Can I index a key in a multidimensional array?
Say I have a collection with documents like this
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
Can I create an index for key?
mongodb
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
add a comment |
Say I have a collection with documents like this
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
Can I create an index for key?
mongodb
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
1
No. the doc reads: "Multikey indexes can be constructed over arrays that hold both scalar values and nested documents". Nested arrays are neither documents nor scalars.
– Alex Blex
Apr 21 '17 at 9:59
add a comment |
Say I have a collection with documents like this
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
Can I create an index for key?
mongodb
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
Say I have a collection with documents like this
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
Can I create an index for key?
mongodb
mongodb
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
asked Apr 21 '17 at 9:18
ziyuangziyuang
1,77342756
1,77342756
1
No. the doc reads: "Multikey indexes can be constructed over arrays that hold both scalar values and nested documents". Nested arrays are neither documents nor scalars.
– Alex Blex
Apr 21 '17 at 9:59
add a comment |
1
No. the doc reads: "Multikey indexes can be constructed over arrays that hold both scalar values and nested documents". Nested arrays are neither documents nor scalars.
– Alex Blex
Apr 21 '17 at 9:59
1
1
No. the doc reads: "Multikey indexes can be constructed over arrays that hold both scalar values and nested documents". Nested arrays are neither documents nor scalars.
– Alex Blex
Apr 21 '17 at 9:59
No. the doc reads: "Multikey indexes can be constructed over arrays that hold both scalar values and nested documents". Nested arrays are neither documents nor scalars.
– Alex Blex
Apr 21 '17 at 9:59
add a comment |
1 Answer
1
active
oldest
votes
Looking at this SO answer: MongoDB Query Help - query on values of any key in a sub-object
NOTE: This answer contains suggestion to update the schema in order to achieve desired result.
Change the schema from:
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
to something like this:
"top_key" : [
key_name: "key", key_value: "value1"
,
key_name: "key", key_value: "value2"
,
key_name: "key", key_value: "value3"
,
key_name: "key", key_value: "value4"
]
Then you can index on top_key.key_value and query in a way:
db.settings.ensureIndex( "top_key.key_value" : 1)
db.settings.find( "top_key.key_value" : "value4" )
Do let me know if it helps.
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Looking at this SO answer: MongoDB Query Help - query on values of any key in a sub-object
NOTE: This answer contains suggestion to update the schema in order to achieve desired result.
Change the schema from:
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
to something like this:
"top_key" : [
key_name: "key", key_value: "value1"
,
key_name: "key", key_value: "value2"
,
key_name: "key", key_value: "value3"
,
key_name: "key", key_value: "value4"
]
Then you can index on top_key.key_value and query in a way:
db.settings.ensureIndex( "top_key.key_value" : 1)
db.settings.find( "top_key.key_value" : "value4" )
Do let me know if it helps.
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
add a comment |
Looking at this SO answer: MongoDB Query Help - query on values of any key in a sub-object
NOTE: This answer contains suggestion to update the schema in order to achieve desired result.
Change the schema from:
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
to something like this:
"top_key" : [
key_name: "key", key_value: "value1"
,
key_name: "key", key_value: "value2"
,
key_name: "key", key_value: "value3"
,
key_name: "key", key_value: "value4"
]
Then you can index on top_key.key_value and query in a way:
db.settings.ensureIndex( "top_key.key_value" : 1)
db.settings.find( "top_key.key_value" : "value4" )
Do let me know if it helps.
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
add a comment |
Looking at this SO answer: MongoDB Query Help - query on values of any key in a sub-object
NOTE: This answer contains suggestion to update the schema in order to achieve desired result.
Change the schema from:
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
to something like this:
"top_key" : [
key_name: "key", key_value: "value1"
,
key_name: "key", key_value: "value2"
,
key_name: "key", key_value: "value3"
,
key_name: "key", key_value: "value4"
]
Then you can index on top_key.key_value and query in a way:
db.settings.ensureIndex( "top_key.key_value" : 1)
db.settings.find( "top_key.key_value" : "value4" )
Do let me know if it helps.
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
Looking at this SO answer: MongoDB Query Help - query on values of any key in a sub-object
NOTE: This answer contains suggestion to update the schema in order to achieve desired result.
Change the schema from:
"top_key" : [
[
"key" : "value1"
,
"key" : "value2"
],
[
"key" : "value3"
,
"key" : "value4"
]
]
to something like this:
"top_key" : [
key_name: "key", key_value: "value1"
,
key_name: "key", key_value: "value2"
,
key_name: "key", key_value: "value3"
,
key_name: "key", key_value: "value4"
]
Then you can index on top_key.key_value and query in a way:
db.settings.ensureIndex( "top_key.key_value" : 1)
db.settings.find( "top_key.key_value" : "value4" )
Do let me know if it helps.
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
answered Nov 14 '18 at 15:00
Nishutosh SharmaNishutosh Sharma
1,16421528
1,16421528
add a comment |
add a comment |
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No. the doc reads: "Multikey indexes can be constructed over arrays that hold both scalar values and nested documents". Nested arrays are neither documents nor scalars.
– Alex Blex
Apr 21 '17 at 9:59