458 lines
12 KiB
Go
458 lines
12 KiB
Go
// Copyright 2016 The Xorm Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package xorm
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/go-xorm/builder"
|
|
"github.com/go-xorm/core"
|
|
)
|
|
|
|
const (
|
|
tpStruct = iota
|
|
tpNonStruct
|
|
)
|
|
|
|
// Find retrieve records from table, condiBeans's non-empty fields
|
|
// are conditions. beans could be []Struct, []*Struct, map[int64]Struct
|
|
// map[int64]*Struct
|
|
func (session *Session) Find(rowsSlicePtr interface{}, condiBean ...interface{}) error {
|
|
defer session.resetStatement()
|
|
if session.IsAutoClose {
|
|
defer session.Close()
|
|
}
|
|
|
|
sliceValue := reflect.Indirect(reflect.ValueOf(rowsSlicePtr))
|
|
if sliceValue.Kind() != reflect.Slice && sliceValue.Kind() != reflect.Map {
|
|
return errors.New("needs a pointer to a slice or a map")
|
|
}
|
|
|
|
sliceElementType := sliceValue.Type().Elem()
|
|
|
|
var tp = tpStruct
|
|
if session.Statement.RefTable == nil {
|
|
if sliceElementType.Kind() == reflect.Ptr {
|
|
if sliceElementType.Elem().Kind() == reflect.Struct {
|
|
pv := reflect.New(sliceElementType.Elem())
|
|
session.Statement.setRefValue(pv.Elem())
|
|
} else {
|
|
//return errors.New("slice type")
|
|
tp = tpNonStruct
|
|
}
|
|
} else if sliceElementType.Kind() == reflect.Struct {
|
|
pv := reflect.New(sliceElementType)
|
|
session.Statement.setRefValue(pv.Elem())
|
|
} else {
|
|
//return errors.New("slice type")
|
|
tp = tpNonStruct
|
|
}
|
|
}
|
|
|
|
var table = session.Statement.RefTable
|
|
|
|
var addedTableName = (len(session.Statement.JoinStr) > 0)
|
|
var autoCond builder.Cond
|
|
if tp == tpStruct {
|
|
if !session.Statement.noAutoCondition && len(condiBean) > 0 {
|
|
var err error
|
|
autoCond, err = session.Statement.buildConds(table, condiBean[0], true, true, false, true, addedTableName)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
} else {
|
|
// !oinume! Add "<col> IS NULL" to WHERE whatever condiBean is given.
|
|
// See https://github.com/go-xorm/xorm/issues/179
|
|
if col := table.DeletedColumn(); col != nil && !session.Statement.unscoped { // tag "deleted" is enabled
|
|
var colName = session.Engine.Quote(col.Name)
|
|
if addedTableName {
|
|
var nm = session.Statement.TableName()
|
|
if len(session.Statement.TableAlias) > 0 {
|
|
nm = session.Statement.TableAlias
|
|
}
|
|
colName = session.Engine.Quote(nm) + "." + colName
|
|
}
|
|
if session.Engine.dialect.DBType() == core.MSSQL {
|
|
autoCond = builder.IsNull{colName}
|
|
} else {
|
|
autoCond = builder.IsNull{colName}.Or(builder.Eq{colName: "0001-01-01 00:00:00"})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var sqlStr string
|
|
var args []interface{}
|
|
if session.Statement.RawSQL == "" {
|
|
if len(session.Statement.TableName()) <= 0 {
|
|
return ErrTableNotFound
|
|
}
|
|
|
|
var columnStr = session.Statement.ColumnStr
|
|
if len(session.Statement.selectStr) > 0 {
|
|
columnStr = session.Statement.selectStr
|
|
} else {
|
|
if session.Statement.JoinStr == "" {
|
|
if columnStr == "" {
|
|
if session.Statement.GroupByStr != "" {
|
|
columnStr = session.Statement.Engine.Quote(strings.Replace(session.Statement.GroupByStr, ",", session.Engine.Quote(","), -1))
|
|
} else {
|
|
columnStr = session.Statement.genColumnStr()
|
|
}
|
|
}
|
|
} else {
|
|
if columnStr == "" {
|
|
if session.Statement.GroupByStr != "" {
|
|
columnStr = session.Statement.Engine.Quote(strings.Replace(session.Statement.GroupByStr, ",", session.Engine.Quote(","), -1))
|
|
} else {
|
|
columnStr = "*"
|
|
}
|
|
}
|
|
}
|
|
if columnStr == "" {
|
|
columnStr = "*"
|
|
}
|
|
}
|
|
|
|
condSQL, condArgs, _ := builder.ToSQL(session.Statement.cond.And(autoCond))
|
|
|
|
args = append(session.Statement.joinArgs, condArgs...)
|
|
sqlStr = session.Statement.genSelectSQL(columnStr, condSQL)
|
|
// for mssql and use limit
|
|
qs := strings.Count(sqlStr, "?")
|
|
if len(args)*2 == qs {
|
|
args = append(args, args...)
|
|
}
|
|
} else {
|
|
sqlStr = session.Statement.RawSQL
|
|
args = session.Statement.RawParams
|
|
}
|
|
|
|
var err error
|
|
if session.canCache() {
|
|
if cacher := session.Engine.getCacher2(table); cacher != nil &&
|
|
!session.Statement.IsDistinct &&
|
|
!session.Statement.unscoped {
|
|
err = session.cacheFind(sliceElementType, sqlStr, rowsSlicePtr, args...)
|
|
if err != ErrCacheFailed {
|
|
return err
|
|
}
|
|
err = nil // !nashtsai! reset err to nil for ErrCacheFailed
|
|
session.Engine.logger.Warn("Cache Find Failed")
|
|
}
|
|
}
|
|
|
|
if sliceValue.Kind() != reflect.Map {
|
|
return session.noCacheFind(sliceValue, sqlStr, args...)
|
|
}
|
|
|
|
resultsSlice, err := session.query(sqlStr, args...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
keyType := sliceValue.Type().Key()
|
|
|
|
for _, results := range resultsSlice {
|
|
var newValue reflect.Value
|
|
if sliceElementType.Kind() == reflect.Ptr {
|
|
newValue = reflect.New(sliceElementType.Elem())
|
|
} else {
|
|
newValue = reflect.New(sliceElementType)
|
|
}
|
|
err := session.scanMapIntoStruct(newValue.Interface(), results)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var key interface{}
|
|
// if there is only one pk, we can put the id as map key.
|
|
if len(table.PrimaryKeys) == 1 {
|
|
key, err = str2PK(string(results[table.PrimaryKeys[0]]), keyType)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if keyType.Kind() != reflect.Slice {
|
|
panic("don't support multiple primary key's map has non-slice key type")
|
|
} else {
|
|
var keys core.PK = make([]interface{}, 0, len(table.PrimaryKeys))
|
|
for _, pk := range table.PrimaryKeys {
|
|
skey, err := str2PK(string(results[pk]), keyType)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
keys = append(keys, skey)
|
|
}
|
|
key = keys
|
|
}
|
|
}
|
|
|
|
if sliceElementType.Kind() == reflect.Ptr {
|
|
sliceValue.SetMapIndex(reflect.ValueOf(key), reflect.ValueOf(newValue.Interface()))
|
|
} else {
|
|
sliceValue.SetMapIndex(reflect.ValueOf(key), reflect.Indirect(reflect.ValueOf(newValue.Interface())))
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (session *Session) noCacheFind(sliceValue reflect.Value, sqlStr string, args ...interface{}) error {
|
|
var rawRows *core.Rows
|
|
var err error
|
|
|
|
session.queryPreprocess(&sqlStr, args...)
|
|
if session.IsAutoCommit {
|
|
_, rawRows, err = session.innerQuery(sqlStr, args...)
|
|
} else {
|
|
rawRows, err = session.Tx.Query(sqlStr, args...)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer rawRows.Close()
|
|
|
|
fields, err := rawRows.Columns()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var newElemFunc func() reflect.Value
|
|
sliceElementType := sliceValue.Type().Elem()
|
|
if sliceElementType.Kind() == reflect.Ptr {
|
|
newElemFunc = func() reflect.Value {
|
|
return reflect.New(sliceElementType.Elem())
|
|
}
|
|
} else {
|
|
newElemFunc = func() reflect.Value {
|
|
return reflect.New(sliceElementType)
|
|
}
|
|
}
|
|
|
|
var sliceValueSetFunc func(*reflect.Value)
|
|
|
|
if sliceValue.Kind() == reflect.Slice {
|
|
if sliceElementType.Kind() == reflect.Ptr {
|
|
sliceValueSetFunc = func(newValue *reflect.Value) {
|
|
sliceValue.Set(reflect.Append(sliceValue, reflect.ValueOf(newValue.Interface())))
|
|
}
|
|
} else {
|
|
sliceValueSetFunc = func(newValue *reflect.Value) {
|
|
sliceValue.Set(reflect.Append(sliceValue, reflect.Indirect(reflect.ValueOf(newValue.Interface()))))
|
|
}
|
|
}
|
|
}
|
|
|
|
var newValue = newElemFunc()
|
|
dataStruct := rValue(newValue.Interface())
|
|
if dataStruct.Kind() == reflect.Struct {
|
|
return session.rows2Beans(rawRows, fields, len(fields), session.Engine.autoMapType(dataStruct), newElemFunc, sliceValueSetFunc)
|
|
}
|
|
|
|
for rawRows.Next() {
|
|
var newValue = newElemFunc()
|
|
bean := newValue.Interface()
|
|
|
|
if err := rawRows.Scan(bean); err != nil {
|
|
return err
|
|
}
|
|
|
|
sliceValueSetFunc(&newValue)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (session *Session) cacheFind(t reflect.Type, sqlStr string, rowsSlicePtr interface{}, args ...interface{}) (err error) {
|
|
if !session.canCache() ||
|
|
indexNoCase(sqlStr, "having") != -1 ||
|
|
indexNoCase(sqlStr, "group by") != -1 {
|
|
return ErrCacheFailed
|
|
}
|
|
|
|
for _, filter := range session.Engine.dialect.Filters() {
|
|
sqlStr = filter.Do(sqlStr, session.Engine.dialect, session.Statement.RefTable)
|
|
}
|
|
|
|
newsql := session.Statement.convertIDSQL(sqlStr)
|
|
if newsql == "" {
|
|
return ErrCacheFailed
|
|
}
|
|
|
|
tableName := session.Statement.TableName()
|
|
|
|
table := session.Statement.RefTable
|
|
cacher := session.Engine.getCacher2(table)
|
|
ids, err := core.GetCacheSql(cacher, tableName, newsql, args)
|
|
if err != nil {
|
|
rows, err := session.DB().Query(newsql, args...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer rows.Close()
|
|
|
|
var i int
|
|
ids = make([]core.PK, 0)
|
|
for rows.Next() {
|
|
i++
|
|
if i > 500 {
|
|
session.Engine.logger.Debug("[cacheFind] ids length > 500, no cache")
|
|
return ErrCacheFailed
|
|
}
|
|
var res = make([]string, len(table.PrimaryKeys))
|
|
err = rows.ScanSlice(&res)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var pk core.PK = make([]interface{}, len(table.PrimaryKeys))
|
|
for i, col := range table.PKColumns() {
|
|
if col.SQLType.IsNumeric() {
|
|
n, err := strconv.ParseInt(res[i], 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pk[i] = n
|
|
} else if col.SQLType.IsText() {
|
|
pk[i] = res[i]
|
|
} else {
|
|
return errors.New("not supported")
|
|
}
|
|
}
|
|
|
|
ids = append(ids, pk)
|
|
}
|
|
|
|
session.Engine.logger.Debug("[cacheFind] cache sql:", ids, tableName, newsql, args)
|
|
err = core.PutCacheSql(cacher, ids, tableName, newsql, args)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
session.Engine.logger.Debug("[cacheFind] cache hit sql:", newsql, args)
|
|
}
|
|
|
|
sliceValue := reflect.Indirect(reflect.ValueOf(rowsSlicePtr))
|
|
|
|
ididxes := make(map[string]int)
|
|
var ides []core.PK
|
|
var temps = make([]interface{}, len(ids))
|
|
|
|
for idx, id := range ids {
|
|
sid, err := id.ToString()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
bean := cacher.GetBean(tableName, sid)
|
|
if bean == nil {
|
|
ides = append(ides, id)
|
|
ididxes[sid] = idx
|
|
} else {
|
|
session.Engine.logger.Debug("[cacheFind] cache hit bean:", tableName, id, bean)
|
|
|
|
pk := session.Engine.IdOf(bean)
|
|
xid, err := pk.ToString()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if sid != xid {
|
|
session.Engine.logger.Error("[cacheFind] error cache", xid, sid, bean)
|
|
return ErrCacheFailed
|
|
}
|
|
temps[idx] = bean
|
|
}
|
|
}
|
|
|
|
if len(ides) > 0 {
|
|
newSession := session.Engine.NewSession()
|
|
defer newSession.Close()
|
|
|
|
slices := reflect.New(reflect.SliceOf(t))
|
|
beans := slices.Interface()
|
|
|
|
if len(table.PrimaryKeys) == 1 {
|
|
ff := make([]interface{}, 0, len(ides))
|
|
for _, ie := range ides {
|
|
ff = append(ff, ie[0])
|
|
}
|
|
|
|
newSession.In("`"+table.PrimaryKeys[0]+"`", ff...)
|
|
} else {
|
|
for _, ie := range ides {
|
|
cond := builder.NewCond()
|
|
for i, name := range table.PrimaryKeys {
|
|
cond = cond.And(builder.Eq{"`" + name + "`": ie[i]})
|
|
}
|
|
newSession.Or(cond)
|
|
}
|
|
}
|
|
|
|
err = newSession.NoCache().Find(beans)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
vs := reflect.Indirect(reflect.ValueOf(beans))
|
|
for i := 0; i < vs.Len(); i++ {
|
|
rv := vs.Index(i)
|
|
if rv.Kind() != reflect.Ptr {
|
|
rv = rv.Addr()
|
|
}
|
|
id := session.Engine.IdOfV(rv)
|
|
sid, err := id.ToString()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
bean := rv.Interface()
|
|
temps[ididxes[sid]] = bean
|
|
session.Engine.logger.Debug("[cacheFind] cache bean:", tableName, id, bean, temps)
|
|
cacher.PutBean(tableName, sid, bean)
|
|
}
|
|
}
|
|
|
|
for j := 0; j < len(temps); j++ {
|
|
bean := temps[j]
|
|
if bean == nil {
|
|
session.Engine.logger.Warn("[cacheFind] cache no hit:", tableName, ids[j], temps)
|
|
// return errors.New("cache error") // !nashtsai! no need to return error, but continue instead
|
|
continue
|
|
}
|
|
if sliceValue.Kind() == reflect.Slice {
|
|
if t.Kind() == reflect.Ptr {
|
|
sliceValue.Set(reflect.Append(sliceValue, reflect.ValueOf(bean)))
|
|
} else {
|
|
sliceValue.Set(reflect.Append(sliceValue, reflect.Indirect(reflect.ValueOf(bean))))
|
|
}
|
|
} else if sliceValue.Kind() == reflect.Map {
|
|
var key = ids[j]
|
|
keyType := sliceValue.Type().Key()
|
|
var ikey interface{}
|
|
if len(key) == 1 {
|
|
ikey, err = str2PK(fmt.Sprintf("%v", key[0]), keyType)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if keyType.Kind() != reflect.Slice {
|
|
return errors.New("table have multiple primary keys, key is not core.PK or slice")
|
|
}
|
|
ikey = key
|
|
}
|
|
|
|
if t.Kind() == reflect.Ptr {
|
|
sliceValue.SetMapIndex(reflect.ValueOf(ikey), reflect.ValueOf(bean))
|
|
} else {
|
|
sliceValue.SetMapIndex(reflect.ValueOf(ikey), reflect.Indirect(reflect.ValueOf(bean)))
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|