Merge branch 'oinume-feature/softdelete'

engine.go

@@ -776,6 +776,8 @@ func (engine *Engine) mapType(v reflect.Value) *core.Table {
 						col.Default = "1"
 					case k == "UPDATED":
 						col.IsUpdated = true
+					case k == "DELETED":
+						col.IsDeleted = true
 					case strings.HasPrefix(k, "INDEX(") && strings.HasSuffix(k, ")"):
 						indexName := k[len("INDEX")+1 : len(k)-1]
 						indexNames[indexName] = core.IndexType
@@ -1414,3 +1416,10 @@ func (engine *Engine) FormatTime(sqlTypeName string, t time.Time) (v interface{}
 	}
 	return
 }
+
+// Always disable struct tag "deleted"
+func (engine *Engine) Unscoped() *Session {
+	session := engine.NewSession()
+	session.IsAutoClose = true
+	return session.Unscoped()
+}

session.go

@@ -1079,7 +1079,7 @@ func (session *Session) Find(rowsSlicePtr interface{}, condiBean ...interface{})
 	if len(condiBean) > 0 {
 		colNames, args := buildConditions(session.Engine, table, condiBean[0], true, true,
 			false, true, session.Statement.allUseBool, session.Statement.useAllCols,
-			session.Statement.mustColumnMap)
+			session.Statement.unscoped, session.Statement.mustColumnMap)
 		session.Statement.ConditionStr = strings.Join(colNames, " AND ")
 		session.Statement.BeanArgs = args
 	}
@@ -3172,7 +3172,7 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 	if len(condiBean) > 0 {
 		condiColNames, condiArgs = buildConditions(session.Engine, session.Statement.RefTable, condiBean[0], true, true,
 			false, true, session.Statement.allUseBool, session.Statement.useAllCols,
-			session.Statement.mustColumnMap)
+			session.Statement.unscoped, session.Statement.mustColumnMap)
 	}
 
 	var condition = ""
@@ -3376,7 +3376,7 @@ func (session *Session) Delete(bean interface{}) (int64, error) {
 	session.Statement.RefTable = table
 	colNames, args := buildConditions(session.Engine, table, bean, true, true,
 		false, true, session.Statement.allUseBool, session.Statement.useAllCols,
-		session.Statement.mustColumnMap)
+		session.Statement.unscoped, session.Statement.mustColumnMap)
 
 	var condition = ""
 	var andStr = session.Engine.dialect.AndStr()
@@ -3402,13 +3402,39 @@ func (session *Session) Delete(bean interface{}) (int64, error) {
 		return 0, ErrNeedDeletedCond
 	}
 
-	sqlStr := fmt.Sprintf("DELETE FROM %v WHERE %v",
+	sqlStr, sqlStrForCache := "", ""
+	argsForCache := make([]interface{}, 0, len(args) * 2)
+	if session.Statement.unscoped || table.DeletedColumn() == nil { // tag "deleted" is disabled
+		sqlStr = fmt.Sprintf("DELETE FROM %v WHERE %v",
 			session.Engine.Quote(session.Statement.TableName()), condition)
 
+		sqlStrForCache = sqlStr
+		copy(argsForCache, args)
+		argsForCache = append(session.Statement.Params, argsForCache...)
+	} else {
+		// !oinume! sqlStrForCache and argsForCache is needed to behave as executing "DELETE FROM ..." for cache.
+		sqlStrForCache = fmt.Sprintf("DELETE FROM %v WHERE %v",
+			session.Engine.Quote(session.Statement.TableName()), condition)
+		copy(argsForCache, args)
+		argsForCache = append(session.Statement.Params, argsForCache...)
+
+		deletedColumn := table.DeletedColumn()
+		sqlStr = fmt.Sprintf("UPDATE %v SET %v = ? WHERE %v",
+			session.Engine.Quote(session.Statement.TableName()),
+			session.Engine.Quote(deletedColumn.Name),
+			condition)
+
+		// !oinume! Insert NowTime to the head of session.Statement.Params
+		session.Statement.Params = append(session.Statement.Params, "")
+		paramsLen := len(session.Statement.Params)
+		copy(session.Statement.Params[1:paramsLen], session.Statement.Params[0:paramsLen-1])
+		session.Statement.Params[0] = session.Engine.NowTime(deletedColumn.SQLType.Name)
+	}
+
 	args = append(session.Statement.Params, args...)
 
 	if cacher := session.Engine.getCacher2(session.Statement.RefTable); cacher != nil && session.Statement.UseCache {
-		session.cacheDelete(sqlStr, args...)
+		session.cacheDelete(sqlStrForCache, argsForCache...)
 	}
 
 	res, err := session.exec(sqlStr, args...)
@@ -3612,6 +3638,12 @@ func (s *Session) Sync2(beans ...interface{}) error {
 	return nil
 }
 
+// Always disable struct tag "deleted"
+func (session *Session) Unscoped() *Session {
+	session.Statement.Unscoped()
+	return session
+}
+
 func genCols(table *core.Table, session *Session, bean interface{}, useCol bool, includeQuote bool) ([]string, []interface{}, error) {
 	colNames := make([]string, 0)
 	args := make([]interface{}, 0)
@@ -3651,6 +3683,10 @@ func genCols(table *core.Table, session *Session, bean interface{}, useCol bool,
 			}
 		}
 
+		if col.IsDeleted {
+			continue
+		}
+
 		if session.Statement.ColumnStr != "" {
 			if _, ok := session.Statement.columnMap[lColName]; !ok {
 				continue

statement.go

@@ -57,6 +57,7 @@ type Statement struct {
 	IsDistinct    bool
 	allUseBool    bool
 	checkVersion  bool
+	unscoped      bool
 	mustColumnMap map[string]bool
 	inColumns     map[string]*inParam
 	incrColumns   map[string]incrParam
@@ -91,6 +92,7 @@ func (statement *Statement) Init() {
 	statement.useAllCols = false
 	statement.mustColumnMap = make(map[string]bool)
 	statement.checkVersion = true
+	statement.unscoped = false
 	statement.inColumns = make(map[string]*inParam)
 	statement.incrColumns = make(map[string]incrParam)
 	statement.decrColumns = make(map[string]decrParam)
@@ -286,6 +288,9 @@ func buildUpdates(engine *Engine, table *core.Table, bean interface{},
 		if !includeAutoIncr && col.IsAutoIncrement {
 			continue
 		}
+		if col.IsDeleted {
+			continue
+		}
 
 		if engine.dialect.DBType() == core.MSSQL && col.SQLType.Name == core.Text {
 			continue
@@ -465,7 +470,7 @@ func buildUpdates(engine *Engine, table *core.Table, bean interface{},
 // Auto generating conditions according a struct
 func buildConditions(engine *Engine, table *core.Table, bean interface{},
 	includeVersion bool, includeUpdated bool, includeNil bool,
-	includeAutoIncr bool, allUseBool bool, useAllCols bool,
+	includeAutoIncr bool, allUseBool bool, useAllCols bool, unscoped bool,
 	mustColumnMap map[string]bool) ([]string, []interface{}) {
 
 	colNames := make([]string, 0)
@@ -490,6 +495,10 @@ func buildConditions(engine *Engine, table *core.Table, bean interface{},
 			continue
 		}
 
+		if col.IsDeleted && !unscoped { // tag "deleted" is enabled
+			colNames = append(colNames, fmt.Sprintf("%v IS NULL", engine.Quote(col.Name)))
+		}
+
 		fieldValue := *fieldValuePtr
 		if fieldValue.Interface() == nil {
 			continue
@@ -926,6 +935,12 @@ func (statement *Statement) Having(conditions string) *Statement {
 	return statement
 }
 
+// Always disable struct tag "deleted"
+func (statement *Statement) Unscoped() *Statement {
+	statement.unscoped = true
+	return statement
+}
+
 func (statement *Statement) genColumnStr() string {
 	table := statement.RefTable
 	colNames := make([]string, 0)
@@ -1030,7 +1045,7 @@ func (statement *Statement) genGetSql(bean interface{}) (string, []interface{})
 
 	colNames, args := buildConditions(statement.Engine, table, bean, true, true,
 		false, true, statement.allUseBool, statement.useAllCols,
-		statement.mustColumnMap)
+		statement.unscoped, statement.mustColumnMap)
 
 	statement.ConditionStr = strings.Join(colNames, " "+statement.Engine.dialect.AndStr()+" ")
 	statement.BeanArgs = args
@@ -1076,7 +1091,8 @@ func (statement *Statement) genCountSql(bean interface{}) (string, []interface{}
 	statement.RefTable = table
 
 	colNames, args := buildConditions(statement.Engine, table, bean, true, true, false,
-		true, statement.allUseBool, statement.useAllCols, statement.mustColumnMap)
+		true, statement.allUseBool, statement.useAllCols,
+		statement.unscoped, statement.mustColumnMap)
 
 	statement.ConditionStr = strings.Join(colNames, " "+statement.Engine.Dialect().AndStr()+" ")
 	statement.BeanArgs = args