/
updater.go
134 lines (108 loc) · 2.33 KB
/
updater.go
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package mongodb
import (
log "github.com/sirupsen/logrus"
"github.com/LonelyPale/goutils/errors"
)
// Field Update Operators
const (
SetKey = "$set"
UnsetKey = "$unset"
IncKey = "$inc"
)
type Updater map[string]interface{}
func NewUpdater(values ...interface{}) Updater {
return make(Updater).Set(values...)
}
func Set(values ...interface{}) Updater {
return Updater{}.Set(values...)
}
func Unset(keys ...string) Updater {
return Updater{}.Unset(keys...)
}
func Inc(values ...interface{}) Updater {
return Updater{}.Inc(values...)
}
// 只支持map
func (u Updater) checkout(key string) (Updater, error) {
val, ok := u[key]
if !ok {
val = Updater{}
u[key] = val
}
updater, ok := val.(Updater)
if !ok {
err := errors.Errorf("%v object not Updater", key)
log.Warn(err)
return updater, err
}
return updater, nil
}
// { $set: { "details.make": "zzz" } }
// { $set: { "tags.1": "rain gear", "ratings.0.rating": 2 } }
// { $set: { <field1>: <value1>, ... } }
func (u Updater) Set(values ...interface{}) Updater {
number := len(values)
if number == 0 {
return u
} else if number == 1 {
u[SetKey] = values[0]
} else {
set, err := u.checkout(SetKey)
if err != nil {
return u
}
for i, n := 0, number/2; i < n; i++ {
key := values[i*2].(string)
val := values[i*2+1]
set[key] = val
}
}
return u
}
// { $unset: { quantity: "", instock: "" } }
// { $unset: { <field1>: "", ... } }
func (u Updater) Unset(keys ...string) Updater {
unset, err := u.checkout(UnsetKey)
if err != nil {
return u
}
for _, key := range keys {
unset[key] = ""
}
return u
}
// { $inc: { quantity: -2, "metrics.orders": 1 } }
// { $inc: { <field1>: <amount1>, <field2>: <amount2>, ... } }
func (u Updater) Inc(values ...interface{}) Updater {
number := len(values)
if number == 0 {
return u
} else if number == 1 {
u[IncKey] = values[0]
} else {
set, err := u.checkout(IncKey)
if err != nil {
return u
}
for i, n := 0, number/2; i < n; i++ {
key := values[i*2].(string)
val := values[i*2+1]
set[key] = val
}
}
return u
}
func (u Updater) Get(key string) interface{} {
return u[key]
}
func (u Updater) Delete(key string) {
delete(u, key)
}
func (u Updater) UpdateTime(value interface{}) Updater {
set, err := u.checkout(SetKey)
if err != nil {
return u
}
set[UpdateTimeBson] = value
return u
}