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

83 lines
1.8 KiB
Go
Raw Normal View History

package storm
import (
"os"
"github.com/asdine/storm/codec"
"github.com/asdine/storm/index"
"github.com/boltdb/bolt"
)
// BoltOptions used to pass options to BoltDB.
func BoltOptions(mode os.FileMode, options *bolt.Options) func(*DB) error {
return func(d *DB) error {
d.boltMode = mode
d.boltOptions = options
return nil
}
}
// Codec used to set a custom encoder and decoder. The default is JSON.
func Codec(c codec.MarshalUnmarshaler) func(*DB) error {
return func(d *DB) error {
d.codec = c
return nil
}
}
// Batch enables the use of batch instead of update for read-write transactions.
func Batch() func(*DB) error {
return func(d *DB) error {
d.batchMode = true
return nil
}
}
// AutoIncrement used to enable bolt.NextSequence on empty integer ids.
// Deprecated: Set the increment tag to the id field instead.
func AutoIncrement() func(*DB) error {
return func(d *DB) error {
d.autoIncrement = true
return nil
}
}
// Root used to set the root bucket. See also the From method.
func Root(root ...string) func(*DB) error {
return func(d *DB) error {
d.rootBucket = root
return nil
}
}
// UseDB allow Storm to use an existing open Bolt.DB.
// Warning: storm.DB.Close() will close the bolt.DB instance.
func UseDB(b *bolt.DB) func(*DB) error {
return func(d *DB) error {
d.Path = b.Path()
d.Bolt = b
return nil
}
}
// Limit sets the maximum number of records to return
func Limit(limit int) func(*index.Options) {
return func(opts *index.Options) {
opts.Limit = limit
}
}
// Skip sets the number of records to skip
func Skip(offset int) func(*index.Options) {
return func(opts *index.Options) {
opts.Skip = offset
}
}
// Reverse will return the results in descending order
func Reverse() func(*index.Options) {
return func(opts *index.Options) {
opts.Reverse = true
}
}