Comments (4)
Currently there is no cursors at the BoltHold level, but Bolt itself supports cursors, and getting it directly from the source is one option.
https://godoc.org/github.com/timshannon/bolthold#Store.Bolt
You could have cursor-like functionality by using the MatchFunc query.
bolthold.Where("Name").MatchFunc(func(ra *bolthold.RecordAccess) (bool, error) {
// if record matches my criteria call func to process on this record
// always return false so values don't get added into memory of matching records
}),
I could see adding a ForEach
method that runs a query for each matching record of a query. It would basically do the same thing as the above.
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Added #74 to track adding a forEach method.
It should be possible, but there may be some complications with Or's and skips. We'll see.
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You can now use ForEach
for this:
err := store.ForEach(boltholdWhere("Id").Gt(4), func(record *Item) error {
// do stuff with record
// if you return an error, then the query will stop iterating through records
return nil
})
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nice! thanks for implementing this, I look forward to trying it.
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Related Issues (20)
- Is there a way to iterate from end of bucket using forEach HOT 10
- Query Builder approach HOT 6
- 如何查询某个bucket的全部数据 HOT 1
- his error occurs when fetching data from a specific bucket HOT 8
- readme.md: boltholdIndex, boltHoldIndex HOT 4
- Upsert with custom Storer delivers inconsistent value type to index function HOT 2
- Multiple calls to Delete for non-existing key result in EOF error instead of ErrNotFound HOT 2
- Add method to wrap existing bolt instance HOT 1
- Q: limit query without conditions HOT 2
- Unique index
- Can't sort by PK HOT 1
- Add support for batch inserts HOT 2
- Distinct constraint HOT 2
- Get vs FindOne HOT 9
- Web UI
- Aggregate query on nested struct HOT 2
- Constraint pairs HOT 1
- Slow write speeds HOT 7
- Initialise read only store HOT 2
- foreach can't use, when the key's type is uint64 HOT 1
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