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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: 2.13.1
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Labels:
The C# driver translates the following IMongoQueryable incorrectly:
collection.AsQueryable()
.Where(x =>
x.ParentSerialNumber != null
&& x.ParentLevel != null)
.GroupJoin(
collection.AsQueryable(),
c => c.ParentSerialNumber,
p => p.SerialNumber,
(c, p) => new
{
ChildSerialNumber = c.SerialNumber,
ChildLevel = c.Level,
ParentSerialNumber = c.ParentSerialNumber,
ParentLevel = c.ParentLevel,
ParentExists = p.Any(pa => pa.Level == c.ParentLevel),
ParentConsistent = p.Any(pa => pa.Level == c.ParentLevel && pa.Status == c.Status)
})
.Where(x => !x.ParentConsistent)
.OrderBy(x => x.ChildLevel)
It translates into:
aggregate([
{
"$match":{
"ParentSerialNumber":{
"$ne":null
},
"ParentLevel":{
"$ne":null
}
}
},
{
"$lookup":{
"from":"collectionName",
"localField":"ParentSerialNumber",
"foreignField":"SerialNumber",
"as":"p"
}
},
{
"$project":{
"ChildSerialNumber":"$SerialNumber",
"ChildLevel":"$Level",
"ParentSerialNumber":"$ParentSerialNumber",
"ParentLevel":"$ParentLevel",
"ParentExists":{
"$anyElementTrue":{
"$map":{
"input":"$p",
"as":"pa",
"in":{
"$eq":[
"$$pa.Level",
"$$pa.ParentLevel"
]
}
}
}
},
"ParentConsistent":{
"$anyElementTrue":{
"$map":{
"input":"$p",
"as":"pa",
"in":{
"$and":[
{
"$eq":[
"$$pa.Level",
"$$pa.ParentLevel"
]
},
{
"$eq":[
"$$pa.Status",
"$$pa.Status"
]
}
]
}
}
}
},
"_id":0
}
},
{
"$match":{
"ParentConsistent":{
"$ne":true
}
}
},
{
"$sort":{
"ChildLevel":1
}
}
])
Note the map for ParentExists and ParentConsistent properties.
The correct query would be:
aggregate([
{
"$match":{
"ParentSerialNumber":{
"$ne":null
},
"ParentLevel":{
"$ne":null
}
}
},
{
"$lookup":{
"from":"collectionName",
"localField":"ParentSerialNumber",
"foreignField":"SerialNumber",
"as":"p"
}
},
{
"$project":{
"ChildSerialNumber":"$SerialNumber",
"ChildLevel":"$Level",
"ParentSerialNumber":"$ParentSerialNumber",
"ParentLevel":"$ParentLevel",
"ParentExists":{
"$anyElementTrue":{
"$map":{
"input":"$p",
"as":"pa",
"in":{
"$eq":[
"$$pa.Level",
"$ParentLevel"
]
}
}
}
},
"ParentConsistent":{
"$anyElementTrue":{
"$map":{
"input":"$p",
"as":"pa",
"in":{
"$and":[
{
"$eq":[
"$$pa.Level",
"$ParentLevel"
]
},
{
"$eq":[
"$$pa.Status",
"$Status"
]
}
]
}
}
}
},
"_id":0
}
},
{
"$match":{
"ParentConsistent":{
"$ne":true
}
}
},
{
"$sort":{
"ChildLevel":1
}
}
])
Any such projection, even if you try to do a Select projection after GroupJoin and with any linq method yields the same incorrect query.
- is duplicated by
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- Closed
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