1 files changed, 177 insertions, 0 deletions
diff --git a/vendor/github.com/go-xorm/xorm/session_get.go b/vendor/github.com/go-xorm/xorm/session_get.go
new file mode 100644
index 00000000..f32bf481
--- /dev/null
+++ b/vendor/github.com/go-xorm/xorm/session_get.go
@@ -0,0 +1,177 @@
+// 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"
+	"reflect"
+	"strconv"
+
+	"github.com/go-xorm/core"
+)
+
+// Get retrieve one record from database, bean's non-empty fields
+// will be as conditions
+func (session *Session) Get(bean interface{}) (bool, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	session.Statement.setRefValue(rValue(bean))
+
+	var sqlStr string
+	var args []interface{}
+
+	if session.Statement.RawSQL == "" {
+		if len(session.Statement.TableName()) <= 0 {
+			return false, ErrTableNotFound
+		}
+		session.Statement.Limit(1)
+		sqlStr, args = session.Statement.genGetSQL(bean)
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	if session.canCache() {
+		if cacher := session.Engine.getCacher2(session.Statement.RefTable); cacher != nil &&
+			!session.Statement.unscoped {
+			has, err := session.cacheGet(bean, sqlStr, args...)
+			if err != ErrCacheFailed {
+				return has, err
+			}
+		}
+	}
+
+	return session.nocacheGet(bean, sqlStr, args...)
+}
+
+func (session *Session) nocacheGet(bean interface{}, sqlStr string, args ...interface{}) (bool, 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 false, err
+	}
+
+	defer rawRows.Close()
+
+	if rawRows.Next() {
+		fields, err := rawRows.Columns()
+		if err == nil {
+			err = session.row2Bean(rawRows, fields, len(fields), bean)
+		}
+		return true, err
+	}
+	return false, nil
+}
+
+func (session *Session) cacheGet(bean interface{}, sqlStr string, args ...interface{}) (has bool, err error) {
+	// if has no reftable, then don't use cache currently
+	if !session.canCache() {
+		return false, 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 false, ErrCacheFailed
+	}
+
+	cacher := session.Engine.getCacher2(session.Statement.RefTable)
+	tableName := session.Statement.TableName()
+	session.Engine.logger.Debug("[cacheGet] find sql:", newsql, args)
+	ids, err := core.GetCacheSql(cacher, tableName, newsql, args)
+	table := session.Statement.RefTable
+	if err != nil {
+		var res = make([]string, len(table.PrimaryKeys))
+		rows, err := session.DB().Query(newsql, args...)
+		if err != nil {
+			return false, err
+		}
+		defer rows.Close()
+
+		if rows.Next() {
+			err = rows.ScanSlice(&res)
+			if err != nil {
+				return false, err
+			}
+		} else {
+			return false, ErrCacheFailed
+		}
+
+		var pk core.PK = make([]interface{}, len(table.PrimaryKeys))
+		for i, col := range table.PKColumns() {
+			if col.SQLType.IsText() {
+				pk[i] = res[i]
+			} else if col.SQLType.IsNumeric() {
+				n, err := strconv.ParseInt(res[i], 10, 64)
+				if err != nil {
+					return false, err
+				}
+				pk[i] = n
+			} else {
+				return false, errors.New("unsupported")
+			}
+		}
+
+		ids = []core.PK{pk}
+		session.Engine.logger.Debug("[cacheGet] cache ids:", newsql, ids)
+		err = core.PutCacheSql(cacher, ids, tableName, newsql, args)
+		if err != nil {
+			return false, err
+		}
+	} else {
+		session.Engine.logger.Debug("[cacheGet] cache hit sql:", newsql)
+	}
+
+	if len(ids) > 0 {
+		structValue := reflect.Indirect(reflect.ValueOf(bean))
+		id := ids[0]
+		session.Engine.logger.Debug("[cacheGet] get bean:", tableName, id)
+		sid, err := id.ToString()
+		if err != nil {
+			return false, err
+		}
+		cacheBean := cacher.GetBean(tableName, sid)
+		if cacheBean == nil {
+			/*newSession := session.Engine.NewSession()
+			defer newSession.Close()
+			cacheBean = reflect.New(structValue.Type()).Interface()
+			newSession.Id(id).NoCache()
+			if session.Statement.AltTableName != "" {
+				newSession.Table(session.Statement.AltTableName)
+			}
+			if !session.Statement.UseCascade {
+				newSession.NoCascade()
+			}
+			has, err = newSession.Get(cacheBean)
+			*/
+			cacheBean = bean
+			has, err = session.nocacheGet(cacheBean, sqlStr, args...)
+			if err != nil || !has {
+				return has, err
+			}
+
+			session.Engine.logger.Debug("[cacheGet] cache bean:", tableName, id, cacheBean)
+			cacher.PutBean(tableName, sid, cacheBean)
+		} else {
+			session.Engine.logger.Debug("[cacheGet] cache hit bean:", tableName, id, cacheBean)
+			has = true
+		}
+		structValue.Set(reflect.Indirect(reflect.ValueOf(cacheBean)))
+
+		return has, nil
+	}
+	return false, nil
+}