错误信息查找管道必须是字符串,是数组类型
Error message lookup pipeline must be a string, is type array
我正在使用 mongodb 3.6 版本。
我有车辆 table,文件如
{
"_id": ObjectId("5b976220d2ccda12fc0050fb"),
"VehicleNumber": "JK 678",
"NumberOfSeats": "47",
}
{
"_id": ObjectId("67976220d2ccda12fc005068"),
"VehicleNumber": "JK 779",
"NumberOfSeats": "47",
}
我有路线 table,数据如
{
"_id": ObjectId("5b7fb426d2ccda11fc005185"),
"Name": "New Jersey City",
"VehicleDetails": [
{
"VehicleEntryId": "b8d0d2b5-8f32-6850-4d79-34ed79138d6d",
"VehicleId": ObjectId("5b976220d2ccda12fc0050fb"),
...
"Status": "Active"
},
{
"VehicleEntryId": "b8d0d2b5-8f32-6850-4d79-34ed79138568",
"VehicleId": ObjectId("67976220d2ccda12fc005068"),
...
"Status": "Active"
}
],
...
}
我写了mongodb聚合查询像
$cursor = $this->collection->aggregate([
['$match' => ["_id" => new MongoDB\BSON\ObjectID('5b7fb426d2ccda11fc005185')]],
[
'$addFields' => [
'filteredIds' => [
'$map' => [
'input' => '$VehicleDetails',
'as' => 'item',
'in' => [
'$cond' => [
['$eq' => ['$$item.Status', 'Active']],
'$$item.VehicleId',
false
]
]
]
]
]
],
array(
'$lookup' => array(
'from' => 'VehicleTbl',
'$pipeline' => [
[ '$match'=> ["_id" => ['$in' => ['$$filteredIds'] ]]],
],
'as' => 'AllotedVehicleDetails'
)
),
])->toArray();
基本上我正在尝试将所有指定的车辆提取到特定路线。因此,我首先使用 $addFeilds 运算符获取所有主动分配的车辆 ID,并将它们放入 "filteredIds" 中,然后在查找中我尝试使用管道从车辆 table 中获取车辆信息。上面的代码抛出错误消息 'Uncaught exception 'MongoDB\Driver\Exception\RuntimeException' with message '$lookup argument '$pipeline: [ { $match: { _id: { $in: [ "$$filteredIds" ] } } } ]' must be字符串,第 32 行中的数组类型。
请帮忙!!!
使用 pipeline
而不是 $pipeline
。
示例:
{
$lookup : {
'from' : 'vehicles',
let : { localFilterIds : '$filteredIds'},
pipeline : [
{'$match' : { $expr: { '$in' : [ '$_id', '$$localFilterIds' ] }} }
],
'as' : 'AllotedVehicleDetails'
}
}
注意:这是在 mongoDb
GUI Robo 3T
.
中测试的
我正在使用 mongodb 3.6 版本。
我有车辆 table,文件如
{
"_id": ObjectId("5b976220d2ccda12fc0050fb"),
"VehicleNumber": "JK 678",
"NumberOfSeats": "47",
}
{
"_id": ObjectId("67976220d2ccda12fc005068"),
"VehicleNumber": "JK 779",
"NumberOfSeats": "47",
}
我有路线 table,数据如
{
"_id": ObjectId("5b7fb426d2ccda11fc005185"),
"Name": "New Jersey City",
"VehicleDetails": [
{
"VehicleEntryId": "b8d0d2b5-8f32-6850-4d79-34ed79138d6d",
"VehicleId": ObjectId("5b976220d2ccda12fc0050fb"),
...
"Status": "Active"
},
{
"VehicleEntryId": "b8d0d2b5-8f32-6850-4d79-34ed79138568",
"VehicleId": ObjectId("67976220d2ccda12fc005068"),
...
"Status": "Active"
}
],
...
}
我写了mongodb聚合查询像
$cursor = $this->collection->aggregate([
['$match' => ["_id" => new MongoDB\BSON\ObjectID('5b7fb426d2ccda11fc005185')]],
[
'$addFields' => [
'filteredIds' => [
'$map' => [
'input' => '$VehicleDetails',
'as' => 'item',
'in' => [
'$cond' => [
['$eq' => ['$$item.Status', 'Active']],
'$$item.VehicleId',
false
]
]
]
]
]
],
array(
'$lookup' => array(
'from' => 'VehicleTbl',
'$pipeline' => [
[ '$match'=> ["_id" => ['$in' => ['$$filteredIds'] ]]],
],
'as' => 'AllotedVehicleDetails'
)
),
])->toArray();
基本上我正在尝试将所有指定的车辆提取到特定路线。因此,我首先使用 $addFeilds 运算符获取所有主动分配的车辆 ID,并将它们放入 "filteredIds" 中,然后在查找中我尝试使用管道从车辆 table 中获取车辆信息。上面的代码抛出错误消息 'Uncaught exception 'MongoDB\Driver\Exception\RuntimeException' with message '$lookup argument '$pipeline: [ { $match: { _id: { $in: [ "$$filteredIds" ] } } } ]' must be字符串,第 32 行中的数组类型。
请帮忙!!!
使用 pipeline
而不是 $pipeline
。
示例:
{
$lookup : {
'from' : 'vehicles',
let : { localFilterIds : '$filteredIds'},
pipeline : [
{'$match' : { $expr: { '$in' : [ '$_id', '$$localFilterIds' ] }} }
],
'as' : 'AllotedVehicleDetails'
}
}
注意:这是在 mongoDb
GUI Robo 3T
.