/
postgres.go
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/
postgres.go
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/*
Copyright 2021 The KubeVela Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package postgres
import (
"context"
"errors"
"fmt"
"strings"
"time"
postgresorm "gorm.io/driver/postgres"
"gorm.io/gorm"
"gorm.io/gorm/clause"
"gorm.io/gorm/logger"
"k8s.io/klog/v2"
"github.com/kubevela/velaux/pkg/server/domain/model"
"github.com/kubevela/velaux/pkg/server/infrastructure/datastore"
"github.com/kubevela/velaux/pkg/server/infrastructure/datastore/sqlnamer"
)
type postgres struct {
client gorm.DB
database string
}
// New postgres datastore instance
func New(ctx context.Context, cfg datastore.Config) (datastore.DataStore, error) {
db, err := gorm.Open(postgresorm.Open(cfg.URL), &gorm.Config{
NamingStrategy: sqlnamer.SQLNamer{},
DisableForeignKeyConstraintWhenMigrating: true,
Logger: logger.Default.LogMode(logger.Error),
})
if err != nil {
return nil, err
}
for _, v := range model.GetRegisterModels() {
if err := db.WithContext(ctx).AutoMigrate(v); err != nil {
return nil, err
}
}
m := &postgres{
client: *db.WithContext(ctx),
database: cfg.Database,
}
return m, nil
}
// Add add data model
func (m *postgres) Add(ctx context.Context, entity datastore.Entity) error {
if entity.PrimaryKey() == "" {
return datastore.ErrPrimaryEmpty
}
if entity.TableName() == "" {
return datastore.ErrTableNameEmpty
}
entity.SetCreateTime(time.Now())
entity.SetUpdateTime(time.Now())
if dbAdd := m.client.WithContext(ctx).Create(entity); dbAdd.Error != nil {
if match := errors.Is(dbAdd.Error, gorm.ErrDuplicatedKey); match {
return datastore.ErrRecordExist
}
return datastore.NewDBError(dbAdd.Error)
}
return nil
}
// BatchAdd batch add entity, this operation has some atomicity.
func (m *postgres) BatchAdd(ctx context.Context, entities []datastore.Entity) error {
notRollback := make(map[string]bool)
for i, saveEntity := range entities {
if err := m.Add(ctx, saveEntity); err != nil {
if errors.Is(err, datastore.ErrRecordExist) {
notRollback[saveEntity.PrimaryKey()] = true
}
for _, deleteEntity := range entities[:i] {
if _, exit := notRollback[deleteEntity.PrimaryKey()]; !exit {
if err := m.Delete(ctx, deleteEntity); err != nil {
if !errors.Is(err, datastore.ErrRecordNotExist) {
klog.Errorf("rollback delete entity failure %w", err)
}
}
}
}
return datastore.NewDBError(fmt.Errorf("save entities occur error, %w", err))
}
}
return nil
}
// Get get data model
func (m *postgres) Get(ctx context.Context, entity datastore.Entity) error {
if entity.PrimaryKey() == "" {
return datastore.ErrPrimaryEmpty
}
if entity.TableName() == "" {
return datastore.ErrTableNameEmpty
}
if dbGet := m.client.WithContext(ctx).First(entity); dbGet.Error != nil {
if errors.Is(dbGet.Error, gorm.ErrRecordNotFound) {
return datastore.ErrRecordNotExist
}
return datastore.NewDBError(dbGet.Error)
}
return nil
}
// Put update data model
func (m *postgres) Put(ctx context.Context, entity datastore.Entity) error {
if entity.PrimaryKey() == "" {
return datastore.ErrPrimaryEmpty
}
if entity.TableName() == "" {
return datastore.ErrTableNameEmpty
}
entity.SetUpdateTime(time.Now())
if dbPut := m.client.WithContext(ctx).Model(entity).Updates(entity); dbPut.Error != nil {
if errors.Is(dbPut.Error, gorm.ErrRecordNotFound) {
return datastore.ErrRecordNotExist
}
return datastore.NewDBError(dbPut.Error)
}
return nil
}
// IsExist determine whether data exists.
func (m *postgres) IsExist(ctx context.Context, entity datastore.Entity) (bool, error) {
if entity.PrimaryKey() == "" {
return false, datastore.ErrPrimaryEmpty
}
if entity.TableName() == "" {
return false, datastore.ErrTableNameEmpty
}
if dbExist := m.client.WithContext(ctx).First(entity); dbExist.Error != nil {
if errors.Is(dbExist.Error, gorm.ErrRecordNotFound) {
return false, nil
}
return false, datastore.NewDBError(dbExist.Error)
}
return true, nil
}
// Delete delete data
func (m *postgres) Delete(ctx context.Context, entity datastore.Entity) error {
if entity.PrimaryKey() == "" {
return datastore.ErrPrimaryEmpty
}
if entity.TableName() == "" {
return datastore.ErrTableNameEmpty
}
// check entity is existed
if err := m.Get(ctx, entity); err != nil {
return err
}
if dbDelete := m.client.WithContext(ctx).Model(entity).Delete(entity); dbDelete.Error != nil {
klog.Errorf("delete document failure %w", dbDelete.Error)
return datastore.NewDBError(dbDelete.Error)
}
return nil
}
// _toColumnName converts keys of the models to lowercase as the column name are in lowercase in the database
func _toColumnName(columnName string) string {
return strings.ToLower(columnName)
}
func _applyFilterOptions(clauses []clause.Expression, filterOptions datastore.FilterOptions) []clause.Expression {
for _, queryOp := range filterOptions.Queries {
clauses = append(clauses, clause.Like{
Column: _toColumnName(queryOp.Key),
Value: fmt.Sprintf("%%%s%%", queryOp.Query),
})
}
for _, queryOp := range filterOptions.In {
values := make([]interface{}, len(queryOp.Values))
for i, v := range queryOp.Values {
values[i] = v
}
clauses = append(clauses, clause.IN{
Column: _toColumnName(queryOp.Key),
Values: values,
})
}
for _, queryOp := range filterOptions.IsNotExist {
clauses = append(clauses, clause.Eq{
Column: _toColumnName(queryOp.Key),
Value: "",
})
}
return clauses
}
// List list entity function
func (m *postgres) List(ctx context.Context, entity datastore.Entity, op *datastore.ListOptions) ([]datastore.Entity, error) {
if entity.TableName() == "" {
return nil, datastore.ErrTableNameEmpty
}
var (
clauses []clause.Expression
exprs []clause.Expression
limit int
offset int
)
if op != nil && op.PageSize > 0 && op.Page > 0 {
limit = op.PageSize
offset = op.PageSize * (op.Page - 1)
clauses = append(clauses, clause.Limit{
Limit: &limit,
Offset: offset,
})
}
for k, v := range entity.Index() {
exprs = append(exprs, clause.Eq{
Column: strings.ToLower(k),
Value: v,
})
}
if op != nil {
exprs = _applyFilterOptions(exprs, op.FilterOptions)
}
if len(exprs) > 0 {
clauses = append(clauses, clause.Where{
Exprs: exprs,
})
}
if op != nil && op.SortBy != nil {
var sortOption []clause.OrderByColumn
for _, v := range op.SortBy {
sortOption = append(sortOption, clause.OrderByColumn{
Column: clause.Column{
Name: strings.ToLower(v.Key),
},
Desc: v.Order == datastore.SortOrderDescending,
})
}
clauses = append(clauses, clause.OrderBy{
Columns: sortOption,
})
}
var list []datastore.Entity
rows, err := m.client.WithContext(ctx).Model(entity).Clauses(clauses...).Rows()
if err != nil {
return nil, datastore.NewDBError(err)
}
defer func() {
if err := rows.Close(); err != nil {
klog.Warningf("close rows failure %s", err.Error())
}
}()
for rows.Next() {
item, err := datastore.NewEntity(entity)
if err != nil {
return nil, datastore.NewDBError(err)
}
err = m.client.WithContext(ctx).ScanRows(rows, &item)
if err != nil {
return nil, datastore.NewDBError(fmt.Errorf("row scan failure %w", err))
}
list = append(list, item)
}
if err := rows.Err(); err != nil {
return nil, datastore.NewDBError(err)
}
return list, nil
}
// Count counts entities
func (m *postgres) Count(ctx context.Context, entity datastore.Entity, filterOptions *datastore.FilterOptions) (int64, error) {
if entity.TableName() == "" {
return 0, datastore.ErrTableNameEmpty
}
var (
count int64
exprs []clause.Expression
clauses []clause.Expression
)
for k, v := range entity.Index() {
exprs = append(exprs, clause.Eq{
Column: strings.ToLower(k),
Value: v,
})
}
if filterOptions != nil {
exprs = _applyFilterOptions(exprs, *filterOptions)
}
if len(exprs) > 0 {
clauses = append(clauses, clause.Where{
Exprs: exprs,
})
}
if dbCount := m.client.WithContext(ctx).Model(entity).Clauses(clauses...).Count(&count); dbCount.Error != nil {
return 0, datastore.NewDBError(dbCount.Error)
}
return count, nil
}