
]} | |
}}, | |
{$project:{paths:0, ordered:0}}, | |
{$match:{path:_path}}, | |
{$lookup:{ | |
from:collname, | |
localField:"_id", | |
foreignField:"parentId", | |
as:"allFiles" | |
}} | |
]).toArray() | |
[ | |
{ | |
"_id" : 5, | |
"name" : "folder", | |
"type" : "folder", | |
"createdAt" : ISODate("2017-01-21T05:00:00Z"), | |
"updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), | |
"parentId" : 4, | |
"path" : "/path/to/my/folder", | |
"allFiles" : [ | |
{ | |
"_id" : 6, | |
"name" : "file1.txt", | |
"type" : "file", | |
"createdAt" : ISODate("2017-01-21T05:00:00Z"), | |
"updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), | |
"parentId" : 5 | |
}, | |
{ | |
"_id" : 7, | |
"name" : "file2.txt", | |
"type" : "file", | |
"createdAt" : ISODate("2017-01-25T05:00:00Z"), | |
"updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), | |
"parentId" : 5 | |
}, | |
{ | |
"_id" : 8, | |
"name" : "file3.txt", | |
"type" : "file", | |
"createdAt" : ISODate("2017-01-25T05:00:00Z"), | |
"updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), | |
"parentId" : 5 | |
}, | |
{ | |
"_id" : 9, | |
"name" : "subdir", | |
"type" : "folder", | |
"createdAt" : ISODate("2017-05-02T04:00:00Z"), | |
"updatedAt" : ISODate("2017-05-25T19:07:19.240Z"), | |
"parentId" : 5 | |
} | |
] | |
} | |
] |
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