b8c2b4020a
Use the go sql context functions (ExecContext, QueryContext etc...) The context is saved inside Tx so the library users should only pass it one time to the db.Do function.
74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
// Copyright 2019 Sorint.lab
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package db
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import (
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"context"
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"database/sql"
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sq "github.com/Masterminds/squirrel"
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errors "golang.org/x/xerrors"
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)
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const dbVersionTableDDLTmpl = `
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create table if not exists dbversion (version int not null, time timestamptz not null)
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`
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const dbVersion = 1
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func (db *DB) Create(ctx context.Context, stmts []string) error {
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sb := sq.StatementBuilder.PlaceholderFormat(sq.Dollar)
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err := db.Do(ctx, func(tx *Tx) error {
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if _, err := tx.Exec(dbVersionTableDDLTmpl); err != nil {
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return errors.Errorf("failed to create dbversion table: %w", err)
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}
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return nil
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})
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if err != nil {
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return err
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}
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err = db.Do(ctx, func(tx *Tx) error {
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var version sql.NullInt64
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q, args, err := sb.Select("max(version)").From("dbversion").ToSql()
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if err != nil {
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return err
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}
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if err := tx.QueryRow(q, args...).Scan(&version); err != nil {
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return errors.Errorf("cannot get current db version: %w", err)
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}
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if version.Valid {
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return nil
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}
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for _, stmt := range stmts {
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if _, err := tx.Exec(stmt); err != nil {
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return errors.Errorf("creation failed: %w", err)
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}
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}
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q, args, err = sb.Insert("dbversion").Columns("version", "time").Values(dbVersion, "now()").ToSql()
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if err != nil {
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return err
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}
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if _, err := tx.Exec(q, args...); err != nil {
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return errors.Errorf("failed to update dbversion table: %w", err)
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}
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return nil
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})
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return err
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}
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