mirror of
https://gitee.com/johng/gf.git
synced 2024-12-01 03:38:35 +08:00
44 lines
1.5 KiB
Go
44 lines
1.5 KiB
Go
// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the MIT License.
|
|
// If a copy of the MIT was not distributed with this file,
|
|
// You can obtain one at https://github.com/gogf/gf.
|
|
|
|
package gdb
|
|
|
|
import (
|
|
"time"
|
|
)
|
|
|
|
// Cache sets the cache feature for the model. It caches the result of the sql, which means
|
|
// if there's another same sql request, it just reads and returns the result from cache, it
|
|
// but not committed and executed into the database.
|
|
//
|
|
// If the parameter <duration> < 0, which means it clear the cache with given <name>.
|
|
// If the parameter <duration> = 0, which means it never expires.
|
|
// If the parameter <duration> > 0, which means it expires after <duration>.
|
|
//
|
|
// The optional parameter <name> is used to bind a name to the cache, which means you can
|
|
// later control the cache like changing the <duration> or clearing the cache with specified
|
|
// <name>.
|
|
//
|
|
// Note that, the cache feature is disabled if the model is performing select statement
|
|
// on a transaction.
|
|
func (m *Model) Cache(duration time.Duration, name ...string) *Model {
|
|
model := m.getModel()
|
|
model.cacheDuration = duration
|
|
if len(name) > 0 {
|
|
model.cacheName = name[0]
|
|
}
|
|
model.cacheEnabled = true
|
|
return model
|
|
}
|
|
|
|
// checkAndRemoveCache checks and removes the cache in insert/update/delete statement if
|
|
// cache feature is enabled.
|
|
func (m *Model) checkAndRemoveCache() {
|
|
if m.cacheEnabled && m.cacheDuration < 0 && len(m.cacheName) > 0 {
|
|
m.db.GetCache().Remove(m.cacheName)
|
|
}
|
|
}
|