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Merge pull request #484 from etelej/master

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Add bucket check to db.View in readme.md
This commit is contained in:
Ben Johnson 2016-01-11 18:59:16 -08:00
commit 4030e7fbc1
1 changed files with 6 additions and 1 deletions
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7
README.md
View File

@ -349,7 +349,9 @@ iteration over these keys extremely fast. To iterate over keys we'll use a
```go
db.View(func(tx *bolt.Tx) error {
// Assume bucket exists and has keys
b := tx.Bucket([]byte("MyBucket"))
c := b.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
@ -390,6 +392,7 @@ To iterate over a key prefix, you can combine `Seek()` and `bytes.HasPrefix()`:
```go
db.View(func(tx *bolt.Tx) error {
// Assume bucket exists and has keys
c := tx.Bucket([]byte("MyBucket")).Cursor()
prefix := []byte("1234")
@ -409,7 +412,7 @@ date range like this:
```go
db.View(func(tx *bolt.Tx) error {
// Assume our events bucket has RFC3339 encoded time keys.
// Assume our events bucket exists and has RFC3339 encoded time keys.
c := tx.Bucket([]byte("Events")).Cursor()
// Our time range spans the 90's decade.
@ -433,7 +436,9 @@ all the keys in a bucket:
```go
db.View(func(tx *bolt.Tx) error {
// Assume bucket exists and has keys
b := tx.Bucket([]byte("MyBucket"))
b.ForEach(func(k, v []byte) error {
fmt.Printf("key=%s, value=%s\n", k, v)
return nil