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Type:
Improvement
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Change streams
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Query Execution
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(copied to CRM)
Here are outputs for corresponding steps, What I need is to manipulate the deleted array item, but it seems not workable.
1) First , here is the initial data in the database,
there're 3 outer array items "test-0, test-1, test-2" with each has 3 inner array items "nest-test-0,nest-test-1,nest-test-3":
{
"_id": "5cf7553cc6b365a5c72f2163",
"opendaylight-mdsal-binding-test:top": {
"top-level-list": [
{
"name": "test-0",
"nested-list": [
{"name": "nest-test-0", "type": "nest-type-0"},
{"name": "nest-test-1", "type": "nest-type-1"},
{"name": "nest-test-2", "type": "nest-type-2"}
],
"simple": "simple-case"
},
{
"name": "test-1",
"nested-list": [
{"name": "nest-test-0", "type": "nest-type-0"},
{"name": "nest-test-1", "type": "nest-type-1"},
{"name": "nest-test-2", "type": "nest-type-2"}
],
"simple": "simple-case"
},
{
"name": "test-2",
"nested-list": [
{"name": "nest-test-0", "type": "nest-type-0"},
{"name": "nest-test-1", "type": "nest-type-1"},
{"name": "nest-test-2", "type": "nest-type-2"}
],
"simple": "simple-case"
}
]
}
}
2) Next , I pull one nested array item by calling 'collection.updateOne(...)' where 'Update' and 'UpdateOptions' like:
Update{fieldName='opendaylight-mdsal-binding-test:top.top-level-list.$[item0].nested-list', operator='$pull', value=Document{{name=nest-test-2}}}
UpdateOptions{upsert=true, bypassDocumentValidation=null, collation=null, arrayFilters=[And Filter{filters=[Filter{fieldName='item0.name', value=test-0}]}]}
It's clear above that I specify the '$[item0]' with 'Filter{fieldName='item0.name', value=test-0}' to delete the inner array item 'nest-test-2' from outer array item 'test-0'.
3) After step 2), finally I recieve the change event:
ChangeStreamDocument {
resumeToken = {
"_data":
"825CF75C47000000022B022C0100296E5A10042A6A4D3FE1F64145A8D27037F0BA45BD46645F696400645CF75C47D4CE6723E929EA0B0004"
},
namespace = configuration.urn: opendaylight: params: xml: ns: yang: mdsal: test: binding @2014 -
07 - 01,
fullDocument = Document{
{
_id = 5cf75c47d4ce6723e929ea0b,
opendaylight - mdsal - binding -
test:
top = Document{
{top - level - list =
[
Document{
{name = test - 0,
nested - list =
[
Document{{name = nest - test - 0, type = nest - type - 0}},
Document{{name = nest - test - 1, type = nest - type - 1}}
],
simple = simple - case}
},
Document{
{name = test - 1,
nested - list =
[
Document{{name = nest - test - 0, type = nest - type - 0}},
Document{{name = nest - test - 1, type = nest - type - 1}},
Document{{name = nest - test - 2, type = nest - type - 2}}
],
simple = simple - case}
},
Document{
{name = test - 2,
nested - list =
[
Document{{name = nest - test - 0, type = nest - type - 0}},
Document{{name = nest - test - 1, type = nest - type - 1}},
Document{{name = nest - test - 2, type = nest - type - 2}}
],
simple = simple - case}
}
]}
}
}
},
documentKey = {"_id": {"$oid": "5cf75c47d4ce6723e929ea0b"}},
clusterTime = Timestamp{value = 6698924430749335554, seconds = 1559714887, inc = 2},
operationType = OperationType{value = 'update'}, updateDescription = UpdateDescription {
removedFields = [], updatedFields = {
"opendaylight-mdsal-binding-test:top.top-level-list.0.nested-list": [
{"name": "nest-test-0", "type": "nest-type-0"},
{"name": "nest-test-1", "type": "nest-type-1"}
]
}
}
}
From the output we can see that it's an 'update' operation type and the 'updatedFields' is :
{"opendaylight-mdsal-binding-test:top.top-level-list.0.nested-list": [{"name": "nest-test-0", "type": "nest-type-0"}, {"name": "nest-test-1", "type": "nest-type-1"}]}}
Note 'updatedFields' above just provides data after '$pull', but I really need to see detail deleted data information "what I delete from where", an idealy output I would prefer is like kind of :
{"opendaylight-mdsal-binding-test:top.top-level-list.0.nested-list": [{
"array-filter": {"0": {"name": "test-0"}},
"pulled":{"name": "nest-test-2", "type": "nest-type-2"},
"current": {"name": "nest-test-0", "type": "nest-type-0"}, {"name": "nest-test-1", "type": "nest-type-1"}]}}
}
In this way , with 'array-filter' and 'pulled' fields, I could get the deleted data and notify listeners just like 'DataTreeChangeService' does:
- backports
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JAVA-3228 Watch with project pipeline didn't work correctly.
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- Closed
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- is related to
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- Closed
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- Closed
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- links to