gorush/vendor/github.com/asdine/storm/bucket.go

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package storm
import "github.com/boltdb/bolt"
// CreateBucketIfNotExists creates the bucket below the current node if it doesn't
// already exist.
func (n *node) CreateBucketIfNotExists(tx *bolt.Tx, bucket string) (*bolt.Bucket, error) {
var b *bolt.Bucket
var err error
bucketNames := append(n.rootBucket, bucket)
for _, bucketName := range bucketNames {
if b != nil {
if b, err = b.CreateBucketIfNotExists([]byte(bucketName)); err != nil {
return nil, err
}
} else {
if b, err = tx.CreateBucketIfNotExists([]byte(bucketName)); err != nil {
return nil, err
}
}
}
return b, nil
}
// GetBucket returns the given bucket below the current node.
func (n *node) GetBucket(tx *bolt.Tx, children ...string) *bolt.Bucket {
var b *bolt.Bucket
bucketNames := append(n.rootBucket, children...)
for _, bucketName := range bucketNames {
if b != nil {
if b = b.Bucket([]byte(bucketName)); b == nil {
return nil
}
} else {
if b = tx.Bucket([]byte(bucketName)); b == nil {
return nil
}
}
}
return b
}