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fixer.go
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fixer.go
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/*
Copyright 2023 bgq98
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 fixer
import (
"context"
"gorm.io/gorm"
"gorm.io/gorm/clause"
"github.com/bgq98/utils/migrator"
)
type OverrideFixer[T migrator.Entity] struct {
base *gorm.DB
target *gorm.DB
columns []string
}
func NewOverrideFixer[T migrator.Entity](base *gorm.DB, target *gorm.DB) (*OverrideFixer[T], error) {
var t T
rows, err := target.Model(&t).Limit(1).Rows()
if err != nil {
return nil, err
}
columns, err := rows.Columns()
if err != nil {
return nil, err
}
return &OverrideFixer[T]{
base: base,
target: target,
columns: columns,
}, nil
}
func (o *OverrideFixer[T]) Fix(ctx context.Context, id int64) error {
var src T
err := o.base.WithContext(ctx).Where("id = ?", id).First(&src).Error
switch err {
case nil:
return o.target.Clauses(&clause.OnConflict{
DoUpdates: clause.AssignmentColumns(o.columns),
}).Create(&src).Error
case gorm.ErrRecordNotFound:
return o.target.Delete("id = ?", id).Error
default:
return err
}
}