Method AddVar

statement.go:175–269

AddVar add var

(writer clause.Writer, vars ...interface{})

// AddVar add var
func (stmt *Statement) AddVar(writer clause.Writer, vars ...interface{}) {
	for idx, v := range vars {
		if idx > 0 {
			writer.WriteByte(',')
		}

		switch v := v.(type) {
		case sql.NamedArg:
			stmt.Vars = append(stmt.Vars, v.Value)
		case clause.Column, clause.Table:
			stmt.QuoteTo(writer, v)
		case Valuer:
			reflectValue := reflect.ValueOf(v)
			if reflectValue.Kind() == reflect.Ptr && reflectValue.IsNil() {
				stmt.AddVar(writer, nil)
			} else {
				stmt.AddVar(writer, v.GormValue(stmt.Context, stmt.DB))
			}
		case clause.Interface:
			c := clause.Clause{Name: v.Name()}
			v.MergeClause(&c)
			c.Build(stmt)
		case clause.Expression:
			v.Build(stmt)
		case driver.Valuer:
			stmt.Vars = append(stmt.Vars, v)
			stmt.DB.Dialector.BindVarTo(writer, stmt, v)
		case []byte:
			stmt.Vars = append(stmt.Vars, v)
			stmt.DB.Dialector.BindVarTo(writer, stmt, v)
		case []interface{}:
			if len(v) > 0 {
				writer.WriteByte('(')
				stmt.AddVar(writer, v...)
				writer.WriteByte(')')
			} else {
				writer.WriteString("(NULL)")
			}
		case interface{ getInstance() *DB }:
			cv := v.getInstance()

			subdb := cv.Session(&Session{Logger: logger.Discard, DryRun: true}).getInstance()
			if cv.Statement.SQL.Len() > 0 {
				var (
					vars = subdb.Statement.Vars
					sql  = cv.Statement.SQL.String()
				)

				subdb.Statement.Vars = make([]interface{}, 0, len(vars))
				for _, vv := range vars {
					subdb.Statement.Vars = append(subdb.Statement.Vars, vv)
					bindvar := strings.Builder{}
					cv.BindVarTo(&bindvar, subdb.Statement, vv)
					sql = strings.Replace(sql, bindvar.String(), "?", 1)
				}

				subdb.Statement.SQL.Reset()
				subdb.Statement.Vars = stmt.Vars